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Poster (Scientific congresses and symposiums)
MAIN EXISTING IRRIGATION SYSTEMS IN THE SUB-BASINS OF THE TONLE SAP LAKE OF CAMBODIA
Ly, Sarann; Someth, Paradis
2008the Third International Symposium on Sustainable Development in the Mekong River Basin
 

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Keywords :
irrigation system; Tonle Sap Lake; water resource development
Abstract :
[en] The Tonle Sap Lake and its complex tributaries are the main water body and water courses of Cambodia. The catchment area of the lake is generally divided into twelve major sub-basins. The tributaries of the lake have great potential of water resources for agricultural and industrial development. The river networks and existing irrigation projects are not well surveyed. A survey trip was conducted around the lake. The aim of this trip is to understand the river networks and identify main existing irrigation systems in the sub-basins of the Tonle Sap Lake. In this poster, we are mainly focused on the existing irrigation schemes. The schemes are classified into five categories. (1) “Surface runoff collector”: it is formed by a small dike to collect surface runoff from upstream part. The water collected is used as a supplementary water source for rainy season cultivation and for irrigating a small area of dry season cultivation. (2) “Dam reservoir”: a dam is put in place on a river to store the river runoff during the rainy season and the water stored is supplied to a command area in the dry season. (3) “Indirect diversion”: it is characterized by a diversion structure and a storage reservoir. Water is diverted and stored in the reservoir during the rainy season and used for dry season cultivation. (4) “Direct diversion”: characteristic of this type is similar to that of the indirect diversion, except the river water is diverted directly to irrigated area without storing in a reservoir. (5) “Flood storage”: it is generally developed in the floodplain of the Tonle Sap Lake. A ring dike prevents floodwater from entering the reservoir and rainy season rice is grown inside the dike. After harvesting, the gates on the ring dike are opened to receive floodwater. The water is stored inside the dike for cultivating dry season rice outside the dike. This study found that there are only small-scale irrigation schemes developed around/in the Tonle Sap Lake. The water resources of this lake have not been effectively used.
Disciplines :
Earth sciences & physical geography
Agriculture & agronomy
Author, co-author :
Ly, Sarann ;  Université de Liège - ULiège > Doct. sc. agro. & ingé. biol.
Someth, Paradis
Language :
English
Title :
MAIN EXISTING IRRIGATION SYSTEMS IN THE SUB-BASINS OF THE TONLE SAP LAKE OF CAMBODIA
Publication date :
11 September 2008
Event name :
the Third International Symposium on Sustainable Development in the Mekong River Basin
Event organizer :
Japan Science and Technology Agency
Event place :
Khon Kean City, Thailand
Event date :
11-12 September 2008
Audience :
International
Funders :
CREST-JST
Available on ORBi :
since 08 August 2011

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