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[1]Wang Shiwei,Wu Wei.Spatiotemporal Variation of Ecological Environmental Quality and Its Response to Different Driving Factors in Jialing River Basin in Recent 31 Years[J].Research of Soil and Water Conservation,2024,31(01):427-439.[doi:10.13869/j.cnki.rswc.2024.01.005]

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Spatiotemporal Variation of Ecological Environmental Quality and Its Response to Different Driving Factors in Jialing River Basin in Recent 31 Years

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 01 Page number: 427-439 Column: Public date: 2024-02-20

Title:: Spatiotemporal Variation of Ecological Environmental Quality and Its Response to Different Driving Factors in Jialing River Basin in Recent 31 Years

Author(s):: Wang Shiwei¹, Wu Wei²; (1.Hubei University of Automotive Technology, Shiyan, Hubei 442002, China; 2.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China)

Keywords:: ecological environmental quality; land use; topographic factor; climate factors; Jialing River Basin

CLC:: TP79, X87; X826; S7; Q948

DOI:: 10.13869/j.cnki.rswc.2024.01.005

Abstract:: [Objective] The continuous promotion of urbanization has brought increasing pressure on the ecological environment of the Jialing River Basin. The multi-directional, objective, accurate and rapid measurement of regional ecological environment quality is a key point of ecological research. [Methods] Landsat data and the remote sensing ecological index(RSEI)coupled with greenness, humidity, dryness and heat were used to explore the temporal and spatial evolution of the ecological environment quality of the Jialing River basin and its sensitivity to human activities, topography and meteorological changes in different time periods from 1990 to 2020. [Results](1)The Jialing River Basin had been in a good trend in the past 31 years. The overall ecological environment quality had been improving, The slope rate of RSEI linear change was 0.000 3/a. Before 2003, the ecological environment change in the Jialing River Basin was relatively stable, and after 2003, it showed a trend of decreasing first and then increasing.(2)The change of ecological environment quality in more than 50% of the region was not obvious. However, from 1990 to 1995, the ecological environment quality in the north of Longnan and the east of Dazhou showed a degradation trend, while some areas in Pingwu showed an improvement trend. From 1995 to 2000, there was the scattered areas with slight degradation trend in Suining. From 2005 to 2010, areas south of Nanchong and north of Guangyuan showed a slight improvement trend. From 2010 to 2020, the Diebu region has a slight degradation trend.(3)The impact of population and GDP on the quality of the ecological environment had a downward trend over time. Land use, elevation, slope and precipitation had a small impact on the quality of the ecological environment before 2015, and the impact on the ecological environment had an increasing trend after 2015. The impact of temperature and wind speed on the ecological environment increased sharply in 1995 and 2015.(4)The interaction between topographic factors and meteorological and land use factors had a greater impact on the ecological environment quality of the Jialing River Basin, and the interaction of any two factors was greater than the impact of a single factor on the ecological environment quality of the Jialing River Basin. [Conclusion] The interaction between GDP and any two factors has the least impact on the ecological environment quality of the Jialing River Basin. The ecological environment quality of the study area was greatly affected by human activities before 2015, but the impact of natural factors gradually increased after 2015. However, the overall ecological environment quality of the study area had improved, benefiting from the city's attention and investment in the ecological environment in recent years.

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Last Update: 2024-02-20