于子铖,赵进勇,彭文启,张晶,丁洋,付意成

• 1:河北工程大学河北省智慧水利重点实验室
• 2:河北工程大学水利水电学院
• 3:中国水利水电科学研究院水生态环境所

摘要(Abstract)：

【目的】小水电建设为我国带来社会经济效益的同时，部分流域无序开发、密集建设导致河流生境遭到破坏。为了明确水文地貌-生态响应关系，为科学进行小水电河流整改与生态修复提供指导，【方法】以大宁河巫溪段为研究区域，以实地调研数据为基础，结合有关分析工作，选取水深、流速、地貌单元类型及异质性指数为水文地貌指标，以底栖动物多样性指数为生态指标，利用冗余分析、拟合分析等数理统计方法，探讨分析了小水电河流的水文地貌-生态响应关系。【结果】结果显示：小水电密集开发影响了底栖动物的群落结构；水深、地貌单元多样性指数、流速为底栖动物多样性主要影响因子，贡献率分别为73.7%、18.2%、2.5%,水文地貌指标与Shannon多样性、Simpson多样性指数的关系更为显著，拟合度均高于0.4;滑水的底栖动物多样性较好，3个多样性指数平均值可达1.4,深潭的底栖动物多样性较差，仅为0.82。【结论】结果表明：小水电开发改变了河流天然的水文地貌过程，明晰小水电河流水文地貌-生态的定量化响应关系，可推求关键过程的生态阈值区间，从而为受损河段的生态修复提供理论支撑。

关键词(KeyWords)： 小水电;水文地貌;底栖动物;大宁河

Abstract:

Keywords:

基金项目(Foundation): 中国水科院创新团队专项(WE0145B042021);; 国家自然科学基金(51509271)

作者(Author): 于子铖,赵进勇,彭文启,张晶,丁洋,付意成

DOI: 10.13928/j.cnki.wrahe.2023.06.012

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