基于3s技术的土壤侵蚀分析

在分析了重庆南岸地区土壤侵蚀成因和规律后,选择了植被盖度和坡度作为确定土壤侵蚀等级的主导因子,利用1999年南岸地区TM卫星图像进行判读,提取植被盖度、土地类型和土地利用方式等信息,从地形图提取坡度信息,最后应用地理信息系统(GIS)的通用软件工具ARC/INF0、ERDAS IMAGINE8.5和ARCVIEW3.2进行土壤侵蚀等级的空间分析,得到了土壤侵蚀等级空间分布图;根据土壤侵蚀等级图的统计分析结果对土壤侵蚀的治理进行了科学评价。

Analysis of soil erosion investigation based on 3S technology

Based on analysis of the causes and laws of soil erosion in Nan'an District of Chongqing,the vegetation coverage percent,land use type and topography slope degree were selected as the key factors for evaluating the degree of soil loss.After fieldwork and analysis of the related materials,the relationship between TM image features and those key factors were established.And the vegetation coverage percent and land use type were extracted from TM accordingly.Combined with the information of slope degree from topography map,the erosion grading map of Nan'an District was produced by ARC/INFO,ERDAS IMAGINE8.5and ARCVIEW3.2 software.Finally,according to the result of statistics from the erosion map,scientific evaluations on the ecological effects were made for the erosion in Nan'an District.