Studyon Risk Zoningof Geological Environment Problemsin Coastal Zonesof Hebei Province

The geological environment is a balanced open system composed of lithosphere,hydrosphere and atmospheric circle,providing resources and places for human survival,reproduction and various activities.The coastal zone is rich in resources and convenient in transportation.It is an important area for human society and economic development.Human activities and coastal geological environment together constitute a complex system.Since the reform and opening up,the steady development of society and economy has put forward higher requirements for the geological environment of China’s coastal zone.The natural role and increasing human activities have destroyed the original balance of the geological environment system.The geological environment has begun to have problems,which restricts China.Social and economic development in the coastal zone.In order to stabilize social and economic development,prevent and control geological environment problems,it is of great significance to conduct a full study on the dangers of geological environment problems in China’s coastal zones.A large number of studies have shown that the impact of coastal development on geological environmental problems has become the biggest factor outside the geological force,and the geological environment problems do not exist alone,and there is an interaction between the various problems.In this paper,from the perspective of geology and disaster science,the research on the impact of the development of coastal zones in Hebei Province on geological environmental problems and the study on the risk zoning of geological environment problems in the coastal zone of Hebei Province are carried out.The main research processes are as follows:(1)Organizing and analyzing a large amount of data,summarizing 8 kinds of geological environment problems in the coastal zone of Hebei Province,considering the historical research level and prevention and repair efforts,it is concluded that the four major geological environmental problems in the coastal zone of Hebei Province are ground subsidence.Groundwater pollution,seawater intrusion and coastal intrusion,and the status of the four geological environmental problems were analyzed.(2)Collecting the initial influence degree by expert survey method,using SPSS 22.0 software to process the numerical value,and studying the influence degree of the development of coastal zone in Hebei Province on geological environment problems according to the extended blind number theory.According to the calculation results,the influence of coastal zone development on land subsidence in Hebei Province is medium,the impact on groundwater pollution is large,and the impact on seawater intrusion and coastal erosion is small.(3)Considering the impact of the development of coastal zones in Hebei Province on geological environmental problems,using the index weighting method,the initial geological environmental problems of land subsidence,groundwater pollution,seawater intrusion and coastal erosion are carried out,and the initial danger is drawn by using GIS technology.Sex map.The interaction relationship between geological environment problems is analyzed.Based on the risk zoning of a single geological environment problem,a multi-question coupling risk assessment model based on trigger relationship is established.The risk zoning under multi-issue coupling is applied.GIS technology is applied.Draw a coupling risk zoning map.The GIS technology is used to spatially superimpose the four hazard zoning of geological environment problems.According to the superposition value “maximum value” method,the comprehensive risk hazard zoning map of the geological environment problems in the coastal zone of Hebei Province is drawn,and the zoning map is compared with the existing zoning map..The results show that the model can reflect the coupling risk of different geological environment problems affected by other problems,and the various risk maps are clearly defined,which is consistent with the geological environment of the coastal zone of Hebei Province.