Arid Zone Research ›› 2024, Vol. 41 ›› Issue (10): 1662-1671.doi: 10.13866/j.azr.2024.10.05

• Land and Water Resources • Previous Articles     Next Articles

Analysis of driving forces and dynamic evolution of water ecological security in the Gansu section of the Yellow River Basin

DAI Wenyuan1,2(), MA Jiucao1, CHEN Yichen1, ZHENG Zhixiang2, ZHANG Rui3, ZHANG Jiangke3   

  1. 1. Environmental Law College, Gansu University of Political Science and Law, Lanzhou 730070, Gansu, China
    2. Key Laboratory of Evidence Science Techniques Research and Application, Gansu Province, Lanzhou 730070, Gansu, China
    3. College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, Gansu, China
  • Received:2024-03-25 Revised:2024-06-20 Online:2024-10-15 Published:2024-10-14

Abstract:

This study constructed a water ecological security evaluation index system based on the W-SENCE perspective (a complex ecosystem integrating economy, society, and nature with water as the mainstay). Using statistical data from the Gansu section of the Yellow River Basin from 2003 to 2022, the Entropy-TOPSIS method, M-K analysis, and ARIMA model were used to analyze the driving forces and dynamic evolution trends of water ecological security in the Gansu section of the Yellow River Basin. The following results were obtained: (1) The ratio of runoff to pollution; reservoir regulation and storage capacity; the proportion of water consumption for forestry, animal husbandry, and fisheries; and the proportion of water consumption for farmland irrigation were the major driving factors for water ecological security in the basin. The social subsystem and ecological subsystem were the key driving factors for water ecological security. (2) From the perspective of spatial differences, the overall water ecological security status in the Gansu section of the Yellow River Basin was relatively poor (<Grade III), with the upstream consistently performing better than the downstream. The area from Lanzhou to Hekou is a key regulation zone. (3) In terms of dynamic evolution, a mutation occurred in the water ecological security status around 2013, followed by an improving trend. The section from Longyangxia to Lanzhou was a focus of attention. (4) The water ecological security status will continue to improve steadily from 2023 to 2034, with the risk of water ecological security being higher in the middle and downstream than in the middle and upstream. The area from Lanzhou to Hekou remains a key regulation zone.

Key words: W-SENCE, the entropy-TOPSIS method, dynamic evolutionary trends, water ecological security, Gansu section of Yellow River Basin