基于物元可拓模型的水土保持综合效益评价

针对水土保持综合效益评价中信息屏蔽和单指标评价结果不相容的问题，采用物元可拓模型，对湖北省世行水土保持项目区的6个区域进行了综合效益评价，结果表明：项目区水土保持生态效益等级Ⅱ级以上的区域占整个项目区的833%，经济效益等级Ⅱ级以上的占50%，社会效益等级全部属于Ⅱ级以上，表明项目的实施产生了良好的生态、经济、社会效益；综合效益等级为Ⅱ级以上的占整个项目区的833%，项目整体上实施效果较好。利川水土保持综合效益等级为Ⅰ级，长阳和浠水水土保持综合效益具备向Ⅰ级转化的潜力，但长阳的转化潜力高于浠水。红安和麻城具有向Ⅲ级转化的潜力，夷陵水土保持综合效益等级最低。物元可拓模型评价结果与传统的综合指数评价法结果基本一致，表明该方法评价结果可靠。研究结果对水土保持综合效益评价方法体系建立具有一定意义，同时可为水土流失综合治理提供决策依据

COMPREHENSIVE BENEFIT EVALUATION OF SOIL AND WATER CONSERVATION BASED ON MATTER ELEMENT EXTENSION MODEL

The deterioration of the ecological environment caused by soil erosion has become China's important ecological security problems. Comprehensive control of soil erosion is a multidisciplinary, comprehensive systems engineering, which plays an important role in reducing soil erosion and improving the ecological environment. It's important to control the scientific decision making of soil and water loss, identify the implementation effect and promote the technology of soil and water conservation with a scientific and reasonable benefit evaluation. Focusing on the information shield and incompatibility of single index evaluation resulted in the comprehensive benefit evaluation of soil and water conversation, this paper adopted the matter element extension model to evaluate water and soil conservation projects from World Bank and Europe union in six counties of Hubei Province. The results showed that the projects of ecological benefit above grade Ⅱ level accounted for 83.3% of all evaluated objects, and the proportion of economic benefit above grade Ⅱ level was 50%. The social benefit of all objects was above grade Ⅱ level. This indicated the whole project had better ecological, economic and social benefits. Lichuan's comprehensive benefit of soil and water conservation was grade Ⅰ level. Changyang and Xishui were of grade Ⅰ level trend, but Changyang had more potential than Xishui. Hongan and Macheng had the potential to transfer to grade Ⅲ level. Yiling's comprehensive benefit of soil and water conservation was the lowest. The projects of comprehensive benefit above grade Ⅱ level accounted for 83.3% of the whole evaluation objects. Implementation of the project made good ecological, economic, social benefits, and the overall project implementation effect was good. The evaluation result based on matter element extension model was consistent with the result of traditional comprehensive index evaluation method, and indicated that this model was reliable. Matter element extension model to solve the problem of incompatible factor evaluation grade of all the benefits of soil and water conservation had a wide application in the future, but the evaluation of matter element classical domain and joint domain still needed to be further studied