Characteristics of evolution and ecological restoration of ecological elements in counties in Three Gorges Reservoir Area

YAN Luyu; PAN Feifei; ZHOU Yan; LI Zhengtian

doi:10.13300/j.cnki.hnlkxb.2026.01.015

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Characteristics of evolution and ecological restoration of ecological elements in counties in Three Gorges Reservoir Area

High-quality development of urban-rural with green integration | 更新时间：2026-11-05

- Characteristics of evolution and ecological restoration of ecological elements in counties in Three Gorges Reservoir Area
- Journal of Huazhong Agricultural University Vol. 45, Issue 1, Pages: 167-179(2026)
- 作者机构：
  
  1.武汉大学城市设计学院/湖北省人居环境工程研究中心，武汉 430072
  2.长江勘测规划设计研究有限责任公司，武汉 430010
  3.湖北省美术学院环境艺术学院，武汉 430205
- 作者简介：
- 基金信息：
- DOI：10.13300/j.cnki.hnlkxb.2026.01.015
  CLC： X176
- Received：12 June 2025，
  
  Published：15 January 2026
- 稿件说明：
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闫璐雨，潘菲菲，周燕，等.三峡库区县域生态要素的演变特征及生态修复［J］.华中农业大学学报，2026，45（1）：167‐179.

YAN Luyu,PAN Feifei,ZHOU Yan,et al.Characteristics of evolution and ecological restoration of ecological elements in counties in Three Gorges Reservoir Area[J].Journal of Huazhong Agricultural University,2026,45(01):167-179.
闫璐雨，潘菲菲，周燕，等.三峡库区县域生态要素的演变特征及生态修复［J］.华中农业大学学报，2026，45（1）：167‐179. DOI： 10.13300/j.cnki.hnlkxb.2026.01.015.

YAN Luyu,PAN Feifei,ZHOU Yan,et al.Characteristics of evolution and ecological restoration of ecological elements in counties in Three Gorges Reservoir Area[J].Journal of Huazhong Agricultural University,2026,45(01):167-179. DOI： 10.13300/j.cnki.hnlkxb.2026.01.015.

摘要

为保护和修复三峡库区城市的生态安全，以重庆市忠县为研究对象，基于形态学空间格局分析（morphological spatial pattern analysis，MSPA）方法、电路理论和生态系统服务和权衡的综合评估（integrated valuation of ecosystem services and trade-offs，InVEST）模型识别忠县2000—2020年3个时期的生态网络与生境质量水平，探究库区城市生态要素的时空变化特征，针对性地提出生态保护红线优化策略。结果显示：随时间推移忠县整体生态环境呈向好趋势，生态源地数量从12个增加至48个，面积从131.13 km²增长至351.03 km²，中部源地分布密集。廊道由23条增加至112条，长度由191.55 km上升至314.94 km后波动下降至292.99 km，空间上呈北密南疏、东密西疏的分布特征。3期生境质量指数分别为0.331 1、0.384 1、0.381 6，呈现先升高后小幅降低趋势，整体生境质量有所提升；林地资源丰富的中部地区生境质量较高，长江两岸及中心城区生境质量较差。生态网络要素与生境质量水平的空间分布和变化存在协同耦合关系，受用地结构变化的影响最显著。对源地实行分区管控策略并优化生态保护红线边界，调整后红线区面积为124.72 km²，同时划定125.57 km²的补划区和189.81 km²的储备区。

Abstract

The Three Gorges Reservoir Area（TGRA） serves as a crucial ecological barrier in the upper reaches of the Yangtze River and represents a typically ecology-sensitive region. Studying the dynamic characteristics of urban ecological elements in the reservoir area is of significant importance for maintaining ecological security and implementing ecological restoration in the region. The morphological spatial pattern analysis（MSPA）， circuit theory， and the InVEST model were used to identify the ecological networks and quality of habitat in Zhongxian County， Chongqing Municipality in three periods from 2000 to 2020 to protect and restore the ecological security of cities in TGRA. The characteristics of spatiotemporal evolution of ecological elements in the reservoir area were studied and strategies for the targeted optimization of ecological protection redline（EPR） were proposed. The results showed that the overall ecological environment in Zhongxian County had a positive trend over time， with the number of ecological sources increasing from 12 to 48， the area growing from 131.13 km ² to 351.03 km ²， and the source area was densely distributed in the central region. The number of ecological corridors increased from 23 to 112， with the length of corridor increasing from 191.55 km to 314.94 km before fluctuating to 292.99 km， with a spatial distribution pattern of dense in the north and sparse in the south， and dense in the east and sparse in west. The index for the quality of habitat in the three periods was 0.331 1， 0.384 1， and 0.381 6， with an initial increase followed by a slight decrease， indicating an overall improvement in the quality of habitat. The quality of habitat in the central regions rich in forest resources was relatively high， while that on along both banks of the Yangtze River and in the central urban area was poorer. There was a synergistic coupling relationship between the spatial distribution and changes of elements in ecological networks and the quality of habitat， most significantly affected by changes in the structure of land use. A strategy for zoned management of ecological sources was implemented， alongside the optimization of EPR boundaries. After adjustment， the designated EPR area covers 124.72 km²， with a compensation zone of 125.57 km² and a reserve zone of 189.81 km². It will provide a scientific reference for promoting the green development with high-quality in integrated urban-rural zones within the TGRA under the Yangtze River Conservation Initiative.

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CHEN Shuaipeng

CHEN Shi

Related Institution

Hubei Provincial Habitat Engineering Technology Research Center

Hubei Province Planning， Design and Research Institute Co.， Ltd

Department of Urban and Rural Planning，School of Urban Design，Wuhan University

Research Centre for Territorial Spatial Governance and Green Development，Huazhong Agricultural University

College of Landscape Architecture and Horticulture，Wuhan Univesity of Bioengineering

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