Spatial-Temporal Evolution and Obstacle Diagnosis of Water Ecological Security in the Middle Reaches of Yangtze River
Reasonable evaluation of the spatial-temporal evolution of water ecological security in the middle reaches of Yangtze River and a-nalysis of its influencing factors can provide references for the construction of water ecological security barriers in the middle reaches of Yan-gtze River.The evaluation index system of regional water ecological security was established based on PSR model,and the water ecological security status of the middle reaches of Yangtze River from 2011 to 2020 was evaluated by entropy weight method.The obstacle factors of wa-ter ecological security were analyzed combined with the obstacle degree model and countermeasures were proposed.The results show that the comprehensive index of water ecological security of the middle reaches of the Yangtze River has increased from 0.348 3 in 2011 to 0.434 0 in 2020,showing an overall upward trend.The ranking result of water ecological security obstacle degree of the middle reaches of Yangtze River is response＞status＞pressure,and it is comprehensively affected by scientific and technological expenditure,ecological water consumption,per capita water resources,fixed assets investment and industrial water consumption.The spatial correlation of water ecological security in the middle reaches of Yangtze River is positive,and it shows the characteristics of aggregation distribution in the region.The water ecological se-curity level of the provinces in the middle reaches of Yangtze River is mostly close to the critical safety level,and there is still a big gap be-tween reaching the basic safety level.
water ecological securityPSR modelobstacle modeloptimize the pathmiddle reaches of Yangtze River
国家科技期刊平台
NSTL
万方数据
