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Arid Land Geography ›› 2023, Vol. 46 ›› Issue (10): 1654-1662.doi: 10.12118/j.issn.1000-6060.2022.634

• Ecology and Environment • Previous Articles     Next Articles

Land ecological quality and its change trend prediction in the Yellow River Basin from 2000 to 2020

LIU Jiaqi1(),ZHOU Luhong1,2(),XI Xiaoya1   

  1. 1. School of Land Engineering, Chang’an University, Xi’an 710054, Shaanxi, China
    2. Key Laboratory of Land Improvement of Shaanxi Province, Xi’an 710054, Shaanxi, China
  • Received:2022-12-01 Revised:2023-01-29 Online:2023-10-25 Published:2023-11-10

Abstract:

This paper constructs an index system for evaluating land ecological quality in the Yellow River Basin in terms of ecological basis, ecological structures, ecological benefits, ecological stresses, and evaluates the land ecological quality of the basin from 2000 to 2020 by using the ideal point method. On this basis, we combined the Slope trend prediction model and F significance test model to predict the change trends of land ecological quality in the basin in 2025, and analyzed the clustering characteristics of the predicted change trends. The results show that: (1) The land ecological quality in the southeastern and southwestern parts of the Yellow River Basin is higher than that in the northeastern and northwestern parts. (2) The overall land ecological quality of the Yellow River Basin is low from 2000 to 2020, but shows a gradual improvement from the southeast to the northwest. (3) The quality of the middle and upper reaches of the Yellow River Basin, where the background land ecological quality is poor, has much room for improvement. (4) Land ecological quality in the Yellow River Basin may rise in 2025 is mainly concentrated in the eastern and central part of the Gansu section and the southern part of the Ningxia section of the basin, located in the Loess Plateau ecological function protection zone. The cases where the ecological quality of land is likely to decline are partly clustered in the southwestern part of the Qinghai section of the basin in the Yellow River source ecological function reserve, and partly in the northwestern part of the Inner Mongolia section of the basin. The northwestern part of the Yellow River Basin should continue to promote ecological treatment, laying the ecological foundation for regional high-quality development, and the southeastern part of the basin should continue to promote economic development while strengthening ecological protection and monitoring, so as to achieve the benign development of mutual promotion of economy and ecology.

Key words: land ecological quality, ideal point method, Slope trend prediction model, the Yellow River Basin