Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Chine → 2005 → Evaluation On Ecological Security,Warning And Controlling Research In Arid Land Of Western China

Xinjiang University (2005)

Evaluation On Ecological Security,Warning And Controlling Research In Arid Land Of Western China

Lv Guang Hui

Titre : Evaluation On Ecological Security,Warning And Controlling Research In Arid Land Of Western China

Auteur : Lv Guang Hui

Grade : Doctoral Dissertation 2005

Université : Xinjiang University

Résumé partiel
The stratagem of western developing is put in practice in China. For this reason, Xinjiang becomes the key area of development and construction in 21st century. However, the eco-environment and the surviving condition are extremely fragile. In this region, the survival and living environment is exceeding bad. Frequent natural disasters restrain the utilization of resources. The fragile environment has become principal problem that restricts the whole district economy and social development. In order to implement the stratagem of western developing, it is a primary problem to set up the ecological security system that ensures sustainable development of regional economy society. Therefore, in Xinjiang,the typical arid area of the western China, it has important significance to analyze and research ecological security evaluation, warning and controlling. The reasons are as follows : for one thing, choosing the tactics of ecological construction of Xinjiang will be more accurate and scientific. In addition, the government department can grasp the change of ecological security, then make controlling and administration measure in time. Finally, it is an effective strategy to develop western regions, build ecological environment and ensure ecological security. In this paper, we evaluate the ecological security of Xinjiang by using the estimate model of ecosystem service, factor analysis model, neural network model and the analytic hierarchy system. The main contents are as follows : 1. Studying the theory of ecological security and current situation systematically. 2. Studying the characteristic of ecological environment in Xinjiang and existing problems, and analyzing the variation tendency of the ecological environment. 3. Studying the value evaluation and the variation tendency of ecological service services which was put forward by Constanza. The economic worth of ecosystem service in Xinjiang was 1034 billion yuan in 1996 and it was 952 billion yuan in 2003. Compared with 1996, the value was reduced 82 billion yuan in 2003.The losses of ecological value are enormous. 4. The ecological security evaluation index system in Xinjiang is set up. At the same time, ecological security evaluation of Xinjiang is studied by using factor analysis method (1988-2003). Then, we get these conclusions : (1)Plantation, forest coverage rate, per capita GDP, Engel coefficient of urban residents, university student’s number of per ten thousand people and average salary of the worker are the factors of that influence the ecological security. All these factors above are synchronous. In addition, chemical fertilizer load of unit’s area, energy consumption of industrial output value and population are also synchronous. In case of same increment, the influence degrees of the positive factors are as follows : per capita GDP> Average salary of the worker > Forest coverage rate > Engel coefficient of Urban residents> Cultivated land> University student’s number of per ten thousand people. The influence degrees of the negative factors are as follows : Population> chemical fertilizer load of unit’s area> energy consumption of industrial output value. (2)In factors of influencing ecological security, precipitation, input intensity of pollution control, comprehensive utilization ratio of industrial waste and R&D proportion account for GDP demonstrate synchronous. In case of same increment, influence degree of these positive factors to ecological security that arranging from great to small are as follows : Precipitation>R&D proportion account for GDP>comprehensive utilization ratio of industrial waste>input intensity of pollution control. (3)According to the magnitude of synthetic factors of influencing ecologicalsecurity, we can draw a conclusion about ecological security in Xinjiang from 1988 to 2003 :

Mots clés : Xinjiang, ecological security, evaluation, warning, controlling

Présentation (Dissertationtopic)

Page publiée le 19 avril 2013, mise à jour le 22 avril 2018