摘要
在RUSLE经验模型的基础上结合"3S"技术对河南省土壤侵蚀现状进行研究。结合河南省当地的地貌特征,根据我省相关的观测资料,计算土壤侵蚀的各因子值,建立适合本省的土壤侵蚀预报模型;应用GIS不仅可以方便地进行参数输入,还可以按照计算结果描述土壤侵蚀空间分布差异,同时用户可用GIS模块中的数据分析工具,根据所需目的进行数据分析、查询和图形输出。遥感影像作为数据源为侵蚀因子提供基础数据,同时还可以从遥感影像中直接判读土壤侵蚀类型。首先找出土壤侵蚀模型所需要的适合河南省的降水侵蚀力因子、土壤可蚀性因子、地形因子、植被覆盖与水土保持措施因子并栅格化之后,在ARCGIS的Raster Calculator模块里根据其土壤流失预测公式获得河南省土壤侵蚀强度分布图,再根据sl190-96的分级标准(表)进行分级,获得河南省土壤侵蚀强度等级分布图,河南省内各地土壤侵蚀情况即可一目了然,为政府决策提供了科学参考,为今后的研究提供了理论依据。
Based on a large number of researches,in accordance with the actual situation in geography and geology environment in Henan Province,this paper summed up the evaluation methods of soil erosion for Henan.Based on RUSLE mode,first of all,soil erosion model needed to get rainfall erosivity factor,soil erodibility factor,terrain factor,vegetation cover and soil and water conservation measures factor.Henan soil erosion intensity distribution was obtained according to soil erosion prediction formula in the Raster Calculator module of ARCGIS.Then obtained Henan soil erosion strength grade distribution according to sl190-96 classification standard.So the soil erosion situation would become clear,and the scientific reference for the government decision-making and the theoretical basis for future research were provided.
出处
《土壤通报》
CAS
CSCD
北大核心
2010年第5期1161-1164,共4页
Chinese Journal of Soil Science
基金
河南省气象局气象科学技术研究项目(Z200606)资助
关键词
GIS
土壤侵蚀
降雨侵蚀力
土壤可蚀性
地形因子
植被覆盖与水土保持措施因子
GIS
Soil erosion
Rainfall erosivity
Soil erodibility
Terrain factor
Factors of vegetation cover and soil and water conservation measures
