白洋淀水系结构连通性评价
Structural Connectivity Evaluation of the Baiyangdian Lake Water System
投稿时间:2020-05-26  修订日期:2020-09-24
中文关键词:白洋淀  水系结构  连通性  稳定性
英文关键词:Baiyangdian Lake  water system structure  connectivity  stability
基金项目:国家重点研发计划项目(2017YFC0404504);国家自然科学基金创新研究群体项目(51721093);水体污染控制与治理科技重大专项(2018ZX07110001)
作者单位E-mail
高婷 北京师范大学环境学院 水环境模拟国家重点实验室 北京 100875 13121169839@163.com 
尹心安 北京师范大学环境学院 水环境模拟国家重点实验室 北京 100875  
何 山 北京师范大学环境学院 水环境模拟国家重点实验室 北京 100875  
赵彦伟 北京师范大学环境学院 水环境模拟国家重点实验室 北京 100875  
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中文摘要:
      水系结构连通性评价是实现河湖连通的基础,能为构建生态水网、提升水体连续性提供决策依据。鉴于现有评价方法多集中于连通概率及强度方面,忽略了结构稳定性的评估,为有效探究水系在外界干扰下的连通稳定程度及科学指导水资源开发利用,以白洋淀为例,基于网络分析法,将湖泊概化为节点,河流通道概化为边,考虑水网稳定性,建立包括水面率、水系连通度及水系结构稳定性三大要素,共7个指标的评价体系,采用熵权法与层次分析法耦合赋权及综合指数评价法,评估淀区水系结构连通性。结果表明,较之2007年,2017年淀区综合连通指数由0.7524下降至0.4235,区域孤立湖泊增多,连通强度及结构稳定性皆有所降低。
英文摘要:
      Evaluation of the structural connectivity of water systems is the basis for connecting rivers and lakes and provides scientific evidence to support decision-making for constructing ecological water networks and connecting water bodies. Previous studies focused primarily on evaluating connection probability and strength, and ignored evaluation of structural stability. Here, we took Baiyangdian Lake as a case study and the structural connectivity of the water system was evaluated based on complex analysis of the network and a comprehensive evaluation index. The aim of the study was to explore the connection stability of the Baiyangdian water system under external interference and provide scientific guidance for the development and utilization of water resources. Quickbird satellite images from May 2007 and GF-2 satellite images from January 2017 were selected as the data source, and the connectivity of the Baiyangdian Lake was visualized as a network structure. The evaluation system consisted of seven indicators of water surface ratio, water system connectivity and water system structural stability. The weighting of each index factor was calculated using the entropy method and analytic hierarchy process, and the comprehensive connectivity index of Baiyangdian Lake was then calculated using a generalized network of Baiyangdian water system in 2007 and 2017. Results show that the lake area of the Baiyangdian Lake system in 2017 was 2.4 times that in 2007 and the number of lakes in the system increased from 26 to 33, but the number of river channels decreased from 74 to 57. The lakes added were primarily in the western area of the Baiyangdian Lake system, and most were isolated, without a channel allowing for exchange of material and energy. In general, the structural connectivity of the Baiyangdian Lake system in 2017 decreased compared to 2007, and the comprehensive connectivity index dropped from 0.7524 to 0.4235. Except for the small increase in water surface ratio, the strength and stability of connectivity had weakened.
高婷,尹心安,何 山,赵彦伟.2020.白洋淀水系结构连通性评价[J].水生态学杂志,41(5):63-69.
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