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[1]LI Ping,YE Hui,TAN Shucheng.Evaluation of Geological Hazards in Yongde County Based on Analytic Hierarchy Process[J].Research of Soil and Water Conservation,2021,28(05):394-399.

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Evaluation of Geological Hazards in Yongde County Based on Analytic Hierarchy Process

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 05 Page number: 394-399 Column: Public date: 2021-08-20

Title:: Evaluation of Geological Hazards in Yongde County Based on Analytic Hierarchy Process

Author(s):: LI Ping¹,YE Hui²,TAN Shucheng¹; (1.College of Earth Sciences,Yunnan University,Kunming 650500,China; 2.College of Tourism and Geographic Sciences,Yunnan Normal University,Kunming 650500,China)

Keywords:: geological hazards; susceptibility evaluation; analytic hierarchy process(AHP); Yongde County

CLC:: K909; X43

DOI:: -

Abstract:: In order to comprehensively analyze and evaluate the susceptibility of geological disasters,Yongde County was selected as the research area,and 14 index factors closely related to geological disasters were selected from the three aspects of geological environment,geographic environment,and human engineering activities to construct geological hazard susceptibility evaluation index system of Yongde County,and the analytic hierarchy process was used to calculate the weight of each index and element layer by combining with the spatial analysis function of GIS,the susceptibility of geological hazards in Yongde County was evaluated and the accuracy of the evaluation results was verified. The results show that:(1)the geological hazards in Yongde County are generally in a moderately prone state; the medium prone area is 1 386.01 km²,accounting for 44.09% of the county's area,and the high prone area is 852.51 km²,accounting for 27.13% of the county's area,which distribute in Dedang Town,Yongkang Town,Chonggang Township and Mengban Township in Yongde County;(2)the mudstone,sandstone,slate and other rocks with relatively soft texture and well-developed joint fissures expose in the high-prone areas of geological disasters in Yongde County; the rocks are weathered and broken under the influence of various internal and external stresses,such as flowing water erosion,wind erosion,and geological tectonic movement,which provided a material source for the development of geological disasters;(3)the success rate curve and ROC curve are used to evaluate the results,respectively; in the test,the AUC value of the success rate curve test result is 0.79,and the AUC value of the ROC curve is 0.87; the test result has good accuracy,indicating that the analytic hierarchy process is suitable for the assessment of the susceptibility of geological disasters in Yongde County.

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Last Update: 2021-08-20