Study On The Environmental Carrying Capacity Of Jurassic Coalfield In Northern Shaanxi Province

Jurassic Coalfield of northern Shaanxi Province,with a total area of 27 140 km2,which located in Yulin City of Shaanxi Province, including Fugu,Shenmu,Yu Yang, Hengshan, Jingbian, and Dingbian County, is divided into three main mining areas: Shenfu mining area, Yushen mining area and Yuheng mining area.As the energy industry region, Northern Shaanxi Provice is one of the most potential region in China. In order to keep regional resource exploration and the ecological environment sustainable and healthy development,in the analysis of single and comprehensive elements evaluation methods, the paper,by calculating relative surplus ratio of environmental carrying capacity,study on the the specific regional environmental carrying capacity and the conclusions are as follows:Firstly, the calculated result of the quantity of loading appropriate population show that the area of land resources capacity is serious overloading. After forecasts, as increased food production by 2010, the land can support basic local population.Secondly, water resource capacity of Shenfu and Yushen is relatively strong compared withYuheng. However, the instability of water carrying in the region makes it difficult to carry Coal Industry in a long time which consuming large quantity of water.Thirdly, ecological flexibility: Shenfu> Yushen> Yuheng; resources and environment capacity: Shenfu> Yuheng> Yushenfu; ecological environment pressure index:Shenfu > Yushenfu> Yuheng.Overall, the region,with fragile ecological carrying capacity and low stability system, have weak capacity to resist potential environmental changes, pollution and destruction.So it is necessary to strengthen the construction of ecosystem restoration,to decrease the the pressure and to increase the capacity.Forthly, the results of environmental capacity relative residual rate model show that: the Yushen mining area have much environmental carrying capacity (1.1897)than the other two, followed by Yuheng mine (-0.0668); After years of Mining, Shenfu mining area has been seriously overloading (-0.0729).In conclusion,high-intensity and large-area mining is inappropriate.We should continue to implement the policy of ecological compensation mechanism,land reclamation and related.