Investigation of the Mekong River basin hydrology for 1980–2000 using the YHyM
Investigation of the Mekong River basin hydrology for 1980–2000 using the YHyM
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DOI：
10.1002/hyp.6934
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发表时间：
2008-04
影响因子：
3.2
通讯作者：
H. Hapuarachchi;K. Takeuchi;Maichun Zhou;A. Kiem;M. Georgievski;J. Magome;H. Ishidaira
中科院分区：
文献类型：
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作者：
H. Hapuarachchi;K. Takeuchi;Maichun Zhou;A. Kiem;M. Georgievski;J. Magome;H. Ishidaira
本研究使用基于网格的分布式水文模型Yamanashi水文模型(YHyM)研究了1980-2000年间湄公河流域的水文。使用不同位置的观测数据对模型的性能进行了评估，结果证明了模型的物理合理性。分析了流域土壤水分、地下水饱和亏、径流、降水、蒸散量等气候水文特征的季节变化。根据模拟结果，值得注意的是，在模拟期间，流域的降水、流量和土壤水分状况没有明显的趋势，尽管有一些似乎是自然的季节变化。而对径流降水弹性(E)的分析表明，各子流域的E值均大于1，说明年降水量x%的变化可以引起年径流x%的变化。此外，还对长期综合干旱的流域水文响应进行了分析，结果表明湄公河流域基流的重要性。版权所有©2008 John Wiley&Sons，Ltd.
This study investigates the Mekong River basin hydrology for the 1980–2000 period using a grid‐based distributed hydrological model called Yamanashi Hydrological Model (YHyM). The performance of the model is evaluated using data observed at different locations and the results justify the physical soundness of the model. The seasonal variations of climatic and hydrological characteristics of the basin such as soil moisture, ground water saturation deficit, runoff, precipitation, evapotranspiration, etc. are analysed. On the basis of the simulated results, it is noticeable that there is no significant trend in the precipitation, discharge, or soil moisture state of the basin during the simulated period, though there are some seasonal variations which seem to be natural. However the analysis on the precipitation elasticity (E) of the river flow shows that the E values for all sub‐basins are greater than unity, which indicates that x% change in annual precipitation can cause > x% change in annual river flow. Further the basin hydrological responses are analysed for a long term synthetically‐induced drought the results of which show the significance of the base flow of the Mekong River basin. Copyright © 2008 John Wiley & Sons, Ltd.