Evaluation of Geological Environmental Carrying Capacity of Gongyi City Based on Random Forest Approach
This article took Gongyi City,Henan Province,a typical geological environment fragile area in the middle and lower reaches of the Yellow River as an example.Multiple methods such as remote sensing surface deformation monitoring technology,random forest method and GIS technology were comprehensively used to select 20 evaluation indicators covering four aspects of geomorphic environment,geological en-vironment,ecological environment and social environment.A geological environment carrying capacity evaluation system was established in the study area.The Analytic Hierarchy Process Coefficient of Variation Combination Weighting Method(AHP-CV)and Random Forest(RF)algorithm were used to determine the weights of each evaluation factor.Combined with GIS spatial analysis,the geological environment carry-ing capacity of Gongyi City was analyzed.An evaluation was conducted and the evaluation results of geological environmental carrying capacity were optimized based on the risk level of geological hazards and hidden danger points.The results show that the AHP-CV and RF bearing ca-pacity evaluation results are basically consistent.The RF model improves the reliability of geological environment bearing capacity evaluation,and the prediction results are more scientific and accurate,which can be better applied to geological environment bearing capacity evaluation.The optimized evaluation results based on the risk levels of geological hazards and hidden danger points can effectively improve the accuracy of the evaluation results.The geological hazard risk zoning,engineering geological rock formations,loess collapsibility and degree of mining area damage are the main obstacle factors affecting the improvement of geological environment bearing capacity in the study area;The eastern and southern parts of Gongyi City are affected by mining activities,resulting in frequent geological disasters and poor bearing capacity.It is recommended to timely carry out ecological restoration and geological disaster prevention and control in mines.The bearing capacity of the northeast and northwest regions is poor,mainly constrained by geological disasters and loess collapsibility.It is recommended to carry out wa-ter loss and geological disaster monitoring and control.
geological environment carrying capacityrandom forestscombination weighting methodMiddle and Lower Yellow RiverGongyi City
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