长江流域生态环境质量的时空演变特征及其驱动因素

刘华东; 何贞铭; 郭琛

doi:10.13961/j.cnki.stbctb.2023.02.032

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长江流域生态环境质量的时空演变特征及其驱动因素

试验研究

- 长江流域生态环境质量的时空演变特征及其驱动因素
- Spatiotemporal Variation and Driving Factors of Ecological Environment Quality in Yangtze River Basin
- 水土保持通报 2023年43卷第2期页码：277-284
- 作者机构：
  
  长江大学地球科学学院,湖北,武汉,430100
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目“青藏高原及周边2002—2015地下水储量变化的分离研究”(42004007)
- DOI：10.13961/j.cnki.stbctb.2023.02.032
  中图分类号： X87;TP79;X826
- 纸质出版：2023
- 稿件说明：
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刘华东, 何贞铭, 郭琛. 长江流域生态环境质量的时空演变特征及其驱动因素[J]. 水土保持通报, 2023,43(2):277-284.

Liu Huadong, He Zhenming, Guo Chen. Spatiotemporal Variation and Driving Factors of Ecological Environment Quality in Yangtze River Basin[J]. Bulletin of Soiland Water Conservation, 2023, 43(2): 277-284.
刘华东, 何贞铭, 郭琛. 长江流域生态环境质量的时空演变特征及其驱动因素[J]. 水土保持通报, 2023,43(2):277-284. DOI： 10.13961/j.cnki.stbctb.2023.02.032.

Liu Huadong, He Zhenming, Guo Chen. Spatiotemporal Variation and Driving Factors of Ecological Environment Quality in Yangtze River Basin[J]. Bulletin of Soiland Water Conservation, 2023, 43(2): 277-284. DOI： 10.13961/j.cnki.stbctb.2023.02.032.

摘要

[目的] 探究2001—2021年长江不同子流域生态环境质量动态变化及其主导驱动因素，以期为长江流域生态环境保护与经济发展战略的协调发展提供理论依据。 [方法] 基于MODIS数据提取了2001—2021年5—11月长江流域遥感生态指数(remote sensing ecological index， RSEI)，并基于RSEI分析了长江流域近21 a来生态环境质量动态及其驱动因素。 [结果] ①长江流域中下游生态质量高于上游，南部高于北部。除2006年外，生态质量在中等级以上的面积占80%以上，整体生态水平较好。 ②生态环境质量变化整体以稳定变化为主，呈上升趋势的区域有乌江、太湖水系、宜宾至宜昌、宜宾至湖口、金沙江流域。 ③RSEI变化的主要驱动因素为湿度指标，其次为温度指数。 ④生态环境质量受到风速的正影响较大。气温升高会导致长江流域生态环境质量变差，但在金沙江流域、鄱阳湖流域、嘉陵江流域和湖口及以下干流地区气温升高有利于生态环境质量改善。⑤降水增多有利于大部分地区生态环境质量改善。[结论] 2001—2021年流域生态环境质量整体以不变趋势为主，但嘉陵江流域生态呈现退化现象需要引起政府重视，尽快提出一系列生态修复措施，防止其生态环境进一步恶化。

Abstract

[Objective] The dynamic changes of ecological environmental quality in different sub-basins of the Yangtze River from 2001 to 2021

and the impact of different driving factors on it were determined in order to provide a theoretical basis for the coordinated development of an ecological environmental protection strategy and an economic development strategy for the Yangtze River basin. [Methods] Based on MODIS data

the remote sensing ecological index (RSEI) of the Yangtze River basin from May to November (2001 to 2021) was extracted. The dynamics and driving factors of ecological environmental quality in the Yangtze River basin during the past 21 years were analyzed based on RSEI values. [Results] ① The ecological quality of the middle and lower reaches of the Yangtze River basin was higher than the ecological quality of the upper reaches. The ecological quality in the south was higher than in the north. Except for 2006

more than 80% of the study area had ecological quality above the middle level

and the overall ecological level was classified as good. ② The overall change in ecological environmental quality was classified as stable

and the regions with an upward trend in quality included the Wujiang River

the Taihu Lake water system

Yibin to Yichang section

Yibin to Hukou section

and the Jinsha River basin. ③ The main driving factor of RSEI change was the humidity index

followed by temperature indicators. ④ Ecological environmental quality was greatly affected by wind speed. Rising temperatures will lead to deterioration of the ecological environmental quality in the Yangtze River basin

but the temperatures in the Jinsha River basin

Poyang Lake basin

Jialing River basin

and Hukou and the lower main stream areas were conducive to improvement of ecological environmental quality. ⑤ Increasing precipitation was conducive to improvement of ecological environmental quality in most areas. [Conclusion] The overall ecological environmental quality of the Yangtze River basin has not changed during the past 21 years

but the ecological degradation of the Jialing River basin needs to be given attention by the government

and a series of ecological restoration measures should be put forward as soon as possible to prevent further deterioration of the ecological environment.

关键词

Keywords

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