Entropy-Weighted TOPSIS-Based Ecological Environment Driving Factors in the Chaohu Lake Rim Region Temporal and Spatial Differentiation Study

Abstract

Chaohu Lake is the fifth biggest freshwater lake in China and one of the “Three Rivers and Three Lakes” in the country-wide water air pollution prevention and control plan. The complete cure of Chaohu Lake is a key task in Hefei City. This study takes the ecological surroundings of the Chaohu Lake region as the precedent and selects 21 warning signs from 4 aspects, namely, air quality, meteorological indicators, water resources, and ecological land, and establishes the assessment gadget of ecological surroundings in the Chaohu Lake area. The entropy weight TOPSIS approach and ArcMap10.7 analyze the ecological surroundings, using elements and spatial differentiation traits of every region to act as references for the ecological surroundings, administration, and preservation of the ring Chaohu Lake region. The outcomes of the study are: 1) the basic ecological surroundings of the circum-Chao Lake vicinity (Feidong County, Feixi County, Lujiang County, Baohe District, Chaohu City) used to be negatively impacted all through 2018-2022, declined drastically in 2019, and remained essentially flat in the following period; 2) in the five-year complete comparative analyses of every location in the circum-Chao Lake vicinity, the typical ecological surroundings of Chaohu City and Baohe District was the worst and Lujiang County was the best, followed by Feidong County and Feixi County; 3) through a 12-month evaluation of the ecological surroundings, modifications in the areas around Chaohu Lake from 2018-2022, the ecological surroundings of the Baohe District and Chaohu City suggests an upward trend, and Feixi County indicates a small downward trend in 2022; 4) evaluating the weighting coefficients of every index, the annual common attention of nitrogen dioxide (C3), annual common attention of sulfur dioxide, common annual awareness (C4), common annual temperature (C9), and irrigated vicinity of arable land (C14) are the 4 main factors having an impact on the ecological environment.