Assessment of the Economic Benefits of Water and Soil Conservation Engineering in North China

摘要

The assessment index system of the economic benefits of water and soil conservation engineering is studied in this paper. The assessing methods of the direct and indirect benefits of water and soil conservation engineering, and the sensitive analysis method are also researched too. Two special points in the theoretical research are: (1) It is clearly pointed out that internal return rate (IRR) does not stand for the return rate of the investment of a project, and can't be used as an assessment index to judge a project's economic effect, but can be used as a sensitive index. A new assessment index is given out to assess the investment return rate of a project. It is external return rate (ERR). (2) A reasonable assessment method is presented to estimate a conservation project's indirect economic benefits on alleviating rain erosion according to the decreasing quantity of erosion soil. We also made the economic assessment and sensitive analysis of the important water and soil conservation projects finished in last few years in North China by using the above methods, and presented some reasonable suggests about the future conservancy work.