Diagnosis of eco-environmental quality in the Keluke Lake basin, China

doi:10.13287/j.1001-9332.202108.019

Abstract

Abstract: In order to clarify the eco-environmental quality and its evolution characteristics of Keluke Lake basin, we selected 15 factors of physical geography, meteorology, land use/cover and social economy using comprehensive investigation, remote sensing interpretation and inversion, statistical analysis and other technical means, based on the relevant theories of environmental ecology. We used factor analysis and entropy method to calculate the index weight, constructed watershed soil quality model and ecological environment quality diagnosis model, and analyzed the changes of soil and eco-environmental quality in the Keluke Lake basin in 2000, 2005, 2010 and 2015. The results showed that the average eco-environmental quality in four periods was 21, 47, 54, and 72, showing a stable upward trend. The eco-environmental quality level changed from poor to good, while soil quality was at the middle level. Spatially, the eco-environmental quality of the northern mountainous area, the downstream wetland and the surrounding area of the river improved significantly. The change of eco-environmental quality was a result of human activities and natural factors. Soil quality and lake area were key factors indicating the eco-environment of the Keluke Lake basin. The minimum ecological water demand of the Keluke Lake was the basic guarantee to maintain the benign development of the eco-environment of the lake basin.

Key words: ecological environment quality, soil quality, ecological environment diagnosis, remote sensing, Keluke Lake basin

WEN Guang-chao, SUN Shi-kui, LI Xing, XIE Hong-bo. Diagnosis of eco-environmental quality in the Keluke Lake basin, China[J]. Chinese Journal of Applied Ecology, 2021, 32(8): 2906-2914.

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