黄土高原土壤保持生态服务功能价值估算及其时空变化研究

Estimation of Soil Conservation Ecological Service Function Value and Its Temporal and Spatial Changes in the Loess Plateau

基于RS、GIS技术,应用修正后的通用土壤流失方程,计算潜在土壤侵蚀量和现实土壤侵蚀量,两者差值得到土壤保持量,再应用市场价值法、影子工程法和机会成本法从保护土壤肥力、减少泥沙淤积和减少土地废弃价值3个方面来评价土壤保持价值。探索评估黄土高原重要生态功能区生态系统土壤保持功能及其经济价值,以期为该区生态系统土壤保持功能的保护与管理提供一定的理论支撑。

Based on RS and GIS technology,the potential soil erosion and the actual soil erosion was calculated by applying the modified general soil loss equation.The difference between the two is obtained by soil conservation,and then the market value method,shadow engineering method and opportunity cost method are applied.Soil conservation values are evaluated in three aspects:protecting soil fertility,reducing sedimentation,and reducing land waste value.The soil conservation function and its economic value of the ecosystems in the important ecological functional areas of the Loess Plateau were explored and evaluated,in order to provide some theoretical support for the protection and management of soil conservation functions in the ecosystem.