基于GIS的黄土丘陵沟壑区土壤水分模型研究

Soil moisture model for loess hilly region based on GIS

水分是黄土高原丘陵沟壑区作物生长的关键因素。本文在假设的理想条件基础上,在地理信息系统技术支持下,建立了黄土丘陵沟壑区基于土壤侵蚀和地块条件下主要耕地类型的土壤水分模型,并以晋西离石王家沟小流域为例进行了验证,模拟值与实测值误差率的绝对值约在20%以内,表明该模型可以应用在黄土高原土壤水分的动态变化研究中。

Based on a series of ideal conditions and GIS,the soil moisture models for different types of cultivated land in loess hilly region are established,in which the moisture loss due to soil erosion is taken into account.The observation data obtained from Wangjiagou watershed are used to verify the validity of the models.The comparison shows that the maximum absolute relative error of the simulation is less than 20%.