摘要
在分析了昭通地区土壤侵蚀成因和规律后,本研究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年昭通地区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/INFO7.11和AR-CVIEW3.2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长防林(云南部分)实施后产生的生态效益尤其是土壤侵蚀的治理作出了科学评价。
Based on analysis to the causes and laws of soil erosion in Zhaotong prefecture, Yun'nan province, 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 to 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 Zhaotong prefecture was produced by ARC/INFO 7. 11 and ARCVIEW3. 2 software. Finally, according to the result of statistics from the erosion map, scientific evaluations on the ecological effects were made for the Changjiang river protection forest in Zhaotong prefecture.
出处
《水土保持通报》
CSCD
北大核心
2003年第2期36-39,共4页
Bulletin of Soil and Water Conservation
基金
湖北省涝渍灾害与湿地农业重点实验室开放科研基金项目(HNKFJ2002A04)
云南省青年基金项目(96C068Q)
