基于GIS的六盘水市水土流失调查分析

Investigation and Analysis of Water and Soil Erosion of Liupanshui City Based on GIS

区域水土流失的研究是我国水土流失中的重点,而南方水蚀区的水土流失的动态研究较少,水土流失已经成为社会经济发展中不可忽视的社会问题和环境问题,开展区域水土流失分析评价与研究十分有必要。该文利用3S技术,以ASTER GDEM 30m DEM为基础数据提取贵州省六盘水市坡度数据,与六盘水市1990—2015年土地利用数据进行叠加分析,参照中华人民共和国《土壤侵蚀分类分级标准》(SL190—2007),结合六盘水市实际情况评定六盘水市水土流失等级,对近25年水土流失状况进行动态监测。结果表明,六盘水市水土流失状况是一个波动起伏的过程,但总体上水土保持有所改善。并且分析了其变化特征、规律及产生的原因,提出了相应的治理措施。

The study of regional soil and water loss is the focus of soil and water loss in our country.However,there are few studies on the soil erosion in the water erosion area in the south.Soil and water loss has become a social and environmental issue that can not be neglected in the social and economic development.Research is very necessary.In this paper,the slope data of Liupanshui City in Guizhou Province were extracted based on the ASTER GDEM30mDEM data and the land use data of Liupanshui from1990to2015were superposed with3S technology.According to the"Classification Standard of Soil Erosion Classification"(SL190-2007)of the People's Republic of China)and the actual situation of Liupanshui City,the grade of soil and water loss in Liupanshui City was assessed.The soil and water loss status in recent25years was monitored dynamically.The results showed that the water and soil loss in Liupanshui City was a fluctuating process,but the overall soil and water conservation was improved.Finally,the article analyzes its changing characteristics,rules and causes,and puts forward the measures of governance.