不同土地利用情景下岩溶水文水资源的响应研究

以贵州省普定县后寨河流域为例,采用基于落水洞的岩溶半分布式水文模型模拟了不同水平年在不同土地利用情景假设下的流域年、月径流量变化。结果表明,极端土地利用情景下各水平年在极端水田和极端林地情景下年总径流量明显减少,而极端裸岩使年总径流量增加相对不是很明显;对于相同的降雨条件,3种极端土地利用情景下模拟得到的流域年总径流量大小排列顺序为：裸岩〉林地〉水田;年总径流量在流域优化空间情景假设下较现状模拟值将减少,这主要是因为林地面积增加,裸岩面积减少;在极端情景假设和空间优化配置情景下土地利用变化对径流量的影响主要发生在夏、秋季节,对冬、春季影响较小;而且流域的水文响应敏感度都表现为：枯水年〉平水年〉丰水年。

Karst Hydrologic Response to Landuse and Land Cover Changes Scenarios——A Case Study of Houzhai River Basin

Based on the technology of remote sensing and geographic information systems,a karst sinkhole-based semi-distributed hydrological model was applied to study the impacts of various land use scenarios on runoff and hydrological processes within different years in the Houzhai River Basin located in Puding County,Guizhou Province.The results show that compared with the original land use type,forest and paddy field reduce substantially the runoff and the bare rock scenario increases the runoff slightly but not s...