摘要
利用遥感图像、1980年和2000年Landsat TM影像数据,用分类统计方法、分段比重百分比指标法分析渭河流域土地利用及覆被变化空间分布和转移情况。以清源河小流域为研究实例,用分类水文模型对其进行了模拟。结果表明,黄土高原土地利用及覆被变化对流域年径流有显著影响,即:对径流的影响表现为季节性特征明显;对暴雨形成的洪水过程有延时效应。
Based on the remote sensing image and landsat TM image data of 1980 and 2000,the spatial distribution and transfer of the land-use and the land-cover change in Weihe River Basin are analyzed with the classified statistic method and sectional proportion percentage index method.Taking Qingyuanhe River Catchment as a study case,it is simulated by a classified hydrologic model.The result shows that the change of land-use and land-cover within the area of the Loess Plateau has a significant impact on the annual basin runoffs therein;i.e.the impact on runoff represents an obvious seasonal feature,while the impact on the flood process created by rainstorm has a delay effect as well.
出处
《水利水电技术》
CSCD
北大核心
2012年第4期5-10,共6页
Water Resources and Hydropower Engineering
基金
国家自然科学基金重点项目(40930634)资助
