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在ArcView地理信息系统的支持下,采用国际上应用广泛的土壤流失方程(USLE)来估算太原市城区及近郊区各类型生态系统土壤保持的物质量,再利用市场价值法,机会成本法评价各类型生态系统对土壤保持的经济价值。结果表明:研究区土壤保持总价值从1990年的81.89×105元上升到2002年的196.98×105元,12年中共增加了115.09×105元,上升幅度相对较大。其中林地保持土壤价值在两年的总价值中所占比例最大,分别为1990年的68%和2002年的79.70%,这说明林地的土壤保持功能在研究区土壤保持过程中起着重要的贡献作用。
With the help of ArcView GIS, the international widely used soil loss equation (USLE) was used to estimate the amount of soil retained by various types of ecosystems in urban and suburban areas in Taiyuan City. The market value method and the opportunity cost method The Economic Value of Type Ecosystems for Soil Conservation. The results showed that the total value of soil conservation in the study area increased from 81.89 × 105 Yuan in 1990 to 196.98 × 105 Yuan in 2002, while that in the 12th year increased by 115.09 × 105 Yuan, a relatively large increase. Among them, the soil conservation value of woodland accounted for the largest share of total value in two years, which was 68% in 1990 and 79.70% in 2002, respectively. This indicated that soil conservation function of woodland played an important role in soil conservation in the study area effect.