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中国是世界上水土流失最严重的国家之一,要进行水土流失的治理,首先要对中国的水土流失的现状和宏观趋势进行评价。研究试图采用全数字化方式,对中国潜在水土流失进行评价,为国家和区域水土保持和生态环境建设决策提供依据。研究结果包括:编制了中国水土流失类型图;确定了一套适合中国潜在水土流失宏观定量评价的指标体系,建立中国潜在水土流失评价数据库;以评价数据库为基础,进行了单因子分析和多因子评价分析,并基于“专家知识”完成了中国潜在水土流失评价与制图;在地理信息系统支持下,初步实现了多源数据集成的程序等。
China is one of the countries with the most serious soil erosion in the world. To control soil and water loss, we must first evaluate the status quo and macroeconomic trends of soil and water loss in China. The study attempts to use the all-digital way to evaluate the potential soil erosion in China and provide the basis for national and regional decisions on soil and water conservation and ecological environment construction. The results of the study include: compiling a type map of soil and water loss in China; identifying a set of index system suitable for macroscopic quantitative assessment of potential soil erosion in China; establishing a database of potential soil and water loss assessment in China; carrying out single factor analysis and multifactorial analysis based on the evaluation database Evaluation and analysis, and based on “expert knowledge ” to complete the evaluation and mapping of potential soil and water loss in China; With the support of GIS, the initial implementation of multi-source data integration procedures.