Spatiotemporal evolution of eco-environmental quality based on multi-temporal remote sensing ecological index: A Case Study of Yufeng District, Liuzhou City

doi:10.14088/j.cnki.issn0439-8114.2025.10.028

Abstract

Abstract: Taking Yufeng District of Liuzhou City, Guangxi as the study area, the eco-environmental quality was comprehensively evaluated using multi-temporal Landsat data by constructing a remote sensing ecological index (RSEI) model. Remote sensing images from similar months in 2015, 2018, and 2022 were selected to extract four ecological factors: greenness, wetness, dryness, and heat, and the RSEI model was constructed using principal component analysis. The results showed that the RSEI of Yufeng District exhibited an increasing trend year by year, rising from 0.17 in 2015 to 0.48 in 2022. In 2015, the area with fair grade accounted for the largest proportion (30.76%); in 2018, the area with good grade accounted for the largest proportion (24.46%); and in 2022, the area with good grade accounted for the largest proportion (41.08%), indicating that the eco-environment of Yufeng District entered a stage of overall improvement. In 2022, areas with excellent and good grades were distributed in the northern, eastern, and central-southern parts of Yufeng District, with their areas increased compared to 2015 and 2018. Areas with fair and poor grades were distributed in the central, southwestern parts, and some residential areas of Yufeng District.Areas with bad grade were reduced and sporadically distributed throughout the district. Over the two time spans of 2015—2018 and 2015—2022, the areas with improved eco-environment in Yufeng District were more than those with deteriorated conditions, indicating that the eco-environment of the district maintained a positive trend of overall improvement.

Key words: multi-temporal remote sensing, ecological index (RSEI), eco-environmental quality, spatiotemporal evolution, Yufeng District of Liuzhou City

CLC Number:

X826

YU Peng-cheng, REN Ci, LI Xiao-long, LUO Lei, XIAO Jian-lin, ZHAO Yi-tong, HE Xin-le. Spatiotemporal evolution of eco-environmental quality based on multi-temporal remote sensing ecological index: A Case Study of Yufeng District, Liuzhou City[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(10): 184-189.

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