The Eco-environment Fragility Analysis Of Typical Karst Mountainous Regions And The Discussion Of Ecology Reconstruction In Chongqing

The fragile karst regions has gradually become hot spot of the international geoscience research. After "geology,climate,hydrology and karst formation" and "karst processes and carbon cycle", the academician Yuan Daoxian and his assistants then proposed and implemented "the global karst ecology contrast",in which the core questions explained that the operating law of karst ecosystem, and effectively promoted the karst fragile ecological environment and the sustainable development in southwestern China.Chongqing is one of karst landform growth quite typical provinces,the katst regions in Chongqing aretypical ecological environment fragile area.The fragile karst environment is undergoing a vicious circle under the pressure of growth and economic development which has had serious affect on the implementation of the sustainable development strategy in this area.The performance is:The socio-economic development and ecological environment's coordination is bad, the sustainable ability is weak,person contradiction,person grain contradictory incisive prominent and so on aspects.Therefore,discuss the karst ecological environment vulnerable characteristic and the origin mechanism,do well the karst fragile environment the government,regarding enhances Chongqing karst mountainous area ecological environment capacity,the stability,realizes the sustainable development to have the important meaning.This article take Chongqing karst area as an example,carries on the analysis to Chongqing karst area ecological environment vulnerability, and carries on the discussion to the region ecology reconstruction technology.The full text mainly includes the following several parts:The first part is the foreword part.Including the karst fragile ecological environment's limits and the important meaning,the domestic and foreign karst fragile ecological environment research's present situation,this article studies the background and Chongqing physical geography characteristic and the karst area karst distributed survey.The second part is Chongqing karst mountainous area fragile ecological environment characteristic and the origin mechanism.Including Chongqing karst mountainous area ecology vulnerable characteristic:The farming resources insufficiency,the community structure are simple, the soil erosion is obvious,the soil erosion is serious,stone desert aggravating,withstanding natural disaster ability difference and so on;And from the intrinsic actuation factor,the external actuation factor two aspects embarks,proves to the Chongqing karst mountainous area ecological environment fragile reason.The third part is Chongqing typical karst area ecological environment vulnerability appraisal analysis.Selects Chongqing 25 karst areas,through selects 10 index factors to establish the karst ecological environment vulnerability appraisal system reasonably,unifies the expert using the analytic hierarchy process to grade calculates various targets weight,determined through the establishment membership function each target to each grading standards' degree of membership, uses the fuzzy synthesis judgment method to carry on the quantitative evaluation,then the basis biggest subordination principle decides on various counties area frailty rank and uses the GIS technology plan rank distribution map.The fourth part is karst rocky mountain area ecology reconstruction discussion.Including karst area ecology reconstruction meaning,reconstruction basic principle,as well as ecology reconstruction mentality and countermeasure,based on this,according to each rank frail area ecosystem characteristic,comparative analysis different frail area ecology reconstruction specific measures,technical route.The fifth part is conclusion and discussion...