학술논문
Assessment of water resources to support the development of irrigation in northwest Cambodia: a water budget approach.
Document Type
Article
Source
Subject
*AGRICULTURE
*FOOD supply
*WATER supply
*IRRIGATION management
*WATER management
*RAINWATER
*GROUNDWATER management
*NATURAL resources
*MANAGEMENT
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Language
ISSN
0262-6667
Abstract
Water availability is the primary constraint on the improvement of food security in rural areas in northwestern Cambodia. A 4-year study was carried out in the upper Stung Sreng watershed to assess water resources. Four sub-watersheds with different land cover types, ranging in size from 1.5 to 185 km2, were monitored using dedicated weather stations and rain- and streamgauges. Geophysics and observation boreholes were used to characterize aquifers. Rainwater is mostly split into evapotranspiration (annual mean of 54% rainfall) and streamflow components (49%), because groundwater recharge is low (1%). Thus, rainwater and streamflow are the main sources for irrigation development. Groundwater can be used only in specific locations for low water-demand crops. A total of 186 household ponds and three village-scale dams were built and 31 wells were installed. The household pond was determined to be the best solution for irrigation development because of its simple management.EDITOR A. Castellarin ASSOCIATE EDITOR M. Piniewski [ABSTRACT FROM AUTHOR]