期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII-B8
页码：331-336
出版社：Copernicus Publications
摘要：The exploitation of fossil fuels is a main factor for environmental deterioration, especially the large-scale exploitation of high-sulphur gas because of the toxicity of sulphur. There exist many different types of environmental risk threats in gas exploitation, regardless of whether it is caused by human activity or natural calamity. It is impossible to control nature, but it is possible to map ecological risk zones and thereby minimize the frequency of accident, avert ecological disaster. In this paper, Puguang high-sulphur gas field was taken for a case study. Regional ecological risk assessment of high-sulphur gas exploitation was discussed through the advanced regional ecological risk assessment for the first time. A geographic information system was used as the data integration analysis platform, and the topographic data and land-use information of Puguang gas field in 2001 as the main data source. Comprehensive ecological risk index was constructed based on the topographic data, land-use structure and other different risk source factors, being calculated by assigning subjective weights to the classes of risk source factors according to their sensitivities to ecological risks or their risk-inducing capabilities. The system sampling method was applied to make the risk spatial variable. After sampling, the semi-variance analysis and block Kriging were conducted to render the map of ecological risk distribution. As a result, four categories of ecological risk ranging from very intense to light were formed according to comprehensive ecological risk index. The result indicated that almost 21.3% of the study area was predicted to be under very intense and intense-risk zones
