广西北部湾经济区土地利用生态风险评价

Ecological Risk Assessment of Land Use in Guangxi Beibu Gulf Economic Zone

土地资源的生态环境日益受到人们的关注。作为广西经济发展的龙头,广西北部湾经济区土地利用的深度及广度不断扩大,生态环境不断遭到破坏。基于改进的RRM模型,从生态风险源,生态风险受体及生态风险响应三要素构建生态风险评价指标体系,并运用主成分分析方法对广西北部湾经济区土地利用生态风险进行评价。结果显示,广西北部湾经济区的土地利用生态风险以中等生态风险为主,15个评价单元中有6个为中等生态风险,占40%,分别为马山县、上林县、武鸣县、横县、合浦县以及东兴县。此外,高生态风险有北海市市辖区及宾阳县,较高生态风险有南宁市市辖区、隆安县及灵山县,较低生态风险有钦州市市辖区、浦北县及上思县,低生态风险有防城港市市辖区。

People are increasingly concerned about the ecological environment of land resources. As Guan-gxi economic development is in the lead,land use in depth and bZone has been continuously expanded and the ecological environment has been destroyed. Thus the ecological risk assessment index system was constructed involving the ecological risk source？ the eand the ecological risk response based on the improved RRM model, using the pmethod to evaluate the ecological risk of land use in Guangxi Beibu Guff Economicthat the ecological risk of land use in Guangxi Beibu Guff Economic Zone isrisk. Six of the 15 evaluation units are medium ecological risk,accounting for 40 %, the medium ecologicalrisk areas including Mashan county Shanglin county,Wuming county,Hengxian county,Hepu county and Dongxing county. In addition, the high ecological r isk areas inc luding Beihai ci ty and Binyang county, thehigher ecological risk areas including Nanning city,Longan county and Lingshan county the lower ecological risk areas including Qinzhou city,Pubei county and Shangi county. Only Fangchenggang city is at the lowEcological risk.