基于TOPSIS法的河南省土地生态安全时空演变特征分析OA

Conducting the measurement of land ecological security is an important premise and foundation for scientifically assessing the regional land ecological security situation and defining the sustainable utilization of regional land resources.By constructing an evaluation index system for land ecological security in Henan Province from three dimensions,namely,pressure,state and response,the TOPSIS method was used to measure the land ecological security level of Henan Province from 2013 to 2023.The results show thatthe overall level of land ecological security in Henan Province showed a fluctuating and slow upward trend during the study period.The land ecological security levels of various cities were between the dangerous level and the subsecure level,remaining in a moderately low state.From the perspective of the development indices of each subsystem,the pressure,state and response levels of the land ecological system in various cities of Henan Province showed a slow growth trend from 2013 to 2018,but a downward trend appeared in 2023,indicating poor stability of land ecological security.In terms of spatial distribution pattern,the land ecological security level in Henan Province showed an obvious gradient distribution characteristic of"high in the southeast and low in the north-west".The number of cities reaching the sub-secure level in Eastern Henan and Southern Henan has continuedto increase in recent years.Henan Province should focus on promoting the improvement of land ecological security level by formulating an overall ecological security plan,building an ecological security risk early-warning and monitoring platform,and constructing a regional coordinated development system and mechanism.