Journal
HYDROLOGICAL PROCESSES
Volume 22, Issue 12, Pages 1731-1746Publisher
WILEY
DOI: 10.1002/hyp.6740
Keywords
land cover and use change; runoff and stream-flow; south-east Asia; Mekong River basin; macro-scale hydrologic model; soil moisture antecedent conditions
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In this article the relative roles of precipitation and soil moisture in influencing runoff variability in the Mekong River basin are addressed. The factors controlling runoff generation are analysed in a calibrated macro-scale hydrologic model, and it is demonstrated that, in addition to rainfall, simulated soil moisture plays a decisive role in establishing the timing and amount of generated runoff. Soil moisture is a variable with a long memory for antecedent hydrologic fluxes that is influenced by soil hydrologic parameters, topography, and land cover type. The influence of land cover on soil moisture implies significant hydrologic consequences for large-scale deforestation and expansion of agricultural land. Copyright (c) 2007 John Wiley & Sons, Ltd.
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