Study On Spatiotemporal Evolution Of Ecological Security Of Henan Water Source Area In The Middle Route Of South-to-North Water Transfer Project And Water And Land Conservation Regulation Measures

In recent years,with the increasingly prominent global ecological environment problems,ecological security is a new challenge facing humankind and has become a research hotspot today.The South-to-North Water Transfer Project is a major water transfer project in China,which can alleviate the problems in North China and the Beijing-Tianjin-Hebei region.Water shortages have changed the problem of uneven spatial and temporal distribution of water resources in China.Xichuan,Xixia,Dengzhou and Neixiang of Nanyang;Lushi of Sanmenxia and Luanchuan of Luoyang are important water diversion sources for the center line project.The ecological security of water source area is of great significance to whether the middle route project can run for a long time.This paper takes Henan water source area of the Middle Route Project of South-to-North Water Transfer as the research object,and uses the PSR model to select 29 and 24 indicators respectively to build a township(town)and county-level ecological security evaluation index system.Then,the ecological security assessment of water source areas was carried out at the township(town)and county levels,and control measures were proposed.The research results show that the overall ecological security situation of the Henan water source area in the center line is generally improving,but the overall level is not high and needs to be improved.The ecological security situation has obvious spatial distribution differences,showing a spatial distribution pattern in the north and south,and the overall quality of ecological security.It is upstream> middle reaches> downstream;the spatial distribution characteristics of the comprehensive ecological security value of the water source area are positively correlated with the elevation values,and negatively correlated with the spatial distribution of population density.Changes in time have a positive correlation with economic development.Contrast analysis between scales The overall distribution and trend of different scales of ecological security in the water source area are consistent.The small scale has a high degree of spatial recognition and the large scale has a low degree of spatial recognition.A multi-sector joint protection mechanism should be established when measures are taken To continue to improve the level of ecological security in the study area.