省道S221线大埔县段公路改建工程生态风险评价

Ecological Risk Assessment of the Reconstruction Project of Dapu County Section of Provincial Highway S221

采用问题提出-风险分析-风险表征风险评价框架,以不同类型道路工程为风险源,以拟建道路影响的生态系统为评价受体,耦合风险源强度、受体脆弱性、危害性定量与定性分析方法,开展省道S221线大埔县段公路改建工程生态风险评价。结果表明,公路边坡滑坡、水土流失、水环境和生物入侵生态风险值依次为0.48、0.65、0.22和0.76,相应风险水平分别为一般、较大、较小和较大。

Adopting the risk assessment framework of problem proposal-risk analysis-risk characterization,taking different types of road projects as risk sources,the ecosystem affected by the proposed road as assessment entities,coupling the intensity of risk sources,vulnerability of entities,quantitative&qualitative analysis methods of hazards,the ecological risk assessment of the reconstruction project of Dapu County Section of Provincial Highway S221 was conducted.Result shows that the ecological risk values of slope landslide,soil erosion,water environment&biological invasion is 0.48,0.65,0.22&0.76 respectively,and the corresponding risk levels is medium,larger,smaller&larger respectively.