Analysis On The Sustainable Development Capacity Of Significant Eco-function Areas In Karst Region Based On Ecological Footprint Model

As the contradiction between man and land becomes increasingly sharp in the world, ecological environment keeps deteriorating and human survival is further threatened; therefore, sustainable development has become a common development mode pursued by all countries. Under the guidance of sustainable development theory, countries and regions pay more attention to the development planning around significant eco-function areas and use ecological footprint method for quantitative measurement of sustainable development in significant eco-function areas, so as to facilitate development planning based on actual measurement in these areas. Adopting ecological footprint model and using main resource and energy data in Libo County from 2004 to 2013 to measure sustainable development status of ecological environment in the researched area, this paper analyzes the overall sustainable development state of Libo ecological environment based on quantitative analysis of aspects such as ecological deficit, and finally puts forward relevant strategy for sustainable development of ecological environment in Libo County. The following results have been achieved through the research:(1) The supply-demand ability of ecological environment in Libo is not balance, continuously in a state of ecological deficit for 10 years, but the deficit keeps decreasing. From 2004 to 2013, total ecological footprint in Libo has been cut down year by year, decreasing by 200197.19 hectares from 2004 to 2013, down nearly 1.6 times. Ecological carrying capacity in Libo has been greatly fluctuated, minimum 1710.29 hectares in 2004, increasing to 8247.77 hectares in 2011, an increase of 4.8 fold against 2004, and then dropping to 3573.96 hectares in 2012, while quickly rebounding to 19078.97 hectares in 2013;(2) The sustainable development ability of Libo still needs improving. Libo ecological footprint per ten thousand yuan GDP and ecological deficit per ten thousand yuan GDP have been on a downward trend since 2004, respectively from 7.7 hectares/ten thousand yuan and 7.68 hectares/ten thousand yuan in 2004 to 1.07 hectares/ten thousand yuan and 1.02 hectares/ten thousand yuan. However, as a national key ecological function area, there is still a long way to go before fulfilling the responsibilities and tasks for ecological protection;(3) Countermeasures for sustainable development in Libo. In order to improve regional ecological carrying capacity and decrease ecological footprint, the sustainable development of ecological environment in Libo should start with the zoning of significant eco-function areas, encourage giving play to major function of corresponding area, using limited land resources scientifically and rationally, and improving the biological production and supply capacity. It is necessary to implement energy saving and emission reduction, develop green and circular economy, strengthen monitoring and assessment, and take positive actions to control the current ecological environment problems.