基于GIS的流域土壤水分补给量的模拟研究  

Modeling of soil water replenishment in catchments based on GIS

作　　者：牛振国[1] 李保国[1] 张凤荣[1] 

机构地区：[1]农业部土壤和水重点开放实验室中国农业大学资源与环境学院

出　　处：《水利学报》2003年第2期73-77,82,共6页Journal of Hydraulic Engineering

基　　金：国家自然科学基金重大项目资助(39990490)

摘　　要：地理信息系统(GIS:GeographicalInformationSystem)的栅格数据模型是进行水文分析较常用的方法之一,它强大的空间分析功能非常利于构造分布式模型。土壤水分的空间分布与地形、土壤和土地利用等因子密切相关。本文利用GIS栅格数据模型构建了流域累积土壤水分补给量的分布式模型,并应用于鄂尔多斯高原的考考赖沟流域。结果分析表明,模型能够合理地表达累积土壤水分补给量的空间变化规律。这对于我国半干旱山地丘陵地区的土地利用结构的空间安排、植被生态建设与恢复具有重要意义。The Grid data model, which has the capability of space modeling, is one of the effective methods for hydrological analysis. The spatial distribution of soil water is closely related to topographies, soil and land use, etc. By using the grid data model of Geographical Information System (GIS), the distribution model of accumulated soil water in catchments was developed and applied in the Kaokaolaigou river basin of the Erdos plateau. A high space correlation between soil water replenishment and NDVI (Normal Difference Vegetation Index) was found. Results show that the model computation reflects the spatial distribution of soil water replenishment and can be used in semiarid areas.

关 键 词：栅格数据模型 鄂尔多斯 地理信息系统 

分 类 号：S152.7[农业科学—土壤学]