Evaluation Of Geological Environment Carrying Capacity In Coastal Area ——Take Dalian Jin Pu New Area As An Example

Jin Pu New Area is located in the central and southern part of Dalian city.It is one of the typical coastal landforms in China,and the geological environment background is complicated.With the economic development of Jin Pu New Area has entered the stage of vigorous stage,the degree of geological environment transformation in the region is constantly improving,and the pressure of geological environment is gradually increasing.The evaluation of geological environment carrying capacity is an important form to judge the excellent state of geological environment at present.Therefore,the evaluation of geological environment carrying capacity of Jin Pu New Area can provide new thinking and basis for the planning of regional sustainable development of resources and environment,and has certain practical significance.Based on the project of "Dalian Coastal Zone Land and Sea integrated geological survey",this thesis summarizes the features of regional geological environment through the statistics and collation of topography and geomorphology,geological structure,meteorology and hydrology,social economy and other data,and builds the evaluation index system of geological environment carrying capacity of Jin Pu New Area.Mainly adopting analytic hierarchy process and comprehensive evaluation model,the carrying capacity of geological environment,ecological environment and social environment subsystem and comprehensive carrying capacity are studied and evaluated as follows:1.The connotation and features of geological environment carrying capacity are summed up,and the geological environment features of Jin Pu New Area are summarized through comparative study: the geological environment conditions are rich,and the tidal action of seawater and seawater intrusion have a significant impact on the geological environment composition in the long geological evolution process;The geological environment has destroyed during the production activities such as land reclamation,slope cutting and mining,which aggravates the carrying pressure of the geological environment to a certain extent and results in a series of geological environment problems.Social and economic status is the carrying object of geological environment.The development of territorial economy can reflect the development degree of geological environment,and is also an important factor affecting the carrying capacity and development potential of geological environment.2.On the basis of the actual geological background of the study area,combined with the AHP model as the framework of the evaluation index system,the geological environment,ecological environment and social environment are selected as the criterion layer for carrying capacity evaluation.The spatial grid data of each level of elements were established in Arc GIS platform with 17 indexes as index factor layers,including elevation,rock-soil features,structural stability,river buffer zone,vegetation coverage,seawater intrusion degree,street population density and economic density.The comprehensive weight of the index was determined by the subjective and objective combination weighting method,and the spatial distribution map of the elements at each level was generated after the objective state of the index elements was graded.3.The study of the carrying capacity of geological environment subsystem is low within the region mainly by "zigzag" glyph string centers distributed in rock mass is easy to erosion,the high density of geological disaster of Jinzhou fault and Dongjiagou near the fracture,the ecological environment carrying capacity,on the whole,the present low north meteorological characteristics of high and low around the middle,and the social environment carrying capacity of low concentration distribution in the southwest in the study area;The area with excellent comprehensive geological environment carrying capacity in Jin Pu New Area is relatively small,the potential of regional geological environment carrying capacity is low,and the internal differentiation is large.4.The state of geological environment carrying capacity is evaluated from the street scale of Jin Pu New Area,and the influencing factors of carrying capacity are discussed in many aspects,providing reference for refining regional protection measures;Based on the main function zoning of Dalian city,combining with the distribution features of territorial geological environment carrying capacity,the geological environment function zoning of Jin Pu New Area is completed,and corresponding suggestions on geological environment protection and territorial development are put forward.