Ecological safety assessment of Dishui Lake and its diversion channels based on PSR model
HU Jingyang
YUAN Lin
CHEN Yan
ZHANG Yu
XUE Junzeng
CHEN Chong
CHEN Jiajie
HU Qianye
Abstract：Ecological safety construction is an important foundation for our country to achieve sustain-able development.No research has been carried out for the ecological safety of Dishui Lake and its di-version channels including many rivers and dense water networks.In this study,we constructed an eco-logical safety evaluation index system suitable for the Dazhi River-Dishui Lake basin based on the water environment monitoring data collected at 23 sampling points from Sept.2018 to Aug.2020 and the PSR model.During the evaluation of the ecological security status,relevant methods such as principal component analysis(PCA)and entropy method weighting were used.The evaluation results showed that the ecological safety level of the water diversion source area of Dazhi River is at level Ⅱ,which is relatively unsafe;the ecological safety level of the main urban area of Lingang New City is at level Ⅲ,which is in a critically safe state;the ecological safety level of the Dishui Lake area is at level Ⅲ,which is in a critically safe state.Comprehensive assessment of the ecological safety level of the Dazhi River-Dishui Lake Basin covering the Dishui Lake and its diversion channels is at level Ⅲ,which is in a criti-cally safe state.
Keywords：Dazhi River-Dishui Lake Basinecological securityPSR modelprincipal component analy-sisentropy Method
Publication Date：2023-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 133-141 )