Country Report:GEOSS/AWCI

MAE WANG BASIN
Flood Early Warning SystemforMae Wang Basin

THADA SUKHAPUNNAPHANTHAILAND

Beppu, Japan,3 December 2007

Country Report:GEOSS/AWCI

MAE WANG BASIN

THADA SUKHAPUNNAPHANTHAILAND

Beppu, Japan,3 December 2007

FLOODS in MAE WANG BASINIndex
1.

Basic Information of the basin

2.

River Monitoring and Flood Warning

3.

Warning and Information dissemination channels

1. Basic Information of the basin

Factors of flood in
Northern Thailand.
Flash flood andoverbank flow inundation
trend to occur mostly inthe wet season from May
to October of each year.
When there iscontinuous heavy raininfluenced by southwest
monsoon from IndianOcean, tropical storm fromSouth China Sea, lowpressure trough or frontal
encounter of differentpressure air masses.

1. Basic Information of the basin

Location and Physiologicalcharacteristics
PingBasin
Mae WangBasin
ChiangMai

Mae Wang is sub-basinof Ping Basin located in Mae
Wang district of Chiang Mai
between latitude 18º 33' N.– 18º
46' N. and longitude 98º 31' E –98º 47' E decline from west toeast. Total basin area is about
503 km2.
Mae Wang River starts from Doi
Khun Wang in Inthanon Range on
the southwest of the basin withthe length of -km. runs eastward
to join Mae Khan river and thenwith Ping River in Doi Loh district.
Main tributaries are Mae Tian,
Mae Sapok, Mae Puai and HuaiYuak.

1. Basic Information of the basin

Doi Inthanon

Topography of Mae Wang Basin

Khun Wang
MaeWang
Mae Waang SM

aeikpoSaeTMaianMaePuai

Chom Thong
Sa Moengaki YuHuaP.82

eWMaganBan Sob WinHang Dong

P.84

Ban Phan TonNSan Pa Tong

Flooded area

1. Basic Information of the basin

Frequently flooded area

B. Pang Khilek

B. Pa Ka
B. Phan Ton
B. Nong Yen

B. Boon Yuen

1. Basic Information of the basin

FLOODS RECORD OF MAE WANG BASIN 1995-2003

ราฟระดับน้levelาํ สูงสุด at Mae Wang
Maximum of daily กwaterสถานีP.84 น้าํ แมวาง บานพันตนอ.แมวางจ.เชียงใหม
6.00
ระดับน้าํ -เมตร (รสม.)

5.00

2006
ป2549Riverระดับตbankลิง่ line
2007ป2550ระดับตลิง่ 4.00เมตรRiver bank line

4.00
3.00
2.00
1.00
0.00

1 6 11 1621 2631 5 10 15 2025 30 4 9 14 1924 29 4 9 1419 2429
Dayวันที่
Julyกรกฎาคม

AugustสิงหาคมSeptemberกันยายนตุลาคม
October

2. River monitoringand Flood Warning system

2. River monitoring and Flood Warning system: Water level correlation and time lag.

Manual measurement
Discharge and water level measurement byhydrological stations

Station P.82 Ban Sob Win

P.82

P.84

Hydrology and Water management Centerfor Upper Northern Region

Station P.84 Ban Phan Ton

2. River monitoring and Flood Warning system: Water level correlation and time lag.

P.82

WATER LEVEL CORRELATION and TIME LAG OF MAE WANG RIVER

between station P.82 and P.84
4.15 m.

P.84

4.00 m.
3.80 m.

Critical level5.10 m.
3.90 m.
4.00 m.

P.82 B. Sob Win
Mae Wang Dist. Chiang Mai

P.84 B. Phan Ton
Mae Wang Dist. Chiang Mai

18 km. distance2. River monitoring and Flood Warning system: Water level correlation and time lag.

Mae Wang

Water level time lag of Mae Wang Riverbetween station P.82 and P.84
P.84 4.65 m. 08:00 A.M.
P.82 4.15 m. 04:00 AM.

Bank level of P.84

P. 82
Ban Sob Win,
Mae Wang Dist.

4 hours time lag
Distance
18 Km.

P.84
Ban Phan Ton,
T.Thung Pi

Water Level at P.82
Water Level at P.84

2. River monitoring and Flood Warning system: Water level correlation and time lag.

P.84 water level (m.)

Water level correlation between P.82 and P.84

P.82 water level (m.)

2. River monitoring and Flood Warning system: Water level correlation and time lag.

Flood
Criticalrange

NormalRiver status indicated by colors on the staff gage

1 sources
2. River monitoring and Flood Warning system: Involved information

Radar-TMD
Monitoring hourly rain cloud
distribution by the Radar
images from TMD

2. River monitoring and Flood Warning system: Telemetry and automatic warning system

Distributed Hydrological Model

43.0 36.1 35.1
33.0 34.9 35.0
41.8 36.2
33.5 34.6 3
1.2 32.4
40.8 36.2 33.6
Basin rainfall data
32.7 33.1
32.1
33.5
31.1 30.4
31.2
30.6 33.0
Flow

Rain gage net work

OutletTimeTime series

2. River monitoring and Flood Warning system: Telemetry and automatic warning system

Pilot project GEOSS telemetry in Mae Wang Basin by the cooperation ofHydrology and Water Management Center and the University of Tokyo2. River monitoring and Flood Warning system: Telemetry and automatic warning system

Pilot project GEOSS telemetry in Mae Wang Basin by the cooperation ofHydrology and Water Management Center and the University of Tokyo

Tele-super sites

14 stations = Mon Ya Tai, Sob Win,Huai Tong and Khun Wang

3915712134141610Tele-rain sites

11210 stations = Huai Yuak, Phan Ton,Huai Sai, Huai Khao Leeb, NongTao, Doi Inthanon, Wang Pha Poon,
Mae Mood, Huai Yao and Pong Noi
Kao

586Rain gage2 Stations = Khun Mai and Puai Nua

2. River monitoring and Flood Warning system: Telemetry and automatic warning system

TELE-SUPER SITES

NO.1 Mon Ya Tai

NO.2 Sob WinInstrumentation : Tel-super site

Data logger

Wind Speed & Direction
2.7ม.
Air Temperature &Humidity

2.0 ม.
Short & long-waveradiation

Rain Fall

Air pressure
in Data logger box

1.0 ม.

-5 cm.

-10 cm.
-20 cm.
-40 cm.
Ground Water Level

NO.4 Khun Wang
NO.3 Huai Tong

River Water Level: Soil Temperature: Soil Moisture

Data is logging every 5 seconds andrecorded by averaging every 10 minutes.
Tel-super system can storage data for 6month, Tel-rain system can storage datafor 1.5 month.

GSM modem
GSM is easily able to connect line
directly by dial-up connection, although
GSM (9.6 kbps) is low-speed access thanGPRS (115 kbps).

Data transfer every 1 hourfrom all observation sites

2. River monitoring and Flood Warning system: Telemetry and automatic warning system

Site description 2TELE-RAIN SITES

NO.5 Huai Yuak

NO.8 Huai Khao Leep

Instrumentation : Tel-rain site(with river level observation)

NO.9 Nong Tao
NO.6 Phan Ton

NO.11 Wang Pha Poon

NO.13 huai Yao

NO.14 Pong Noi Kao

Instrumentation : Tele-rain site

NO.12 Mae Mood
Air TemperatureAir Temperature
2.0 m.

RainfallData logger box

2.0 m.
1.0 m.

1.0 m.

Rain Fall
Data logger box-5 cm.
: Soil Temperature

Water TemperatureRiver Water Level

2. River monitoring and Flood Warning system: Telemetry and automatic warning system

Telemetric project GEOSS :Types of survey and data collecting of 16 sites

2. Warning and Information dissemination channels:

http://geoss.tkl.iis.u-tokyo.ac.jp/geoss
datatermsubmitsite

3. Warning and Information
dissemination channels

2. Warning and Information dissemination channels:

2. Warning and Information dissemination channels:

Instrumentation : Data acquisition and Telemetry system

GEOSS Data Server@RID Center 1

GEOSS Data Archive System@Univerisuty of Tokyo

Conclusion
To improve Maewang Project We need…

Training of flood modelling
Flood hazard map training

Thank you foryour attention