摘要
利用卫星遥感技术，结合地面观测，确定植被盖度、裸地占地率和土壤质地３ 项因子为沙尘暴多发区风蚀荒漠化土地现状程度评价指标，并给出程度评价模型；在此基础上，考虑到非荒漠化土地及各程度荒漠化土地在面积上的组成比例，给出区域性土地风蚀荒漠化总体水平评价模型；并通过对内蒙古赤峰市及阿拉善盟两地区的土地风蚀荒漠化总体水平评价验证，证明此模型可作为沙尘暴多发区任意大小区域土地风蚀荒漠化水平评价方法。
In this paper,the coverage of vegetation,the occupation ratio of bare land and the soil texture are determined as the evaluation indicators of the degree of wind eroded desertified land in frequently occuring area of sand dust storm. Based on these 3 indicators a mathematical model to determine the degree of wind eroded desertified land was set up. Meanwhile,considering the ratio of non desertified land area and different degree desertified land area, a regional evaluation model of land desertification level was given out. This evaluation system is testified to be applicable by using remote sensing technique and field investigation in the frequently occurring area of sand dust storm.
出处
《中国沙漠》
CSCD
北大核心
1999年第4期375-377,共3页
Journal of Desert Research
基金
国防科工委九.五攻关项目!(Y97# 10)
关键词
沙尘爆
土地风蚀
荒漠化
评价方法
风蚀
sand dust storm
wind erosion desertification
evaluation methodology
