基于VIC模型的老挝南乌河流域水资源量评估

老挝正在积极参与澜湄水资源合作研究工作,水文实测数据短缺是制约水资源规划工作的现实问题。以老挝南乌河流域为例,采用流域地形、土壤、植被以及气象驱动等数据资料,通过建立流域分布式水文模型——VIC模型对径流进行模拟,以分析水资源量的时空分布规律。模拟结果表明:模型在对南乌河流域日、月尺度的水文过程模拟中表现出了较好的适应性,南乌河流域内的水量主要靠降水补给,径流的地区分布基本上与降水的地区分布一致,总的趋势是由流域上游向流域下游递减,径流系数的趋势也是由流域上游向流域的下游递减。研究成果可为无资料地区的水资源规划方案的制定及水资源量分析提供参考与借鉴。

Evaluation on water resources in Nam Ou River basin of Laos based on VIC model

Laos is actively participating in the Lancang-Mekong water resources cooperation project, however insufficient hydrological data has been a practical problem for its water resources planning. Taking the Nam Ou River basin as example, we collected information about the terrain, soil, vegetation and meteorological conditions of the basin, and established a distributed hydrological model (VIC model) for runoff simulations. We also analyzed the spatial distribution of water resources based on the collected data . The results indicate: ① VIC model is adaptable in the modeling of hydrological process on daily and monthly scales;② precipitation is the major water source for the basin;③ geographic distribution of runoff is in accordance with that of the precipitation, both follow a decreasing trend from upstream to downstream basin, and the same trend for the runoff coefficients.