doi:10.16186/j.cnki.1673-9787.2020.6.11

Received:2020/03/12

Revised:2020/04/26

Published:2020/11/15

Study on the change of eco-environmental vulnerability in the upperreaches of Minjiang River

YAO Kun1, ZHOU Bing2, HE Lei3, LI Yuxia4, CHEN Jianbin1, XIANG Hengxing5

1.College of Resource and Environment， Xichang University， Xichang  615000 ， Sichuan， China;2.Climate Service Room ， National Climate Center， Beijing  100081 ， China;3.School of Software Engineering， Chengdu University of Information Technology， Chengdu  610103 ， Sichuan， China;4.School of Automation Engineering， University of Electronic Science and Technology of China ， Chengdu  610054 ， Sichuan， China;5.Northeast Institute of Geography and Agroecology， China Academy of Sciences， Changchun  130102 ， Jilin， China

Abstract:In order to obtain the change of ecological environment vulnerability in the upper reaches of Minjiang River， the evaluation index system was constructed from topography， climate， vegetation and other aspects. RS， GIS technology and entropy combination weight model were combined to evaluate and analyze the ecological environment vulnerability in this region from 2000 to 2015. The main achievements were as follows ： （1） the ecological environment vulnerability of this area showed a relatively high change state in the west and a relatively low change state in the east in the whole ； （2） the proportion of grid in each vulnerable area was different， the fineness and weight occupied the maximum and minimum ends， and the proportion of mild， potential and micro showed the change of decreasing in turn ；（3） the grid ratio of the moderate and above vulnerable areas was only about 20% ， and the mild and below areas accounted for the vast majority， which objectively reflected that the overall ecological environment was at a moderate level ；（4） in the past 15 years， the vulnerability composite index was 2. 591 6 ，2.571 0 ，2.571 9 and 2. 537 3 ， respectively， and the overall quality of ecological environment quality was improved ；（ 5 ） the driving force analysis showed that the implementation of a series of environmental protection measures had promoted its overall improvement， and the construction of a large number of hydropower bases had also caused interference with the changes in small parts of the region ；（ 6 ） according to different regions， the implementation of different protection and restoration and reconstruction measures would contribute to the improvement of the ecological environment.

Key words:eco-environmental vulnerability;RS;GIS;entropy combination weight model;upper reaches of Minjiang

岷江上游地区生态环境脆弱性变化研究_姚昆.pdf