Ecological Security Assessment In Qingyang City

The ecological security research is the current geoscience, the resources and the environmental science as well as the ecology research front duty and the important domain. The Qingyang attendance loess hill gully area, in the state-level"the conservation of water and soil important area", is the typical ecology frail area, its ecological security affects the entire Loess Highlands area ecology government, but aimed at the areas'ecological security assessment research still not to see.On domestic and regional ecological security evaluation of the model and framework for a comparative analysis indicator system,AHP concept modelwith the State-combined Construction of the Qing yang ecological security evaluation system.By socio-economic development's pressure, the ecology and the environment system has analyzed the Qingyang area ecosystem characteristic to the pressure back donation and the humanity to the ecology series's regulative three aspects, has constructed this area ecological security evaluating indicator system. This indicator system has highlighted the Qingyang area drought as well as the soil erosion serious condition, proposed the average per person water resources capacity as well as the influence ecological security's index of correlation, suits in the Qingyang area ecological security appraisal need. The indicator comprises 25 indicators,Include: the average annual precipitation; the average annual transpiration ; the vegetation coverage rate;≥15°slope cultivated area index; soil erosion intensity index; built-up district afforestation degree of coverage; average per person water resources capacity; average per person farming; region development index; the natural population growth rate; population density; chemical fertilizer use intensity; agricultural membrane use intensity; NOx emissions intensity; SO2 emissions intensity; water quality target success rate; , air quality composite index; ambient noise; ten thousand people have above the high school the years of schooling population; economic development aggregate level (position entropy); natural disaster area; water and soil rate of personnel loss; farmer average per person net income; per capita GDP; urbanization rate. Based on the evaluation of the properties,and the level of domestic and foreign-related standards,the development of regional ecological security evaluation criteria and grading( bad, is bad, general, is good, is ideal).Respectively AHP and expert scoring for regional ecological security evaluation indicators empowers and using agro-ecological safety level index to characterize the results. the results are:Overall Qingyang's ecological security index is low, the ecological security condition is bad and unbalance in each county.in Qingyang various counties, the Heshui County ecological security composite index is highest, is 0.66, the ecological security condition is good, the ecology degree of security is safe; Huachi, Ning County, Zhengning and west peak ecological security composite index between 0.4~0.6, ecological security condition for general, ecology degree of security for early warning condition; other three county ecological security index between 0.2~0.4, the ecological security condition is bad, the ecology degree of security is the critical condition. The analysis shows that: the ecological security level in Qingyang city is esrly warning. The main reasons which lead to the dangerous of the ecological security are: shortage of water resource, soil erosion, land desertification and old oil region pollution.The analysis present Qingyang's ecological security's overall condition as well as the question, proposed target-oriented strengthens the region ecological security management the countermeasure. Strengthens the agriculture ecological security management, establishes the agriculture ecological security early warning system; the reasonable development use water resources, raises the water resources use factor; insisting the small basin comprehensive program of public order, the conservation of soil against erosion; strengthens the old oil region the pollution government; adjusts good agricultural, the forest, the herd proportion, the promotion ecological agriculture healthy development.