+---------+------------------------------------------------------------+
| ![      | # VIIth IAHS Scientific Assembly                           |
| ](media |                                                            |
| /image1 | *VII^e^Assemblée Scientifique de l'AISH*                   |
| .jpeg){ |                                                            |
| width=" |                                                            |
| 0.75138 |                                                            |
| 8888888 |                                                            |
| 8889in" |                                                            |
| he      |                                                            |
| ight="0 |                                                            |
| .739583 |                                                            |
| 3333333 |                                                            |
| 334in"} |                                                            |
+---------+------------------------------------------------------------+
| !       |                                                            |
| [](medi |                                                            |
| a/image |                                                            |
| 2.jpeg) |                                                            |
| {width= |                                                            |
| "6.3in" |                                                            |
| hei     |                                                            |
| ght="4. |                                                            |
| 725in"} |                                                            |
+---------+------------------------------------------------------------+
| ##      |                                                            |
|         |                                                            |
| ## F    |                                                            |
| oz do I |                                                            |
| guaçu ( |                                                            |
| Brazil) |                                                            |
|         |                                                            |
| 4-9     |                                                            |
| April/  |                                                            |
| *avril* |                                                            |
| 2005    |                                                            |
|         |                                                            |
|  ht     |                                                            |
| tp://ia |                                                            |
| hs.info |                                                            |
+---------+------------------------------------------------------------+

Draft 30 December 2003

Local Organizing Committee

Sergio KOIDE

Adresse: SQN 106 Bloco I apto. 606

Asa Norte, 70742-090 Brasilia -- DF, Brazil

e-mail -- <skoide@unb.br>

Fax: + 55 61-347-4743

Tel: +55 61 307-2304 ext 20 ou +55 61 9961-5843

Miriam Rita Moro MINE

Adresse: Rua D. Alice Tibiriçá, 611, ap. 1602

80730-320 -- Curitiba -- PR , Brazil

e-mail; <mrmine.dhs@ufpr.br>

Fax : +55 041 361 3143

Tel : +55 41 3613145 ou +55 41 9981-1649

Carlos Eduardo Morelli TUCCI

Adresse: Rua Lavradio,150 c1

90690-370 Porto Alegre -- RS, Brazil

e-mail: <cemtucci@uol.com.br>

fax: +55 51 3316 7292

Tel.: +55 51 3316 6408

Daniel F. BARRERA

Adresse: Universidad de Buenos Aires

Departamento de Ciências de la Atmósfera y los Océanos

Ciudad Universitária -- Pabellón 2

\(1428\) Buenos Aires -- Argentina

e-mail -- <barrera@at.fcen.uba.ar>

Fax: +54 11 4576 3356/3364

Tel.: +54 11 4576 3356/3364

Elena BENITIZ

Adresse: DGPCRH/SEAM - Madame Linch, 3500

Asuncion, Paraguay

e-mail: <elenajefe@hotmail.com>

Fax: +595 21 615811

Tel.:+595 981 428614

Eduardo Mario MENDIONDO

Adresse: Universidade de São Paulo

Escola de Engenharia de São Carlos

Departamento de Hidráulica e Saneamento

Caixa Postal 359, 13566-590 -- são Carlos -- SP, Brazil

Email: <emm@sc.usp.br>

Fax: +55 16 273 9550

Tel.: +55 16 273 9542 or +55 16 273 9571

Juan Carlos BERTONI

Adresse: Universidad Nacional de Córdoba

Instituto Superior de Recursos Hídricos

Pabellón Ingeniería. Box 15

Facultad de Ciencias Exactas, Físicas y Naturales

5000 -- Córdoba, Argentina

e-mail: <jcbertoni@arnet.com.ar>

Fax /Tel escritorio: + 54 351 4334415

Fax /Tel residencial: + 54 3541 427140

Maria Josefa FIORITI

Adresse: Secretaría de Recursos Naturales y Desarrollo Sustentable,

Subsecretaría de Recursos Hídricos,

Paseo Colón 189 -- Piso 8 -- Oficina 807 (1109ADA),

Buenos Aires, Argentina

e-mail: <mfiori@miv.gov.ar>

Fax: +54 11 4349-7453

Tel.: +54 11 4349-7453

Roger MONTE DOMECQ\
Adresse: Universidad Nacional de Asunción, Facultad de Ingeniería\
Departamento de Investigación y Desarrollo\
Campus Isla Bogado, Luque, Paraguay\
e-mail: <romonte@foroagua.org.py>\
Fax: + 595 21 646162\
Tel.: + 595 21 646152 /

With the support of [ABRH Associação Brasileira de Resursos
Hidricos](http://www.abrh.org.br/)

Partners :

UNESCO, WMO, IAEA, WWAP, IAH, WCP-Water, IUGG, IAMAS

Wednesday(?) Tour to the Igassu Waterfalls and to Itaipu Dam

Possible pre or post "Glacier Tour" in the Andes (Argentina, Chile,
Bolivia ?)

###### IAHS Bureau meeting

Sunday 3 April 2005

#  

## SUMMARY PROGRAMME

## 

+-------------------------------------------------------+--------------+
| ## Symposium/Workshop                                 | ## Dur       |
|                                                       | ation (days) |
+-------------------------------------------------------+--------------+
| W#1 Hydrology in 2020: What shall we target now?      | ## ½         |
| (Hydrology 2020, UNESCO,WMO, IAEA)                    |              |
|                                                       |              |
| Convener Taikan OKI                                   |              |
+-------------------------------------------------------+--------------+
| ## W#2 Hydrology and Health (ICSW)                    | ## 1         |
|                                                       |              |
| Convener Eric SERVAT                                  |              |
+-------------------------------------------------------+--------------+
| W#3 Hydrological Basis of Dam Safety with Respect to  | ## 1         |
| Floods (ICWRS)                                        |              |
|                                                       |              |
| ## Convenor Andreas SCHUMANN                          |              |
+-------------------------------------------------------+--------------+
| W#4 Andean Glaciology (ICSI)                          | ## 1         |
|                                                       |              |
| ## Convener Jefferson SIMOES                          |              |
+-------------------------------------------------------+--------------+
| # W#5 Model Parameter Estimation                      | ## 1         |
|  MOPEX-5 (IAHS/WMO WG on GEWEX, ICCLAS, ICSW, PUB WG) |              |
|                                                       |              |
| Convener Alan HALL                                    |              |
+-------------------------------------------------------+--------------+
| W#6 Transferring Hydrological Data Across Spatial and | ## 1         |
| Temporal Scales (IAHS/WMO WG on GEWEX, PUB WG,        |              |
| ICCLAS, ICRS and other commissions)                   |              |
|                                                       |              |
| Convener Lawrence MARTZ                               |              |
+-------------------------------------------------------+--------------+
| > W#7 Land-use and Water Quality Relationships in     | ## 1         |
| > Ungauged Basins (ICCE, ICWQ, ICGW, PUB)             |              |
|                                                       |              |
| Convener Mary HILL                                    |              |
+-------------------------------------------------------+--------------+
| > W#8 Workshop on Isotope Tracers and Remote          | ## 1         |
| > SensingTechniques for Assessing Water Cycle         |              |
| > Variability (ICT, ICRS, PUB)                        |              |
| >                                                     |              |
| > Convener John J. GIBSON                             |              |
+-------------------------------------------------------+--------------+
| W#9 PUB Working Groups: Progress in PUB               | ## ½         |
| Implementation                                        |              |
|                                                       |              |
| Convener Murugesu SIVAPALAN                           |              |
+-------------------------------------------------------+--------------+
|                                                       | ##           |
+-------------------------------------------------------+--------------+
| ## S#1 Sediment Budgets (ICCE)                        | ## 3         |
|                                                       |              |
| Convener Des WALLING                                  |              |
+-------------------------------------------------------+--------------+
| S#2 Sustainable Water Management Solutions for Large  | ## 2         |
| Cities (ICWRS)                                        |              |
|                                                       |              |
| ## Convener Dragan SAVIC                              |              |
+-------------------------------------------------------+--------------+
| S#3 Groundwater Resources Sustainability Indicators   | ## 1         |
| (ICWQ, ICGW, ICWRS, UNESCO-IHP, WWAP, IAH)            |              |
|                                                       |              |
| ## Convener ?                                         |              |
+-------------------------------------------------------+--------------+
| > S#4 Dynamics and Biogeochemistry of River Corridors | ## 2         |
| > and Wetlands (ICWQ, ICSW, ICGW)                     |              |
|                                                       |              |
| ## Convenor Louise HEATHWAITE                         |              |
+-------------------------------------------------------+--------------+
| S#5 Contribution from Glaciers and Snow Cover to      | ## 1         |
| Runoff from Mountains in Different Climates (ICSI)    |              |
|                                                       |              |
| ## Convener Regine HOCK                               |              |
+-------------------------------------------------------+--------------+
| S#6 Regional Hydrologic Impacts of Climatic           | ##           |
| Variability and Change with an Emphasis on Less       |              |
| Developed Countries (ICCLAS, ICSW, IAMAS endorsed by  | ## 2         |
| WCRP, CLIVAR, GEWEX plus WMO/UNESCO WCP-Water)        |              |
|                                                       |              |
| ## Convener Thorsten WAGENER                          |              |
+-------------------------------------------------------+--------------+
| ## S#7 Predic                                         | ## 4         |
| tion in Ungauged Basins : Promises and Progress (PUB) |              |
+-------------------------------------------------------+--------------+
| ## 7-1.                                               | ##           |
|  Model improvements through detailed process studies  |              |
|                                                       |              |
| Convener Stephen UHLENBROOK                           |              |
+-------------------------------------------------------+--------------+
| 7-2. Model evaluation and comparison: uncertainty     | ##           |
| analysis and diagnostics\                             |              |
| Convener Stewart FRANKS                               |              |
+-------------------------------------------------------+--------------+
| 7-3. New data collection approaches and model         | ##           |
| development                                           |              |
|                                                       |              |
| Convener Venkat LAKSHMI                               |              |
+-------------------------------------------------------+--------------+
| 7-4. Complex Systems and Ecohydrology                 | ##           |
|                                                       |              |
| Convener Praveen KUMAR                                |              |
+-------------------------------------------------------+--------------+
| # 7-5. Nonlinearity, Complexity, Scaling and PUB      | ##           |
|                                                       |              |
| Convener Daniel SCHERTZER                             |              |
+-------------------------------------------------------+--------------+
| 7-6. New Distributed Modelling Approaches and Methods | ##           |
| for Testing Models Against Observations               |              |
|                                                       |              |
| Convener Erwin ZEHE                                   |              |
+-------------------------------------------------------+--------------+

W#1 WORKSHOP on Hydrology in 2020: What shall we target now? (Hydrology
2020)

Hydrologists have an important role in addressing the world\'s water
problems, yet hydrology is often overlooked in the search for solutions.
The IAHS has established a working group of young hydrologists to
identify possible and recommended directions for the field of hydrology
over the next 20 years. The draft of their intermediate report was
discussed in an open workshop at IUGG/IAHS Sapporo. The final version of
their report \"Hydrology in 2020\" will be presented in the workshop,
which includes the recognition of current hydrology, future vision of
hydrological science and societal needs, and science and implementation
plans what we shall think about now. In the workshop, there will be
comprehensive discussions on what is the hydrology, what shall be the
hydrology in 2020, and what we shall start pursuing to achieve the ideal
shape of hydrology in 2020.

Main Convener :

Taikan OKI <oki@chikyu.ac.jp>

> Institute of Industrial Science, University of Tokyo
>
> 4-6-1 Meguro-ku, Komaba, Tokyo 153-8505, Japan
>
> Tel: +81 (03) 5452-6382 ; Fax: +81 (03) 5452-6383

#### Co-conveners

Kate HEAL <kheal@srv0.bio.ed.ac.uk>

University of Edinburgh, School of GeoSciences

Darwin Building, Mayfield Road, Edinburgh EH9 3JU, Scotland, United
Kingdom

Tel: +44 131 650 5420 ; Fax: +44 131 662 0478

Caterina VALEO <valeo@geomatics.ucalgary.ca>

Department of Geomatics Engineering, University of Calgary

2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4

Tel:(403) 220-4112 Fax:(403) 284-1980

Johan KUYLENSTIERNA <Johan.Kuylenstierna@siwi.org>

ERM Scandinavia

Box 26175, 100 41 Stockholm, Sweden

Tel: +46 8 667 8868 ; Fax: +46 8 663 2230

Eduardo Mario MENDIONDO <emm@sc.usp.br>

Universidade de São Paulo

Escola de Engenharia de São Carlos, Departamento de Hidráulica e
Saneamento

Caixa Postal 359, 13566-590 -- são Carlos -- SP, Brazil

Fax: +55 16 273 9550 ; Tel.: +55 16 273 9542 or +55 16 273 9571

*\[Propose: ½ day, schedule near the beginning of the Assembly\]*

## 

## W#2 WORKSHOP on Hydrology and Health (ICSW)

In developing countries, it has been strongly established that water was
a very important vector for numerous and dangerous diseases (malaria,
onchocerciasis, diarrhoea, etc.). It underlines how much health aspects
related to water, and not only access to freshwater, became, nowadays, a
key question.

The global context of climate variability, and its strong impacts on
hydrology and water resources, gives an additional dimension to that
relationship between water and health. Actually, recent studies
emphasize the part of some specific climatic situations before the
beginning of serious epidemics.

The main purpose of the workshop is to bring together scientists from
various fields of research (hydrologists, climatologists, doctors,
epidemiologists, virologists, entomologists, etc.) who have or had
experience of interdisciplinary programmes on climate, hydrology and
health. Scientists who are not currently participating in such large
programmes but who have an experience in that scientific domain are also
welcome.

The workshop will be a good opportunity to present results and
methodologies. It should also be a good opportunity to think about the
setting up of an International Symposium to be held during the next IUGG
Conference in Perugia (Italy, 2007).

Main Convenor :

Eric SERVAT, <eric.servat@msem.univ-montp2.fr>

> IRD-Hydrologie, Laboratoire Hydrosciences -- MSE
>
> Université Montpellier II, 34095 Montpellier cedex 5, France
>
> Tel +33 (0)4 67 14 90 20 ; Fax +33 (0)4 67 14 90 10

Co-convenors :

Mandira SHRESTHA, <mshrestha@icimod.org.np>

International Centre for Integrated Mountain Development (ICIMOD)

GPO Box 3258, Jawalakhel, Kathmandu, Nepal

Tel: 977 1 525313 ; Fax: 977 1 524509

Jean-François TRAPE, <trape@ird.sn>

Jean-Emmanuel PATUREL, <paturel@msem.univ-montp2.fr>

UM II -- Hydosciences Montpellier

Case MSE -- Place Eugène Bataillon - 34095 Montpellier Cedex 5, France

tel. : 04 67 14 90 14 ; fax : 04 67 14 90 10 

Beatriz CEBALLOS, <dcct@cct.ufpb.br>

Nicolás SCHWEIGMANN, <nicolas@bg.fcen.uba.ar>

> Departamento de Ecología, Genética y Evolución
>
> Facultad de Ciencias Exactas y Naturales UBA
>
> Ciudad Universitaria pabellon II 4to. piso. Lab 54
>
> Int. Guiraldes 2620 , Nuñez (CP 1428EHA)
>
> Ciudad Autónoma de Buenos Aires
>
> Fax.: 05411  4576-3384 ; Tel:   05411  4576-3300 interno 364

*\[Propose: 1 day\]*

W#3 WORKSHOP on the Hydrological Basis of Dam Safety with Respect to
Floods (ICWRS)

The steadily increasing number of dams and the problems of limited and
even reduced hydrological data bases lead to severe problems for
assessment of design flood estimates. The PUB initiative of IAHS tries
to find new solutions for poorly gauged or ungauged river basins. At
this workshop the problems of how to specify design floods for obtaining
a required dam safety level at sites with limited data availability will
be discussed in detail. The many existing and different approaches and
experiences in different parts of the world should be presented,
compared and discussed. The main aim of the workshop is to provide
recommendations to hydrologists faced with the problem of design flood
estimation in data-poor regions, while at the same time making
suggestions for implementation in the PUB initiative.

Main Convener :

Andreas SCHUMANN <andreas.schumann@ruhr-uni-bochum.de>

> Ruhr-University Bochum
>
> Institute for Hydrology, Water Management and Environmental Technology
>
> D-44780 Bochum, Germany
>
> Tel +49 234 32 24693 ; Fax +49 234 32 14153

Co-conveners

Dan ROSBJERG <dr@er.dtu.dk>

Environment & Resources DTU, Technical University of Denmark

Building 115, DK-2800 Kongens Lyngby, Denmark

Tel: +45 4525 1449 ; Fax: +45 4593 2850;

Raul LOPARDO Argentina <rlopardo@ina.gov.ar>

Instituto Nacional del Agua

Ezeiza / Bs As /Argentina / CC 46B1802WAA Apto. Eziea

Tel 54 11 4480 0867 ; Fax 54 11 4480 4500

EduardoSavio R. MARTINS <esm9@funceme.br>

*\[Propose: 1 day, identify co-conveners\]*

W#4 WORKSHOP on Andean Glaciology (ICSI)

A first symposium on Andean Glaciology was held in Valdivia, Chile in
2003. It was sponsored by ICSI/UNESCO/FRIEND. There was a broad
consensus that contacts and exchange of information on new developments
in glaciology should frequently be organised. This workshop will be
devoted to recent techniques in glaciological research, exchange of
data, and discussion on theoretical glaciology and its pertinent to the
Andean Cordilleras. An important part of workshop deliberations will be
concerned with the progress of the proposed Andean Glacier Mass Balance
Network within Andean FRIEND.

Main Convener

Jefferson SIMOES <jefferson.simoes@ufrgs.br>

*\[Propose: 1 day, identify co-conveners\]*

# W#5 WORKSHOP on MOPEX Model Parameter Estimation (ICCLAS, IAHS/WMO Working Group on GEWEX, ICSW, ICASVR, PUB)

The 5^th^ MOPEX workshop will present the results and findings of the
4^th^ MOPEX workshop, to be held in Europe in late 2004. This will
involve new, innovative analyses of the science questions and the
application of *a priori* model parameter estimation to a common set of
basins over a wide range of different climatic regimes. This workshop
will also include additional contributions on *a priori* parameter
estimation techniques applied to large-scale basin applications and
specific regional/country applications where both the model developers
(modelers) and users (water managers) are involved. Based on these
experiences, the discussions will be focused and structured to provide
guidance to PUB and MOPEX on a refined set of science issues and provide
a way forward in addressing and resolving these.

Main Convener :

Alan HALL   <hallalan@acr.net.au>

17 Crisp St, Cooma NSW 2630, Australia,

ph/fax +61 2 6452 1920

Co-conveners :

Qingyun DUAN  <Qingyun.Duan@noaa.gov>

**Hydrology Lab - Special Studies, NWS/NOAA, W/OHD12**

**1325 East-West Highway, Silver Spring, MD 20910, U.S.A.**

**Tel: +1 301-713-1018, ext 113 ; Fax: +1 301-713-1051**

Hoshin GUPTA <hoshin@hwr.arizona.edu>

**SAHRA & The University of Arizona, Department of Hydrology & Water
Resources**

**PO Box 210011, Harshbarger - Room 318, Tucson, AZ 85721-0011 USA**

**Tel: +1 520 626 6974; Fax: +1 520 626 7770**

**George LEAVESLEY**

John SCHAAKE <John.schaake@noaa.gov>

Hydrology Laboratory, NOAA/NWS/OHD, W/OHD12

1325 East-West Highway, SSMC2, Rm 7428, Silver Spring, MD 20910, USA

Tel +1 301 713 0640 ; Fax +1 301 713 0963

Murugesu SIVAPALAN <sivapalan@cwr.uwa.edu.au>

> Centre for Water Research, The University of Western Australia,
>
> 35 Stirling Highway, Crawley WA 6009, Australia.
>
> Phone: +61 8 9380 2320; Fax: +61 8 9380 1015

ICSW rep??

*\[Propose: 1 day\]*

W#6 WORKSHOP on Transferring Hydrological Data Across Spatial and
Temporal Scales (ICCLAS, IAHS/WMO Working Group on GEWEX, PUB, ICRS and
other commissions)

A workshop is proposed for the VIIth IAHS Scientific Assembly to be
jointly sponsored and organized by the IAHS-PUB Steering Group and
GEWEX. The title of the proposed workshop is \"Transferring Hydrological
Data Across Spatial and Temporal Scales\". The workshop aims to support
the mandate of the GEWEX Continental Scale Experiments and Water
Resource Application Project (WRAP) and the objectives of the IAHS
Predictions in Ungauged Basins (PUB) initiative. Earlier WRAP workshops
have shown that an important issue for the widespread and effective use
of GEWEX and other global hydroclimatological research results in water
resource management is the specification of predictive uncertainty and
the downscaling of data to a level of detail appropriate to water
resource decision-making. In addition, individual CSEs may use different
approaches to downscaling global data for hydrological model
applications. PUB has committed to reducing the uncertainty of
hydrological predictions for small and intermediate sized basins. The
workshop aims to address these issues by examining state-of-the-art
methodologies available to \"downscale\" the datasets used and generated
by regional and global climate models. It will also assess the
suitability of those methodologies to provide data appropriate for
hydrological analysis and modeling in mesoscale basins and for water
resource decision-making. Diagnostic case studies of the downscaling of
global data for hydrological and water resource applications will be
presented. An important outcome of the workshop will be the
identification of significant research needs and opportunities.

Main Convener:

Lawrence MARTZ, <lawrence.martz@usask.ca>

Professor of Geography and Acting Associate Dean (Science)

College of Arts & Science, University of Saskatchewan

9 Campus Drive, Saskatoon, Canada S7N 5A5

Tel: (306) 966-5667 // Fax: (306) 966-8839

Co-convenors:

Alan HALL <hallalan@acr.net.au>

**17 Crisp Street, Cooma NSW 2630, Australia**

**Tel/Fax +61 2 6452 1920**

**Alain PIETRONIRO <al.pietroniro@ec.gc.ca>**

**Dr Alain Pietroniro, ICRS President**

**National Water Research Institute**

**11 Innovation Blvd, Saskatoon,Saskachewan S7N 3H5, Canada**

**Tel: +1 306 9754394 ; Fax: +1 306 9755143**

Daniel Schertzer, <Daniel.Schertzer@cereve.enpc.fr>

CEREVE ; Ecole Nationale des Ponts et Chaussées ;

6-8, avenue Blaise Pascal ; Cité Descartes ; 77455 Marne-la-vallée
Cedex, France

Tél : +33.1.64.15.36.33 ; Fax : +33.1.64.15.37.64 ;

and Meteo France ;1 Quai Branly 75007 Paris, France

ICSW rep?? (Siegfried to advise please)

*\[Propose: 1 day\]*

> W#7 Land-use and Water Quality Relationships in Ungauged Basins

Basin water quality depends on

(1) the quantity, quality, and state (rain, snow, etc.) of the
    precipitation that falls on the basin,

(2) the way land is used within the basin, and (3) how the precipitation
    recharges groundwater and reaches streams within the basin.

The latter includes :

a.  overland flow,

b.  flow through man-made structures such as sewers, and

c.  flow through the soil and ground-water system.

Each of these pathways has potential impacts on the water quality. In
ungauged basins there are special difficulties because there are no or
very few hydrometric or water quality measurements, yet ungauged basins
are important to downstream users. It is important to identify ungauged
basins that are being developed in a way that is likely to cause
problems to downstream users. This session invites contributions that
investigate the relations between land use and water quality (ground
water and surface water) in ungauged basins, and ways of anticipating
problems. Contributions can focus on any combination of the concerns and
processes involved.

Main Convener :

Mary C. Hill <mchill@usgs.gov>

U.S. Geological Survey

3215 Marine St.   Boulder, CO  80303

tel : 303-541-3014 ; fax: 303-447-2505

Co-conveners

Norman (Jake) Peters <nepeters@usgs.gov>

US Geological Survey

3039 Amwiler Rd., Suite 130

Atlanta, GA 30360-2824 USA

Tel; +1 770 903-9145 ; Fax: +1 770 903-9199.

Kate Heal <k.heal@ed.ac.uk>

University of Edinburgh, School of GeoSciences

Darwin Building, Mayfield Road, Edinburgh EH9 3JU, Scotland, United
Kingdom

Tel: +44 131 650 5420 ; Fax: +44 131 662 0478

*\[Propose: 1 day\]*

# W#8 Workshop on Isotope Tracers and Remote SensingTechniques for Assessing Water Cycle Variability (ICT, ICRS, PUB)

Multi-disciplinary approaches including tracer hydrology, remote sensing
and integrated modelling are required to embrace the challenge of
prediction in ungauged basins (PUB). Stable isotope tracers can often
provide field-based assessments of variability in streamflow sources,
flow pathways, groundwater-surface water interaction, residence times,
evaporation-transpiration partitioning and precipitation-runoff
processes. Remote sensing techniques likewise offer capability for
defining basin morphology, surface state variables, precipitation and
evapotranspiration heterogeneity, as well as recent advances that
establish potential for measuring a wider range of dynamic processes
such as riverine discharge. Integration of tracer and remote sensing
information within GIS, GCM/RCMs, and hydrological models provides an
enhanced perspective of the underlying causes of water cycle variability
as well as serving as a diagnostic tool for evaluating parameterization
schemes and model uncertainty. This workshop will endevour to illustrate
the specific contributions of tracers and advanced technologies for
defining predictability in regional and global water cycles.

Main Convener :

John.J. GIBSON <john.gibson@ec.gc.ca>

National Water Research Institute

W-CIRC, University of Victoria

PO Box 1700 STN CSC, Victoria, BC V8W 2Y2, Canada

Tel: +1 250 472 5137 ; Fax: +1 250 472 5167

Coconveners

Alain.PIETRONIRO <al.pietroniro@ec.gc.ca>

National Water Research Institute

11 Innovation Blvd, Saskatoon,Saskachewan S7N 3H5, Canada

Tel: +1 306 9754394 ; Fax: +1 306 9755143

#### Jeff.J. McDONNELL jeff.mcdonnell@orst.edu

Richardson Chair in Watershed Science

Department of Forest Engineering

Oregon State University, Corvallis, , Oregon 97331-5706,USA

Tel: +1 541 737 49 52 ; Fax: +1 541 737 43 16

*\[Propose: 1 day\]*

W#9 Workshop on PUB Working Groups: Progress in PUB Implementation

IAHS Decade on Predictions in Ungauged Basins (PUB) is aimed at
formulating and implementing appropriate science programmes to engage
and energise the scientific community, in a coordinated manner, towards
achieving major advances in the capacity to make predictions in ungauged
basins.

Recognising the great diversity of interests and expertise of
hydrologists, and practical prediction needs, PUB has adopted a
philosophy of plurality, in terms of applications, hydro-climatic
regions and prediction methods, yet converging with a single-minded
focus on the assessment, and eventual reduction, of predictive
uncertainty. In line with the philosophy of plurality, and with a desire
to energise hydrologists worldwide from the grass-roots level, PUB has
resolved that the main engines of the research activities and progress
will be PUB Working Groups, centred on applications, hydro-climatic
regions, and/or modelling approaches, formed in a self-organising
manner, and cutting across traditional boundaries of specialisation. A
number of Working Groups are already being formed around the world, as
part of this push.

The workshop will give an opportunity for existing Working Groups and
those that in developmental stages to present their scientific aims,
methodologies, and early progress achieved in improved understanding,
predictions and reduction of predictive uncertainty achieved during the
early stages. These will form the basis for intensive discussions with a
view to the sharing of knowledge, data, models and understanding, and
the fostering of national, regional and international collaborations.
Groups and individuals who are part of already active PUB Working Groups
and those being planned are encouraged to participate in the workshop
deliberations.

Main Convener :

Murugesu SIVAPALAN, , <sivapala@cwr.uwa.edu.au>

> Centre for Water Research, The University of Western Australia,
>
> 35 Stirling Highway, Crawley WA 6009, Australia.
>
> Phone: +61 8 9380 2320; Fax: +61 8 9380 1015

Co-conveners :

Stewart FRANKS, <ceswf@atlas.newcastle.edu.au>

Dept Civil, Surveying and Environ. Engng, University of Newcastle

Callaghan, Newcastle New South Wales 2308, Australia

Tel: +61 249 216053 ; Fax: +61 249 216991

Venkat LAKSHMI, <venkat-lakshmi@sc.edu>

Associate Professor, Geological Sciences

University of South Carolina, Columbia SC 29208, USA

Tel +1(803)-777-3552 ; fax +1 (803)-777-6684

Eduardo Mario MENDIODO, <emm@sc.usp.br>

Universidade de São Paulo, Escola de Engenharia de São Carlos

Departamento de Hidráulica e Saneamento

Caixa Postal 359, 13566-590 -- são Carlos -- SP, Brazil

Fax: +55 16 273 9550 ; Tel.: +55 16 273 9542 or +55 16 273 9571

John SCHAAKE, <John.schaake@noaa.gov>

Hydrology Laboratory, NOAA/NWS/OHD, W/OHD12

1325 East-West Highway, SSMC2, Rm 7428, Silver Spring, MD 20910, USA

Tel +1 301 713 0640 ; Fax +1 301 713 0963

S#1 SYMPOSIUM on Sediment Budgets (ICCE)

In 1988, ICCE staged a very successful Symposium on 'Sediment Budgets'
in Porto Alegre, Brazil. Since 1998 there have been two key developments
in the general area of sediment budget investigations. First, there has
been an increasing awareness of the wide-ranging environmental
implications of increased sediment loads in rivers and of the need for
an improved understanding of catchment sediment budgets as a
prerequisite for the development effective sediment management and
control strategies. Second, since 1988 there have been
[major]{.underline} developments in the techniques and models available
for establishing and predicting catchment sediment budgets. The use of
environmental radionuclides, such as Cs-137, Pb-210 and Be-7, as
sediment tracers has, for example, opened up many new opportunities for
investigating catchment sediment budgets. Equally developments in
distributed modelling and the use of remote sensing have proved of great
value in sediment budget investigations. Coming some 17 years after the
Porto Alegre Symposium, this symposium affords a timely opportunity to
review recent progress in the investigation, understanding and modelling
of catchment sediment budgets. Topics to be addressed by the symposium
include:

-   Measurement techniques for establishing catchment sediment budgets

-   Understanding sediment budgets and the key controls on their
    functioning

-   Scale effects on catchment sediment budgets

-   The sensitivity of catchment sediment budgets to environmental
    change

-   Incorporating sediment-associated nutrients and contaminants into
    catchment sediment budget investigations

-   Development of integrated sediment management strategies for river
    basins

-   Modelling and prediction techniques

Main Convener :

Des WALLING <D.E.Walling@exeter.ac.uk>

> University of Exeter, School of Geography and Archaeology
>
> Amory Building, Rennes Drive, Exeter EX4 4RJ, UK
>
> Tel: +44 1392 263345 ; Fax: +44 1392 263342

#### Co-conveners :

#### Arthur HOROWITZ <horowitz@usgs.gov>

U.S. Geological Survey

Peachtree Business Center, Suite 130

3039 Amwiler Road, Atlanta, GA 30360, USA

Tel: +1-770-903-9153 ; Fax: +1-770-903-9199

Newton de Oliveira CARVALHO <Newtonoc@openlink.com.br>

*\[Propose: 3 days\]*

S#2 SYMPOSIUM on Sustainable Water Management Solutions for Large Cities
(ICWRS)

# 

The fast increasing large cities raise many problems for water resources
management. Adequate water supply and drainage management are urgent
tasks, and new solutions are needed to overcome the problems of water
scarcity, deteriorating water quality, lack of sufficient supply
systems, inappropriate handling of wastewater, inadequate storm water
management, flood risk etc. With requirements for sustainability and
integrated water management the relationships between large cities and
the surrounding areas have to be reconsidered. The symposium will
address the complex problems of water management for large cities with
an interdisciplinary outlook taking into account their hydrological,
technical, environmental, as well as socio-economic aspects. The
following problems will be discussed:

\- integrated urban water management;

\- human health, environmental protection, equity, recreation, amenity;

\- unusual sources of water supply including re-use;

\- water demand management;

\- impact of large cities on water quality and quantity of surrounding
areas;

\- planning for and management of hydrological extremes (floods and
droughts).

The symposium will promote the exchange of existing experiences of water
management for, in and around large cities and define the challenges for
hydrology and water management caused by the long-lasting trend to form
extended urbanised areas.

Main Convener :

Dragan SAVIC <D.Savic@exeter.ac.uk>

> Centre for Water Systems, Department of Engineering
>
> School of Engineering and Computer Science
>
> University of Exeter, Exeter EX4 4QF, United Kingdom
>
> Tel: +44 1392 263637 ; Fax: +44 1392 217965

Co-conveners

Juan Carlos BERTONI <jcbertoni@arnet.com.ar>

Universidad Nacional de Córdoba, Instituto Superior de Recursos Hídricos

Pabellón Ingeniería. Box 15, Facultad de Ciencias Exactas, Físicas y
Naturales

5000 -- Córdoba, Argentina

Fax /Tel : + 54 351 4334415

Miguel MARINO <mamarino@ucdavis.edu>

Dept. Land, Air & Water Resources, 139 Veihmeyer Hall (LAWR)

University of California, Davis, California 95616-8628, USA

Tel: +1 530 7520684 ; Fax: +1 530 7525262

Hubert SAVENIJE <hsa@ihe.nl>

UNESCO-IHE

P.O. Box 3015, 2601 DA, Delft, The Netherlands

Tel: +31-15-2151829 ; Fax: +31-15-2122921

*\[Propose: 2 days, identify co-conveners\]*

S#3 SYMPOSIUM on Groundwater Resources Sustainability Indicators (ICWQ,
ICGW, ICWRS, UNESCO-IHP, WWAP, IAH)

> Groundwater indicators are based on monitoring and assessment
> programs. Indicators are helpful for many reasons, e.g. to identify
> the state of the groundwater system, both quantity and quality, and
> its evaluation over time and space. They also facilitate communication
> between policy makers and general public. Indicators should be
> selected and developed which are informative about the threat to
> groundwater systems from the point of view of societal and ecological
> needs. The symposium will promote the exchange and experience from
> river basin studies with groundwater sustainability indicators.
>
> Main Convener ? ICGW
>
> Co-conveners
>
> Joop STEENVORDEN <Joop.Steenvoorden@wur.nl>
>
> DLO, The Winand Staring Centre
>
> PO Box 125, 6700 AC Wageningen, The Netherlands
>
> Tel: +31 317 474200 ; Fax: +31 317 424812
>
> Ricardo HIRATA <rhirata@usp.br>
>
> Eduardo KRUSE <kruse@fcaglp.edu.ar>
>
> Facultad de Cs Astronómicas y Geofísicas (U.N.La Plata)
>
> Paseo del Bosque s/n, CP 1900 La Plata, Provincia de Buenos Aires,
> Argentina.
>
> Fax: (54) 0221-4841383

#### Jaroslav VRBA <javr@mymail.cz>

> *\[Propose: 1 day, identify main convener\]*

S#4 SYMPOSIUM on Dynamics and Biogeochemistry of River Corridors and
Wetlands (ICWQ, ICSW, ICGW)

-   

> The river corridor is a diverse zone in terms of its scale,situation
> and character and is one which is heavily modified by human activity.
> At the end of the spectrum the corridor may comprise a narrow strip of
> riparian vegetation separating the hillslope from the river channel.
> At the other end the corridor may consist of a wide and complex
> floodplain including many units. The function of the corridor is to
> mediate the transport of water and materials to the river network.
> There is a particular need to understand fully the biogeochemical
> processes and transportation involved, including the manner in which
> the river corridor acts as a filter for particulate materials and as a
> sink for nutrients and other materials in soluble form, and how these
> fractions are affected by complex interactions between surface,
> hyporheic and groundwaterflow in this environment.

Hydrology plays a critical role in wetland development and ecosystem
structure and functions. Through interactions with vegetation and soils,
hydrology plays a key role in wetland functions. To understand the
wetland ecosystem functions such as flood control, water quality
improvement, and unique wildlife habitat, basic hydrological information
is needed. Especially, roles and dynamics of groundwater in wetlands are
recognized to be important and sometimes decisive but not necessarily
clarified.

> . The workshop will focus attention on the Dynamics and
> Biogeochemistry of River Corridors and Wetlands with special reference
> to data observation, modelling and attempts to restore these
> environments.

#### Main Convenor :

#### 

#### Louise HEATHWAITE <a.l.heathwaite@sheffield.ac.uk>

> Department of Geography, University of Sheffield, S10 2TN, UK\
> Tel: +44 114 222 7951 ; Fax: +44 114 279 7912

Co-Conveners:

Masaki HAYASHI <hayashi@ucalgary.ca>

Don ROSENBERRY <rosenber@usgs.gov>

Walter COLLISCHONN <collischonn@uol.com.br>

Masato KOBIYAMA <kobiyama@ens.ufsc.br>

S#5 SYMPOSIUM on the Contribution from Glaciers and Snow Cover to Runoff
from Mountains in Different Climates (ICSI)

Mountain snow cover and glaciers contribute considerably to streamflow
in many parts of the world, and modify runoff in quantities, timing and
variability. Their role is emphasized in the light of globally
increasing fresh water demand and potential impacts by future climate
change. The effect of snow and ice on runoff varies between different
climatic regions.\
While, for example, in mid and high-latitude areas seasonal snow cover
exerts a strong control on runoff variations, in low-latitudes, glaciers
provide the most dominant source of water during the dry season.
Consequently, climate change is expected to trigger different responses
in different climate regimes. The workshop is intended as a state of the
art\
presentation on the role of snow cover and glaciers in mountain areas
world-wide as fresh water resource, including all relevant physical
processes and potential responses to future climate change. Issues
encompass experimental, remote sensing and modelling studies on all time
and spatial scales.

Main Convener :

Regine HOCK <regine@natgeo.su.se>

> Associate Professor
>
> Department of Physical Geography and Quaternary Geology
>
> Stockholm University, SE - 106 91 Stockholm, Sweden
>
> Tel:  +46 - 8 - 16 47 84   Fax:  +46 - 8 - 16 48 18

Co-convener : Jefferson Cardia SIMÕES <jefferson.simoes@ufrgs.br>

*\[Propose: 1 day, identify co-conveners,\]*

# 

S#6 SYMPOSIUM on Regional Hydrologic Impacts of Climatic Variability and
Change with an Emphasis on Less Developed Countries (ICCLAS; endorsed by
ICSW, IAMAS, WCRP, CLIVAR, GEWEX plus WMO/UNESCO WCP-Water, HELP)

Climate change threatens global water resource availability. The effects
of natural climate variability and the threat of anthropogenic change
are particularly felt in less developed countries (LDCs) where floods
and droughts result in substantial loss of life and livelihood. Coupled
with the marked decline in observational networks, there is a critical
need for reliable information relevant to hazard mitigation and water
resource management.

This symposium will address the usefulness of hydrological science in
helping decision makers cope with the hydrological impacts of climate
variability and change. Contributions are solicited on the following
topics with an emphasis on (but not limited to) LDCs.

1.  Potential hydrological impacts of future climate including the role
    of natural variability and anthropogenic climate change.

2.  Analysis of historic hydro-climatological variability of relevant
    regions, including model simulations, data and knowledge "on the
    ground".

3.  Problems in translating coupled land-atmosphere model outputs to
    hydrological variables at point, catchment and regional scales.

4.  Hydro-climatically relevant decision-making, risk assessment and
    mitigation/adaptation strategies using uncertain model predictions
    of water resources and hydrological extremes.

Main Convener :

Thorsten WAGENER <thorsten@hwr.arizona.edu>

> The University of Arizona, Harsbarger Building\
> Tucson, AZ 85721-0011 USA\
> Tel: +1 520 626 87 99 ; Fax: +1 520 626 3713

Co-conveners

Stewart FRANKS (University of Newcastle, Australia)
<tewart.franks@newcastle.edu.au>

Dept Civil, Surveying and Environ. Engng, University of Newcastle

Callaghan, Newcastle New South Wales 2308, Australia

Tel: +61 249 216053 ; Fax: +61 249 216991

Hoshin V. GUPTA (University of Arizona, USA) <hoshin@hwr.arizona.edu>

SAHRA & The University of Arizona, Department of Hydrology & Water
Resources

PO Box 210011, Harshbarger - Room 318, Tucson, AZ 85721-0011 USA

Tel: +1 520 626 6974; Fax: +1 520 626 7770

Eva BØGH (University of Copenhagen, Denmark) <evb@geogr.ku.dk>

University of Copenhagen, Institute of Geography

Oester voldgade 10, 1350 Copenhagen K, Denmark

Tel: +45 3532 2584 ; Fax +45 3532 2501

Luis BASTIDAS (Utah State University, USA) <luis.bastidas@usu.edu>

Department of Civil and Environmental Engineering

Utah State Universty

4110 Old Main Hill, Logan, Utah 84322-4110, USA

Tel : +1 435 797 8228 ; Fax : +1 435 797 1185

Carlos NOBRE <nobre@cptec.inpe.br> appointed by IAMAS

? appointed by GWP-Water

Carlos de OLIVEIRA GALVAO <galvao@dec.ufcg.edu.br>

*\[Propose: 2 days, identify a reasonable number of conveners~~\]~~*

S#7 Prediction in Ungauged Basins (PUB): Promises and Progress

Across the globe, water resources and the water environment are under
threat as never before. In river basins everywhere, man\'s activities
have disrupted the natural hydrological and ecological regimes. Impacts
are felt not only locally, but transmitted through land-surface
feedbacks to disturb the climate itself. Water supplies are no longer
secure, flood risk is perceptively increasing, and biodiversity is
threatened. The challenge is to identify appropriate responses to these
threats. Sustainable management policies are needed to provide water not
only for life, health and development, but to prevent further ecosystem
degradation.

In seeking to address these challenging issues across the globe, a major
difficulty is encountered with those basins for which little or no
hydrometric data are available. These basins are predominantly in
developing country regions where climatic variability and basin
development undertaken with limited data have frequently led to the
depletion of water resources, ecosystem degradation, and poor quality of
life. The major challenge for the PUB initiative is to formulate and
implement an appropriate science programme, which can engage the
scientific community in a coordinated and effective way so that a major
advance in predictive capability is achieved. The central theme of the
PUB initiative will be heterogeneity and the uncertainty of hydrologic
predictions in ungauged basins. The overall objective is to constrain
the predictive uncertainty through improved ways to characterise the
effects of heterogeneity, process understanding and through access to
new data resources.

**PUB SSG Convenors:**

**M. Sivapalan, V. Lakshmi, M. Mendiondo, T. Wagener, S. Uhlenbrook, E.
Zehe, D. Schertzer, J. Pomeroy, P. Kumar, Y. Tachikawa, S. Franks, S.
Mackay and P. Burlando**

## 7-1. Model improvements through detailed process studies 

One of the major sources contributing to large uncertainties in
hydrological predictions for ungauged basins comes from inadequate
understanding of important physical processes and how to
represent/parameterize them adequately in a model framework across
different scales. The goal of this session is to bring together
researchers who investigate different aspects of reducing model
prediction uncertainties through better understanding of physical
processes and better incorporation of this understanding into modeling
schemes across different scales, and to report current state-of-art
research results. Presentations are welcome on the following topics (but
not limited to): (1) field measurement oriented studies on physical
processes, (2) theories and/or frameworks that are used to describe the
physical processes mathematically, (3) new process-based strategies on
model structure and framework to reduce uncertainty ranges of model
predictions, (4) illustrations of new ground data sources and data
utilizations to improve our understanding of the physical processes and
model predictabilities; and (5) case studies in various hydroclimatic
zones showing reductions of model uncertainties through detailed process
studies.

Main Convener

Stefan UHLENBROOK, <stefan.uhlenbrook@hydrology.uni-freiburg.de>;

> Institute of Hydrology, Fahnenbergplatz, D-79098 Freiburg, Germany
>
> Tel: +49-761-2033520

Co-convener

Xu LIANG, <liang@ce.berkeley.edu>

> Department of Civil and Environmental Engineering,
>
> University of California, Berkeley, California, USA
>
> Tel: 510-642-2648

7-2. Model evaluation and comparison: uncertainty analysis and
diagnostics

Recent research suggests that the use of an inadequate model structure
can be even more problematic than the use of sub-optimal parameter
values. Additionally, it will often have a considerable effect on
predictive uncertainty.  However, despite these results, model
structural uncertainty has largely been ignored in uncertainty analysis
and it is common to adopt a single model structure with little
justification. This session focuses on the evaluation of hydrological
and environmental models, both individually and in comparison
studies. Papers related to theory and tools for evaluation and
diagnostics are also of particular interest.

        We encourage the submission of results from case studies over a
wide range of modeling objectives (including, but not limited to water
quality, erosion and sediments, floods and water resources, etc.), data
conditions and hydro-climatological regions. There is an urgent need to
improve theory and techniques used in model comparison and evaluation.
Examples of current science questions are: How can new or innovative
data sources (e.g. soft data or tracers) be used in model comparison and
evaluation? What is the effect of differences in scale between observed
and modeled variables when these are used for model evaluation? In how
far do internal model states relate to real world variables? How can
model structural uncertainty be considered when estimating predictive
uncertainty? What evaluation frameworks provide feedback regarding
potential model structural improvement? How can we evaluate the
\'realism\' of a model structure?

Main convener :

Stewart FRANKS, <ceswf@atlas.newcastle.edu.au>

Dept Civil, Surveying and Environ. Engng, University of Newcastle

Callaghan, Newcastle New South Wales 2308, Australia

Tel: +61 249 216053 ; Fax: +61 249 216991

Co-convener:

Thorsten WAGENER, <t.wagener@hwr.arizona.edu>

SAHRA & Department of Hydrology and Water Resources

The University of Arizona, Tucson, AZ85721-0011, USA,

7-3. New data collection approaches and model development

Ungauged basins pose a challenge to hydrological studies as they lack
both calibration and validation data for the use of land surface models.
Therefore, one has to use the satellite data that is available which
describes the aspects/attributes of the basin from a hydrological
perspective. In the recent years, numerous satellite data sets for soil
moisture, surface temperature, vegetation and precipitation have become
available. The development of a new line of research in data
assimilation has brought models and observations closer to each other.
Hydrological models have also become sophisticated to include the inputs
of remote sensing and the algorithms of data assimilation. It is hoped
that this session receive papers on the general topic of utilization of
remote sensing data sets and data assimilation algorithms in
hydrological modeling. This strategy would help in estimation of the
water resources for the ungaged catchment.

Main Convener:

Venkat LAKSHMI, <venkat-lakshmi@sc.edu>

# Department of Geological Sciences;

# University of South Carolina; Columbia SC 29208 ;

# Ph: (803)-777-3552; Fax:(803)-777-6684

# Co-convener :

# 

#  Peter TROCH, <Peter.Troch@wur.nl>

# Hydrology and Quantitative Water Management Group;

# Wageningen University; 6709 PA Wageningen;

# Ph: +31 317 48 43 97 Fax: +31 317 48 48 85

7-4. Complex Systems and Ecohydrology

Traditional hydrologic studies have focused on extreme events - floods
and draughts - as these have serious human and economic consequences.
However, research during the past decade has shown that the entire range
of hydrologic variability in flow, temperature, and habitat plays a
crucial role in the maintenance of ecosystems, particularly those
related to the river environment. The goal of this session will be to
solicit papers on the theme of improving our understanding of the
interaction between hydrologic variability, biodiversity and the
diversity of the abiotic environment, at a variety of spatial and
temporal scales by treating the basin as network of complex systems.
This improved understanding will lead to better prediction of the
anthropogenic impact on the river environment, contribute to sustainable
water resource management policies, and assist in developing better
strategies for stream restoration and naturalization.

Main Convener:

Praveen KUMAR, <kumar1@uiuc.edu>

> Department of Civil and Environmental Engineering, University of
> Illinois;
>
> 205 North Mathews Avenue, Urbana, Illinois 61822; USA\
> Ph +1 217-333-4688; Fax +1 217-333-0687

Co-convener :

D. Scott MACKAY, <dsmackay@buffalo.edu>

> Department of Geography; 105 Wilkeson Quad., University at
>
> Buffalo, Buffalo, NY 14261, USA.
>
> Phone: +1 (716) 645-2722 ; Fax: +1 (716) 645-2329

# 7-5. Nonlinearity, Complexity, Scaling and PUB

The problem of prediction in ungaged basins (PUB) can be defined as the
prediction of flow, sediment and water quality variables at multiple
scales, which is not based on the availability of measured data on these
variables. Although, this problem can be traced back to the foundation
of modern hydrology, it did not yet receive a satisfactory answer.
Indeed, the strong nonlinear interactions between various fields, and
their resulting complexity, in particular their extreme variability over
a wide range of space-time scales have not yet been fully taken into
account. Nevertheless, we have been beginning to uncover a kind of
hidden order when analyzing the scale symmetry (scaling) of the
variability of precipitation and runoff, basin geomorphology and
ecology. This session will be therefore devoted to the latest empirical,
operational and theoretical developments about nonlinearity and scaling
for solving the PUB problem.

Main Convener :

Daniel Schertzer, <Daniel.Schertzer@cereve.enpc.fr>

> CEREVE ; Ecole Nationale des Ponts et Chaussées ;
>
> 6-8, avenue Blaise Pascal ; Cité Descartes ; 77455 Marne-la-vallée
> Cedex, France
>
> Tél : +33.1.64.15.36.33 ; Fax : +33.1.64.15.37.64 ;
>
> and Meteo France ;1 Quai Branly 75007 Paris, France

Co-convener :

Paolo Burlando, <burlando@ihw.baug.ethz.ch>

> Institute of Hydromechanics and Water Resources Management;
>
> ETH Hoenggerberg, HIL G33.1 CH-8093 Zurich, Switzerland
>
> tel.: +41-1-6333812 ; fax: +41-1-6331061

7-6. New Distributed Modelling Approaches and Methods for Testing Models
Against Observations

The prediction of mesoscale ungauged basins or gauged under changing
boundary conditions requires new modelling approaches that address the
multi-scale variability of hydrological processes and are based on
parameters and state variables which are related to measurable
quantities in the field. Current physically based process descriptions
(based on derivates of the Richards and Saint-Venant Equation ) suffer
from the fact that they were developed for the plot- and laboratory
scale. The related model parameters are determined e.g. using \"fist
size\" soil samples. Due to the non linearity of surface and soil water
dynamics simple averaging of these parameters does not yield effective
parameter sets suitable for larger volumes. Because of their data needs,
the application of physically based is restricted to small and very well
instrumented catchments, and even there these models often fail in
describing the most important drainage mechanisms in heterogeneous soils
such as preferential flow or pipe flow. Conceptual hydrological models
on the other hand suffer from the fact that there is no obvious causal
relation between model parameters and observable field quantities. Thus,
the model parameters need to be estimated a posteriori through
calibration, which is neither possible in ungauged basins nor in gauged
basins under change.

This session solicits presentations that address advanced or new ways of
representing hydrological processes in distributed models for the
mesoscale, especially how these processes are affected by the dominating
surface/subsurface heterogeneity. This might include top-down
approaches, bottom-up approaches or a combination thereof, new ways of
describing non-continuous local processes such as preferential flow or
piping as well as new ways of dynamical upscaling to parameterize the
effects of subscale heterogeneity at the meso scale. As the estimation
of model parameters has been a cardinal problem since the last two
decades, these presentations should also outline how the parameters
related might be determined from observable quantities and how we might
assess dynamical measures at the mesoscale that are suitable for testing
these new model approaches, such as statistical/dynamical
uspcaling/downscaling of local/ large scale observations.

Main Convener :

Erwin Zehe, <erwin.zehe@iws.uni-stuttgart.de>

> Institute of Hydraulic Engineering, University of Stuttgart
>
> Pfaffenwaldring 61, 70550 Stuttgart Germany,
>
> Phone; +49-711-685-4703, Fax: +49- 11-685-4681

Co-convener :

Murugesu Sivapalan, <sivapala@cwr.uwa.edu.au>

> Centre for Water Research, The University of Western Australia,
>
> 35 Stirling Highway, Crawley WA 6009, Australia.
>
> Phone: +61 8 9380 2320; Fax: +61 8 9380 1015