Spatial-temporal discrimination for the urban eco-security evaluation in Xinjiang Kunyu

YUAN Ye;WU Wenli;FU Zongchi;HUANG Chunbo;CHU Guangming;Agriculture College, Shihezi University;School of Geography and Information Engineering, China University of Geosciences;

new cities in XPCC;;ecological safety assessment;;PSR model;;GIS;;Kunyu City

The importance of ecological security in protecting artificial oasis cities in extreme arid areas respond to the ecological environmental threats has become increasingly prominent.This study took Kunyu City, a new city of the rapid urbanization in Xinjiang production and construction corps(XPCC) as the research object, maked full use of the advantages of remote sensing technology and GIS,and selected 9 key ecological factors closely related to its ecological security to build a PSR model, For Kunyu city comprehensive evaluation of the urban eco-security level in the past five years from 2014 to 2018.The results showed that: 1.From 2014 to 2018,the ecological safety of Kunyu City increased significantly, the area of higher ecological safety increased by 4.5%,and the area of low ecological safety decreased by 9.31%,showing a steadily increasing trend year by year, but The overall level is still low. 2.The spatial distribution of ecological security in Kunyu City has been quite different in the past five years.The level of ecological security in the northwest has increased significantly, showing a spatial distribution characteristic of “high in the middle of the municipality and low in the southwest”.The degree of ecological safety decreases from the inside to the outside around the outer protection forest of the city.3.The proportion of Grade IV response area dropped from 33.25% to 21.24%,It shows that the desertification control measures promoted in 2016 have significantly improved the ecological security level of Kunyu City, which can be used as a decision support for the optimization of regional ecological security in the future.