基于改进PSR模型的洞庭湖区生态安全评价及主要影响因素分析
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湖南农业大学生物科学技术学院

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基金项目:

湖南省重点研发计划项目(2019NK2011);国家自然科学基金项目(31870454)


Ecological security evaluation and main effects analysis around Dongting Lake based on the improved Pressure-State-Response model
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College of Bioscience and Biotechnology, Hunan Agricultural University

Fund Project:

Key Research and Development Project of Hunan Province (2019NK2011); National Natural Science Foundation of China (31870454)

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    摘要:

    洞庭湖区是长江经济带与华南经济圈的过渡带与重要结点,其生态安全在长江流域乃至全国的社会经济发展中起着重要的战略地位。本研究以洞庭湖区域常德市为例,基于层次分析与熵权法相结合确定指标权重的改进压力-状态-响应模型,综合评价了该区域的生态安全;利用灰色关联度方法对生态安全的主要影响因素进行了初步分析。结果表明:1)洞庭湖区域生态安全状况整体好转,在2013—2018年期间生态安全等级由“较不安全”上升到“较安全”,安全综合指数由0.301上升到0.603,压力指数呈轻微波动下降趋势,状态和响应指数均呈上升趋势;2)洞庭湖生态安全主要受工业废水排放量、保护区面积所占比例、空气质量指数优良率、人口密度等因素的影响,面临的主要问题为水资源短缺、水污染严重、产业结构不合理。建议在遵循人与自然和谐相处原则的基础上,严格管控废水排放,限制高耗水行业规模,构建科学合理的生态安全格局,探索洞庭湖湿地生态产品价值实现机制与途径。

    Abstract:

    The Dongting Lake region is the transitional zone and important node between the Yangtze River Economic Belt and the South China Economic Circle, and its ecological security plays an important strategic role in the socioeconomic development of the Yangtze River Basin and even the whole country. Taking the city of Changde in the Dongting Lake as an example in this paper, the ecological security of the region is comprehensively evaluated, through the improved Pressure-State-Response model based on AHP and entropy weight method to determine the index weight, and the main factors of impacting ecological security are analyzed by grey relational grade method. The results show that: 1) the whole ecological security in Dongting Lake region has been improved, the level of ecological security has increased from the level ofless secure to more secure during 2013-2018, and the comprehensive index of ecological security has increased from 0.301 to 0.603. The pressure index of ecological security in this study region was slightly decreased, whereas the state index and the response index of ecological security increased. 2) The ecological security of Dongting Lake is mainly affected by industrial wastewater discharge, proportion of protected area, excellent rate of air quality index, population density and other factors. The main problems in Dongting Lake are water shortage, serious water pollution and unreasonable industrial structure. For further ecological security improvement in Donting Lake, it is suggested to follow the principle of harmony between human and nature and should control the wastewater discharge strictly, limit the scale of high-water-consumption industry, optimize the ecological security pattern, and explore the mechanisms and pathways to realize the value of ecological products for Dongting Lake wetlands.

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呙亚玲,李巧云. 基于改进PSR模型的洞庭湖区生态安全评价及主要影响因素分析[J]. 农业现代化研究, 2021, 42(1): 132-141
GUO Ya-ling, LI Qiao-yun. Ecological security evaluation and main effects analysis around Dongting Lake based on the improved Pressure-State-Response model[J]. Research of Agricultural Modernization, 2021, 42(1): 132-141

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  • 收稿日期:2020-09-11
  • 最后修改日期:2021-01-11
  • 录用日期:2021-01-11
  • 在线发布日期: 2021-02-01
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