摘要
基于水文观测的径流和输沙量数据是区域水土流失定量评价的基础数据。宏观性的研究需要把点状的水文数据转换为所代表面内的信息。利用已经公开刊印的全国水文数据,通过划分水文计算单元,水文表格数据与计算单元图的链接,流域汇流关系确定和径流泥沙的平衡计算,得到各评价单元的径流量和输沙量数据,建立了全国单元空间水文数据库,为以后的空间分析提供了数据基础。最后以1955年水文计算为例,对全国单元水文空间水文计算数据库应用进行了初步分析。
Runoff and sediment data from hydrological stations provide the database for studying regional soil and water loss. Yet upscaling of these point data is needed to represent the regional area. Based on published hydrological data, runoff and sediment were calculated for evaluating units by dividing the study area into hydrological polygons, combining hydrological data with the hydrological polygons map, setting up the accumulative relationship between subcatchments and validating the runoff and sediment data. A national spatial hydrology database is built to assist spatial analysis. A preliminary application of the database is demonstrated by an example using data from 1955.
出处
《水土保持通报》
CSCD
北大核心
2003年第3期55-59,67,共6页
Bulletin of Soil and Water Conservation
基金
中国科学院知识创新重要方向项目:黄土高原水土保持的区域环境效应(KZCX3-SW-421)
