Evaluation On Slcp Policy Based On Water And Soil Conservation Benefit

Loess plateau in the upper reaches of the Yellow River has always been the Most serious soil erosion areas in our country. After suffering from the heavy flood disaster in 1998, State council had taken a series of measure to recover the ecology and save people from the disaster.After the beginning of the first round of the Grain for green Project, people had a lot of passion to take part in,the scale of the manual forest was like an explosion. But it also disclose a string of problem, leaving us to solve. First of all, the sustainability has been a hot topic.Grain for green Project has been constrained to a lot of problems, such as it forced us too fast to converse those crop land to forest.the biology effects had been constrained to the limited knowledge of the peasants, or the finance subsidy has not been paid in time. On the other hand, food crisis had been another problem we may have to face. The too fast plan made the broke up of the land use, make it hard to manage.Evidence shows that the SLCP have to go on, so policy is needed to be built in the balance between the ecologic effects and the economics efficiency. So it needs us to evaluate it on the base of economic sufficient.We use the LUCC to build the bridge between the SLCP policy, which bring subsidy to the public and occur cost, and the ecology effect, which is the purpose of the SLCP. We use SWAT(developed by the USDA) which need to input DEM, soil type, weather information and LUCC, then outputs the watershed information of several types, including water yielding and sand yielding, we can use these data to measure whether the ecological effect is e conomic efficient. The result shows that the 10 degree is the most ecologic efficient slope.