Evaluation Of Comprehensive Benefits On The Management Of Collapse Gully

Based on the comprehensive research, site exploration and sampling and analysis, this thesis mainly talks about the comprehensive benefits of managing of Hengmei Watershed, Hengmei Ecology Tea Garden of Anxi Town, Fujian Province. It's according to the Ecological Economics Principle and by the methods of the Statistical Analysis and Evaluation, through the research of strength development and management of changing collapse gully erosion area to ecological tea garden. It chooses 11 indexes as the Index system to make the analysis from four aspects of Basic Benefits, Ecological Benefits, Social Benefits and Economic Benefits by the analytic hierarchy process and expert scoring. The method of multi-level fuzzy evaluation shows the feasibility and results of the measures to provide theoretical foundation and direction for the management of collapse gully.The result shows: the Index system of evaluation and evaluation method can comprehensively show the benefits of Water and soil keeping relatively. It is suitable for some region and very important for the management of collapse gully in the future.(1)After management, the soil erosion modulus and runoff modulus have been reduced. It achieved remarkable results and improved the situation the water and soil loss a lot.(2)The ecological benefit has been improved more while the soil fertility index raised from 0.2301 to 0.7210, every index of soil properties improved relatively with organic matter improved the largest, also the plant coverage and biodiversity are significantly increased which improves the local ecological environment.(3) The economic benefit of tea garden is remarkable. Though the invest was large, the investor can get back the invest in five years at the support of country and government. Meanwhile, it will increase the farmer's income and improve the living condition a lot.(4) The comprehensive management benefits value of collapse gully is 0.7231. which has been improved 354% than 0.1594 before management. The comprehensive benefits of the collapse gully in the project area is very favorable and the evaluation value of the Basic Benefits, Ecology Benefits, Social Benefits and Economic Benefits are respectively 0.0943, 0.2744, 0.2205 and 0.1339, with contribution rate 13.04%, 37.33%, 30.49%, 18.52%. It can conclude that the ecological benefits and economic benefits are the most important ones in comprehensive benefits. The remarkable benefits of comprehensive management has shown that the strength development and management of changing collapse gully area to ecological tea garden in Hengmei Watershed of Anxi is not only feasible and necessary but also worthing learning and promotion.