Research On Ecological Environment Assessment Of Quanzhou Bay Based On GIS And RS

The ecological environment problem is the fundamental problems affecting human survival and development of social economy. In recent years, with the emergence of a series of environmental problems such as global warming, air pollution, soil erosion, lack of fresh water resources and so on, it has been known gradually that a good ecological environment is one of the necessary conditions for existence and development of human being. Therefore, how to minimize the damage to the ecological environment and how to achieve sustainable development in the planning of regional development, the reasonable evaluation and objective understanding on the ecological environment situation of the region is particularly important.The Quanzhou Bay area is one of the important regional development of Hercynian economic zone. In this paper, by using GIS and RS technology, we processed the basic data in order to extract the matic information. Moreover, a comprehensive evaluation using comprehensive index model was established based on the full understanding of the characteristics of the ecological environment of the Quanzhou Bay area. The main achievements are as follows:(1) This paper analyzed the characteristics of ecological environment in the area of Quanzhou Bay based on the theoretical study;and extracted thematic information by using GIS and RS technology; and established a set of comprehensive evaluation index system and grading standards of the regional ecological environment from five aspects of topography, resources, environmental quality, geological disasters and social economy.(2)The index weight was calculated through the method of AHP and Delphi. And the comprehensive evaluation on the ecological environment of the Quanzhou Bay area was made by using comprehensive index model and GIS raster overlay function.(3) By analyzing the results of comprehensive evaluation and combining with the idea of sustainable development, some forward opinions and suggestions has also been presented on the future development planning of Quanzhou bay.Research shows that the ecological environment of Quanzhou Bay area is good in general. In every rank as the five level of division, the third grade above area accounts for 86.81%.The second grade has the highest proportion, leading the level of whole situation for regional ecological environment. But there is still poor partial district in need of attention. This paper also shows that the theory and method of comprehensive evaluation on ecological environment based on GIS and RS technology has a strong exploratory and pioneering: using GIS and RS method for the comprehensive evaluation of the regional ecological environment, the data acquisition has the characteristics of convenient and fast. Raster overlay function can make the evaluation results more accurate. Spatial expression function can make the evaluation results more direct viewing and more likely to accept.