苏子河流域土地利用变化对大伙房水库水量的影响

Effects of Land Use Change on Water Quantity of Dahuofang Reservoir in Suzi River Basin

土地利用变化影响着地表径流,分析其变化规律与驱动力有利于实现土地资源与水资源的合理利用。本研究以大伙房水库上游苏子河流域为研究对象,运用转移矩阵分析法、相关分析法等分析方法,评估了气候因素、人为因素及土地利用变化对大伙房水库水量的影响,并主要从土地利用角度进行了分析,探讨水库水域面积增加的原因。结果表明:2000—2020年,水库水域面积呈逐年增加趋势,流域内最主要的两种土地利用变化为林地面积增加、农田面积减少,且两者均对流域产水量起到正效应;同时,气候因素的变化也对水库水量的增加起到正效应。

Land use change affects the surface runoff,and analyzing its change law and driving force is helpful to realize the rational utilization of land resources and water resources.Taking the Suzi River basin in the upper reaches of Dahuofang Reservoir as the research object,this study evaluates the effects of climate factors,human factors and land use change on the water volume of Dahuofang Reservoir by using transfer matrix analysis and correlation analysis methods,and discusses the reasons for the increase of water area of the reservoir mainly from the perspective of land use.The results show that the area of reservoir water increased year by year from 2000 to 2020,and the two main land use changes were the increase of forest area and the decrease of farmland area,both of which had positive effects on the water yield of the basin.At the same time,climate change also had a positive effect on the increase of reservoir water quantity.