沈阳地区过去30年环境风险时空格局的研究

Temporal and Spatial Patterns of Environmental Risk Events in the Past 30 Years in Shenyang City

应用“风险频数”及相关指标对沈阳地区过去３０年环境风险的时空格局进行了分析。结果表明：风险频数在１９６６—１９７７及１９７８—１９９１两个时段之间的分布存在极显著差异（ｔ＝－７．３５３，ｔ０．０１＝２．８０７）；过去３０年环境风险空间分布格局没有显著变化，但各亚区之间风险频数存在显著差异；沈阳地区存在一批高风险企业，化工行业是风险最高行业。

The index of 'risk frequency' and other relativeindices are used to analyze the temporal and spateal patterns of environmental risk events in thepast 30 yes in Shenyang city. The results showthat there existed an extremely significant variation in the risk frequency during the periods of1966-1977 and 1978-1979 (t=-7. 353, to.ol= 2. 807). During the past 30 years, there wasno significant variation in the spatial patterns ofthe evironmental risk, while the distribution ofenvironmental risk among the districts was extremely different. In Shenyang city, there existed a series of high-risk enterprises, and thechemical industry was of the highest risk.