水利学报2012，Vol.43Issue(12)：1440-1446,7.
嫩江流域土地利用尺度变化对蒸散发影响研究
The impact of scale change of land use on evapotranspiration in Nenjiang River basin
摘要
Abstract
The results of hydrological study present uncertainty due to the existence of spatial and temporal heterogeneity. Downscaling is usually employed to decrease the impact of heterogeneity which is a function of scale, for example, discretization in hydrological model. However, it is a problem to confirm the smallest scale and how does it impact the results for scale changing. Perfect solutions to the problems above have not yet been found so far. The evapotranspiration and its spatial heterogeneity, distribution patterns were analyzed based on land use data in 2000 in Nenjiang River basin at various grid sizes (5km×5km, 10km×10km and 20km×20km). The results show that there is a similar tendency of spatial heterogeneity in land use type and evapotranspiration at different scales, and a smaller influence of scale change on the evapotranspiration, by which the center of distribution patterns moving to the type of land use with larger area.关键词
土地利用/蒸散发量/网格大小/空间异质性/空间分布Key words
land use/evapotranspiration/grid size/spatial heterogeneity/spatial patterns分类
农业科技引用本文复制引用
袁勇,严登华,贾仰文,胡东来..嫩江流域土地利用尺度变化对蒸散发影响研究[J].水利学报,2012,43(12):1440-1446,7.基金项目
国家自然科学基金 （）
国家创新群体项目 （）
国家“973”项目 （）
