Evaluation On Ecological System Health In "Zhu-Zhong-Jiang" Urban Agglomeration

With the the quick development on society, economy, science and technology, the degree of effect that human beings have on the earth and the living environment is increasingly aggravated, hence there are more and more various environmental and ecological problems. To deal with ecological crisis and mainten health of ecosystem to the full extent, researches on health of ecosystem have been attached more and more importance by scholars. Although academic circles haven't established a complete theoretical system on the health of ecosystem researches at present , scientific understanding of the situation of regional ecosystem health, and then reference basis on which policy about regional ecosystem health should made, can be provided.Based on the theory of ecosystem health,through the ecosystem health assessment study for area, borrowing ideas of "V-O-R" evaluation model in natural ecology, considering recent conditions of Zhuhai and Zhongshan and Jiangmen, 19 evaluation indexes are selected, a index system including energy, building organizational strength, resilience, system service function and people health are established.Zhuhai, Zhongshan and Jiangmen were selected as three evaluation units, and ecosystem health of this urban agglomeration were comprehensively evaluated under the analytic hierarchy process and the multiple factor model,have evaluated about the ecosystem health of "Zhuhai-Zhongshan-Jiangmen" urban agglomeration.The findings are as follows:(1) With the theory of urban ecosystem health as the guide, according to social, economic and environmental, etc. various condition of "Zhuhai-Zhongshan-Jiangmen" urban agglomeration, "Zhuhai-Zhongshan-Jiangmen" urban agglomeration ecosystem health evaluation index system was established, which is divided into target layer, criterion layer and index layer 3 levels. With relevant index and related data from domestic and overseas for reference, a "Zhuhai-Zhongshan-Jiangmen" urban agglomeration ecosystem health evaluation method was formed.(2) Through comparative analysis on spatial characteristics of condition of the urban ecosystem health, it can be seen that among the three cities, the healthiest ecosystem is Zhongshan, then followed Zhuhai, the last is Jiangmen. City health comprehensive values of Zhuhai and Zhongshan and Jiangmen are respectively 0.8348, 0.7779 and 0.7574. According to health hierarchies standard, the three cities are healthy in general, the ecological systems of "Zhuhai-Zhongshan-Jiangmen" urban agglomeration are in healthy status in general, level of a regional ecosystem health is the result of comprehensive effect of many factors such as social service function, economic development level, residents happiness degree, energy comprehensive utilization of environmental protection, industrial structure.(3) the favorable factors of the ecosystem health situation in "Zhuhai-Zhongshan-Jiangmen" urban agglomerationis are crowd health, system service function and restoring force, adverse factors is the vigor and organizational force. happiness index of residents here is relatively high, social and natural service function is comparatively perfect, energy of recycling use is in high efficiency, effect of environmental protection is good. Therefore, the regional industrial structure need further adjustment and upgrading.(4) The index of evaluation criteria layer from scoring visible, the results showed that in Zhuhai the comprehensive index score in vigor, organizational force, system service function and the health is the highest, but health index is minimum;In Jiangmen, vigor, organizational force and system service function of health comprehensive index scored the lowest, restoring force and crowd health score are higher;In Zhongshan, restoring force health comprehensive index scores highest, crowd health are in the lowest score, and other factors are in the medium level among the three cities.