Comprehensive Evaluation On The Ecological-production-living Carrying Capacity Of The Contiguous Poverty-stricken Areas In The Case Of Sichuan Shaanxi And Gansu Provinces Junction

Ecological-production-living carrying capacity is an organic synthesis of the carrying ability of regional resources and ecological environment, ability of economic activities and ability of social development which can meet living standards for certain population. Ecological-production-living carrying capacity is composed of 3 parts,respectively, the ecological carrying capacity in support layer, production carrying capacity and living carrying capacity both in performance layers, which is an important standard to measure the level of regional development. Due to the development of society and economy, the contradiction among regional ecology, production and life have became increasingly prominent, especially in poor areas where the economic development is relatively backward and ecological environment is fragile. The poverty-stricken areas are eager to get rid of poverty with the irrational exploitation and utilization of resources, leading to a series of ecological and environmental problems,seriously affecting the regional sustainable development. However, the research on the ecological-production-living carrying capacity is a little, especially in the 14 national poverty-stricken areas in the outline of China's rural poverty alleviation and development program (2011-2010).Qinba mountain area is one of the national poverty-stricken areas. 15 poor counties in Qinba mountain area at the junction of Sichuan Shaanxi and Gansu provinces as the study area, the study aimed at the evaluation study of the ecological-production-living carrying capacity for poverty-stricken areas. 15 poor counties contain 4 counties and one district in Guangyuan City of Sichuan Province (Guangyuan District, Wangcang County,Qingchuan County, Jiange County, Cangxi County), 8 counties in Longnan City of Gansu Province(Cheng County, Wenxian, Dangchang County, Kang County, Xihe County, Li County, Hui County, Liangdang County), and 2 counties in Hanzhoung city of Shaanxi Province (Lueyang County and Ningqiang County), which located at the junction of three provinces, Shaanxi Gansu and Sichuan provinces. On the basis of the state space method, using social economic statistical data, land data and environmental conditions data of the junction of Sichuan Province , Shaanxi Province and Gansu Province, use principal component analysis and entropy method to construct the national poverty-stricken areas's ecological-production-living carrying capacity evaluation index system for poverty-stricken areas, and analyze the ecological-production-living carrying capacity evaluation results. And on the basis of the above analysis, we made a comparison between the national key ecological function areas of poverty counties and other counties which are not national key ecological function areas of poverty counties.Then at county scale combined with the relevant poverty alleviation data, use AHP to build poor areas's poverty alleviation performance evaluation index system in Shaanxi Gansu Sichuan provinces junction, analyze poverty alleviation performance, and make a coupling analysis between ecological-production-living carrying capacity and poverty alleviation performance in poor areas to provide the reference for the development and utilization of resources and poverty alleviation and development in poor areas.The results show that: 1) The ecological-production-living carrying capacity in the poor areas of Sichuan, Shaanxi and Gansu provinces junction is mainly in the rich or onloaded condition. The comprehensive carrying capacity indexes from high to low are :Hanzhoung, Guangyuan, Longnan.2) The ecological carrying capacity of the study area is in rich or onloaded. The ecological carrying capacity index from high to low is:Hanzhoung,Guangyuan, Longnan. 3) The ecological carrying capacity is relatively complex, production capacity in Longnan and Shaanxi is onloaded, Guangyuan is in the overload, and the ecological carrying capacity indexes from high to low are: Guangyuan,Hanzhoung, Longnan. 4) As the living carrying capacity in the study area, Guangyuan is in the overload,Hanzhoung is overloaded or above loaded,East Longnan is overloaded or above loaded, West Longnan is loadable; living carrying capacity index in poverty stricken counties in Gansu Longnan, eastern was significantly lower than the western. 5)Comprehensive carrying capacity, production carrying capacity and living carrying capacity in national key ecological function areas of poor counties is lower than other counties, the ecological carrying capacity index in national key ecological function areas of poor counties is higher than other counties. National key ecological function areas are facing more pressure from ecological environment, and ecological elastic limit bearing capacity is lower. 6) At county scale, poverty alleviation performance results from high to low ranks: Lueyang County, Qingchuan County, Cheng County, Ningqiang County,Cangxi County, Jiange County, Wen County, Yuanba District, Liangdang County, Kang County, Hui County, Xihe County, Li County and Tanchang County. From the city perspective, the Poverty alleviation performance results in poor counties from good to bad are Hanzhoung in Shaanxi, Guangyuan in Sichuan, Longnan in Gansu. 7) Poverty alleviation performance results are bad in Tanchang County, Liangdang County, Kang County among the national key ecological function areas of poor counties.As to other counties which are not national key ecological function areas, poverty alleviation performance indexes of Li County, Xihe County, Hui County and Guangyuan District are low. 8) The coupling results between ecological-production-living carrying capacity and poverty alleviation performance results are complex: correlation between comprehensive carrying capacity and poverty alleviation performance index is not obvious; there is a positive correlation between the poverty alleviation performance and ecological capacity,and poor counties in higher poverty alleviation performance index have better ecological carrying capacity; correlation between poverty alleviation performance and the production carrying capacity is not obvious;living carrying capacity,neither.