基于随机森林的生态地质环境承载力评价  

Bearing capacity evaluation of eco-geological environment with random forest method

作　　者：杜奥林 简季[1] DU Aolin;JIAN Ji(Chengdu University of Technology,Chengdu 610059,Sichuan,china)

机构地区：[1]成都理工大学,四川成都610059

出　　处：《城市地质》2023年第2期160-168,共9页Urban Geology

基　　金：国家重点研发计划课题(2021YFC3000401)资助。

摘　　要：城市发展是当下研究热点,了解一个城市的生态地质环境承载力,能衡量其地质-生态-经济的协调程度,对指导城市规划发展有重要意义。结合龙泉山城市森林公园环境现状,从地质环境、生态环境与社会经济3方面选取12个指标,利用随机森林优化主客观权重,测算区域生态地质环境承载力。研究结果表明:断裂密度与高程是龙泉山城市森林公园最重要的影响因子;研究区总体的生态地质环境承载力表现为中等,并呈中间低、两边高的分布形态,承载力较差的区域主要分布研究区中部,承载力较好的则分布于贾家镇、三岔镇及煎茶镇等区域;随机森林方法的评价结果准确性与可靠性更高,更适合此研究区的生态地质环境承载力评价。Urban development is a research hotspot at present,and understanding the bearing capacity of a city's eco-geological environment can measure its degree of geological-ecological-economic coordination,which is of great significance for guiding ur-ban planning and development.Based on the current situation of Longquan Mountain Urban Forest Park,this paper selects 12 in-dicators from the three aspects of geological environment,ecological environment and social economy,and uses the subjective and objective weights of random forest optimization to measure the bearing capacity of the regional eco-geological environment.The results show that the fault density and elevation are the most important influencing factors.The overall bearing capacity of the eco-geological environment in the study area is medium,with a distribution pattern of low bearing capacity in the middle and high bearing capacity on the sides.The random forest method used is highly accurate and reliable,and suitable for the evaluation of bearing capacity of the eco-geological environment in the study area.

关 键 词：环境承载力 随机森林 组合权重 龙泉山城市森林公园 

分 类 号：X826[环境科学与工程—环境工程] X141