DIEX-Flow

Ver.2.0
2015/9/1
Release!

Evolve River Discharge Measurement

Software based on DIEX method forriver velocity inter/extrapolation & river discharge
Convert “Point” & “Line” velocity data
to “Cross-sectional” velocity data
Point or Line velocity measured by velocimeteris interpolated and extrapolated over a crosssection with the proper physical backgroundby using DIEX (Dynamic Interpolation andExtrapolation) method.

“Point” or ”Line” velocity data
at everywhere“Point” or ”Line” velocity “Cross-sectional” velocity withobserved in field
the proper physical background

High accuracy

Applicable conditions

Extensible

According to the precise verification
using ADCP, evaluation error ofdischarge is less than 5% on average.

DIEX method, which interpolate and extrapolate
the velocity based on the dynamics balance inthe cross-section, can calculate discharge withhigh accuracy even if the missing occurrs, orriver bed shape is complicated.

DIEX-Flow does not matterthe type of velocimeter.

Reference・ Nihei, Y.& Kimizu, A. : A new monitoring system for river discharge with H-ADCP measurements and river-flow simulation, Water Resour. Res., 44(2008)
W00D20,doi:10.1029/2008WR006970．

DIEX-Flow ver.2.0
for all “Point” & “Line” velocimeters
DIEX-Flow ver.1.0 was only applicable tosurface velocity data.
Now, in order to expand the scope andapplication, DIEX-Flow ver.2.0 supports all
point & line velocity data at everywhere.

STIVRadio current meter

Float

Price current meter

Major applicable velocimeters with DIEX-Flow ver.2.0

DIEX-Flow

Evolve River Discharge Measurement

Smoothly – input, analysis, and display the results
Input file creationCalculation

Display the results

DIEX-Flow support you to create
input files.
Input data will be visualized, and
it is easy to confirm theobservation data & setting status.

Start calculation for velocity
inter/extrapolation and discharge.

DIEX-Flow visualize automatically

86420-104090

140

190

1098765
4
32
10Obs.

1064
20
40

90

140

190

Spanwisedirection [m]
横断距離（m）

Visualize the spatial distribution of
the various observed values and calculation settings
Dead zoneObs.
Water level
River bed

Visualize the cross-sectional velocity
Elevation [E.L.m]

Plant
Elevation [E.L.m]

128-10Spanwisedirection [m]
横断距離（m）

Depth-averaged velocity
evaluated by DIEX method

Elevation[E.L.m]標高（E.L.m）

水深平均流速（m/s）
Depth-averaged
velocity [m/s]

水表面流速（m/s）
流速観測値
Observed
velocity [m/s]Check the lateral profile of calculated velocity

Check the lateral profile
of observed velocity

10- Cross-sectional velocity distribution- Lateral profile of depth-averaged velocity- Time series of discharge

Roughness coef.
Spanwise direction[m]Spanwise direction [m]-Visualize input dataError check etc…

-Cross-sectional velocity distribution
Lateral profile of depth-averaged velocity
Time series of discharge etc…

Operating environment
PC

Windows7/8/8.1 installed Microsoft
office2010 or moreInterfaceUSB port

CPU

1GHz or moreRAM

2GB or more

Disk space

600MB or more

Screenresolution

1024×576 or more

Language

Japanese only

Pacific Consultants Co., Ltd. Dept. of water resources & Hydro. Eng.
3-22, Kandanishiki-cho, Chiyoda-ku, Tokyo 101-8462, Japan
URL：https://www.diex-flow.pckk-service.jp/Approval No.：64-07-0036
Copyright © Pacific Consultants Co., LTD. All Rights Reserved.

Development/Sales

Pacific Consultants Co., Ltd.

Joint Development

Tokyo University of ScienceAgency

Dept. of water resources & Hydro. Eng.

Yotsuba system development INC.