Cambodia -200905

< Last Update: 19 Feb. 2013 >

SAFE Prototyping Status: June 2009 - June 2011 <Completed>

Water Cycle and Agricultural Activities during the Post-Monsoon Season in the Stung Sangker River Basin and Wider Area in the Western Cambodia

Period

June 2009 ~ June 2011

The western Cambodia is known to be the most productive granary in this country. Since most of the agricultural lands in this country are rain-fed, most of the crops are grown during the rainy season. However, even during the dry season, they grow some crops by using the available small amount of water. Under the monsoonal climate with distinct rainy and dry seasons, rainfall in the dry season is, although its amount is small, very important for the local water use. Through the previous study and the interviews of the local residents, the post-monsoon rainfall is suggested to be prevailing in the western Cambodia.
To provide usable information for the agricultural activities in the western Cambodia by improving understanding of the mechanisms and various phenomena behind the unique post-monsoon water cycle, that benefits the prevailing rain-fed rice production in that area.

Participants

(1) Prototyping Executor

Mr. So Im Monichoth, Deputy Director
Department of Hydrology and River Works (DHRW) & Department Of Meteorology (DOM), Ministry Of Water Resources And Meteorology (MOWRAM), Cambodia

(2) Technical Supporter

University of Tokyo

(3) Data & Application Provider

a) Satellite Data

- JAXA: TRMM, PALSAR, AVNIR-2, MODIS, AMSR-E

b) Other Data

- Department of Hydrology and River Works (DHRW) and Department Of Meteorology (DOM): Operational Rainfall, River Discharge, Automatic Weather Station (AWS) Data, and other local information

- The University of Tokyo: Surface Flux, Soil Moisture, Soil Temperature, AWS, Radiosonde, and Rainfall

c) Model or Tool

- The University of Tokyo: Numerical Atmospheric Model (ARPS-SiB2), Rainfall-runoff Model (WEB-DHM), Land Data Assimilation System (LDAS-UT)

Study Area

Western Cambodia

Study Area (Western Cambodia) of "Water Cycle and Agricultural Activities in Cambodia as a SAFE prototype, June 2009 ~ June 2011"

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Developed System / Application

Flow Chart of Developing System and Application

Final Results

(1) Method

Soil Moisture Observation by PALSAR

Soil Moisture Observation by PALSAR, Methodology

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Land Data Assimilation System by using AMSR-E

Land Data Assimilation System by using AMSR-E

(2) Soil Moisture Estimation

Soil Moisture Estimation by PALSAR

Soil Moisture Estimation by PALSAR: Results of Soil moisture estimation & Maps

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(3) Better Understanding of Water Cycle Processes

Better Understanding of Water Cycle Processes

(4) Capacity Building

Training of data collection and data processing for government staffs in Cambodia

Capacity Building: Training of data collection and data processing for government staffs in Cambodia

In-situ / Validation Data

Data of rain gauges

(1) Place and Date Acquired Data

Place and Date Acquired Data: Existed raingauge before SAFE and Installed raingauge during SAFE in Western Cambodia (Oct. 2009- )

Western Cambodia (Oct. 2009- )

(2) Type of Parameter

Rainfall

In-situ observation for soil moisture

(1) Place and Date Acquired Data

Several points in Western Cambodia (Oct. 2009- )

(2) Type of Parameter

Soil moisture

Field survey for soil moisture

(1) Place and Date Acquired Data

A part of large paddy field located in a suburb of Battambang: 16 points with 25m intervals (18 Feb. 2010)

(2) Type of Parameter

a) Volume fraction of soil moisture (vol.)
b) Standard deviation of surface height (cm)
c) Surface correlation length (cm)

Surface correlation length (cm): Spatial distribution (Observed soil moisture and Estimated soil moisture)

Status of Utilization

(1) Outreach Activities

a) To farmers & local people

- Explanation of our project (why we observe soil moisture & rainfall, etc.)
- Interviews on agricultural water use and rice production

b) To Dept. of hydrology and river works &Technical Service Center, MOWRAM, Cambodian Agricultural Research and Development Institute, JICA

- Capacity building on maintenance of equipments, data collection & handling, quality check of data (to MOWRAM)
- Introduction of the project
- Discussion for the future further cooperation

(2) Stakeholder Meeting

Photo: Stakeholder Meeting on 4th May, 2012

(3) SAFE Prototype Continuation

This prototype is continued to conduct in second stage of SAFE prototype toward use by agricultural farmer.