湖北省房县土地利用变化与土壤侵蚀评价

Evaluation on Land Use Change and Soil Erosion in Fang Country of Hubei Province

基于3S技术提取土地利用类型与土壤侵蚀相关信息,对湖北省房县1995~2000年的土地利用、土壤侵蚀状况及变化趋势进行分析评价,并利用ARCGIS的叠加分析功能,着重探讨了土地利用变化对土壤侵蚀强度的影响。结果表明,研究区内土壤侵蚀强度递增的用地类型依次为水田、林地、草地、旱田、裸地;土地利用变化总趋势为,林地面积减少,草地、农田、建设用地、裸地均有所增加;土壤侵蚀变化总趋势为侵蚀总面积有所减少,但侵蚀强度增加,治理难度增大。

Based on information extracted by 3S technology,land utilization,soil erosion and the change tendency are analyzed and evaluated from 1995 to 2000 in Fang Country of Hubei Province.Using superimposition analysis function of ARCGIS,it is emphatically discussed the influence of land utilization change on the soil erosion intensity.The results indicated that the soil erosion intensity incremental types of land are paddy land,forest land,lawn land,dry farm land, and the bare land.The land utilization change general tendency is that the forest land area decreasesd while the others land types increased.The general trend of soil erosion change is that the total area decreased,but its intensity increased,and the control difficulty increased.