基于AHP-Topsis的南通市环境灾害风险评价

Risk Assessment on Environmental Disaster in Nantong City Based on AHP-Topsis Method

从环境灾害风险的脆弱性、暴露性与恢复能力3个方面,构建了江苏省南通市环境灾害风险评价的指标体系。基于Topsis方法,应用AHP方法赋权,对南通环境灾害风险的区域差异进行了分析。结果表明,南通市7个不同区域的环境灾害风险差异较大,海安风险最小,而如皋风险最大,风险由小到大的顺序依次为:海安<海门<通州区<南通市区<如东<启东<如皋。环境风险的主要原因在于工业化与城市化影响下工业"三废"对环境的潜在影响,以及环保投入的力度等。因此,南通市应减少人为环境影响,增加环保投入,以降低环境灾害风险。

Based on the three aspects of vulnerability,exposure and resilience for the environmental risks,an assessment system on environmental disaster was constructed for Nantong City.The regional disparity of environmental disaster risk was analyzed by using a combinative method of Topsis and AHP.Results show that environmental disaster risk varies greatly in the 7different regions in Nantong city.The spatial risk can be ranged in the increasing sequenced of Haian,Haimen,Tongzou district,Main city of Nantong,Rudong and Qidong,where the minimum risk occurs in Haian while the maximum in Rugao.Potential influence factors are waste air emission,waste water and waste solid,which are caused by the industrialization and the urbanization,as well as the environmental investment are the major reason for the environmental risk.Thus,in order to reduce the environmental risk in Nantong city,the reduction of human activities on the environment and more investment on the environment could be an effective way.