Risk assessment of coastal geological hazards in Jiaodong peninsula,China based on analytic hierarchy process
The coastal zone is a fragile area affected by the global ecological environment and is extreme-ly sensitive to global changes.Due to the change of climate environment and the excessive exploitation of groundwater,coastal geological hazards such as coastal erosion and seawater intrusion in Jiaodong peninsula have gradually become a serious threat to the sustainable economic development and people's property security in this region.In this paper,based on the relevant data of coastal geological hazards in the coastal zone of Jiaodong peninsula,the qualitative analysis was carried out to determine that the main coastal geological hazards in this region were seawater intrusion and coastal erosion.On this ba-sis,the risk assessment index system was established by selecting representative indicators.The quan-titative risk assessment and GIS-based zoning of seawater intrusion and coastal erosion in Jiaodong pen-insula were then carried out.The results showed that the comprehensive risk level of seawater intrusion in Jiaodong peninsula was ranked from high to low as Qingdao,Weihai,south Yantai and north Yan-tai.The comprehensive risk level of coastal erosion was ranked from high to low as Qingdao,north Yantai,Weihai and south Yantai.Accordingly,this paper proposed to rationally exploit groundwater in Weihai city and Yantai city,to protect coastal sand mines and vegetation in north Yantai and to move sand making beaches,to strengthen coastal defense projects in Qingdao and to pay attention to the pre-disaster investment.
seawater intrusioncoastal erosionrisk assessment and zoningAHPJiaodong peninsula
NETL
NSTL
万方数据
