梯形透空丁坝局部水动力特性对底栖动物生境演替的影响机制
作者:
作者单位:

(1.长沙理工大学水利与环境工程学院,湖南 长沙 410114;2. 长沙理工大学洞庭湖水环境治理与生态修复湖南省重点实验室,湖南 长沙 410114;3.南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏 南京 210029;4.南京水利科学研究院港口航道泥沙工程交通行业重点实验室,江苏 南京 210029)

作者简介:

常留红(1979—),女,副教授,博士,主要从事水工结构与水生态修复研究。E-mail:claire886@163.com

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中图分类号:

TV863

基金项目:

国家重点研发计划(2021YFC3200401);湖南省自然科学基金(2021JJ30703);国家自然科学基金(51809022)


Influence mechanism of local hydrodynamic characteristics of trapezoidal hollow spur dike on benthos habitat succession
Author:
Affiliation:

(1.School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China;2.Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha University of Science & Technology, Changsha 410114,China;3.State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China;4.Key Laboratory of Port, Waterway & Sedimentation Engineering Ministry of Communications, PRC, Nanjing Hydraulic Research Institute, Nanjing 210029, China)

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    摘要:

    针对因梯形透空丁坝局部水动力特性对底栖动物栖息地的影响机制尚不明确,限制了此类结构的大范围推广应用的问题,依托长江深水航道建设的示范应用工程,构建三维水动力数值模型,选择中华绒螯蟹为指示物种,研究了不同径流条件下梯形透空丁坝局部水动力特性及其对指示物种栖息地的影响;结合梯形透空丁坝不同时期沉积物和底栖动物的监测数据,分析了梯形透空丁坝对底栖动物生境演替的影响机制。结果表明:梯形透空丁坝迎流面产生的上升流将主流引导至丁坝后上方,在汛期为中华绒螯蟹提供了避洪场所;坝内及坝后较小的流速和丰富的流场结构为中华绒螯蟹提供了索饵场和越冬场。

    Abstract:

    The impact mechanism of trapezoidal hollow spur dike on benthos habitat due to local hydrodynamic characteristics is still unclear, which limits the large-scale promotion and application of such structures. Relying on the demonstration application project of the Yangtze River deep-water channel construction, a three-dimensional hydrodynamic numerical model was established, and the Chinese mitten crab was selected as the indicator species to study the local three-dimensional hydrodynamic characteristics of trapezoidal hollow spur dike under different runoff conditions and their impact on the habitat of the indicator species. Combined with the data analysis of sediment and benthos monitoring in different periods of trapezoidal hollow spur dike, the impact mechanism of trapezoidal hollow spur dike on benthos habitat succession was revealed. The results show that the upwelling generated on the upstream face of the trapezoidal hollow spur dike leads the mainstream to the upper part behind the dike, providing a flood shelter for Chinese mitten crab in the flood season. The small flow velocity and abundant flow field structure in and behind the dike provide feeding grounds and overwintering grounds for Chinese mitten crabs.

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常留红,王瀚锐,章富君,等.梯形透空丁坝局部水动力特性对底栖动物生境演替的影响机制[J].水资源保护,2023,39(1):216-224.(CHANG Liuhong, WANG Hanrui, ZHANG Fujun, et al. Influence mechanism of local hydrodynamic characteristics of trapezoidal hollow spur dike on benthos habitat succession[J]. Water Resources Protection,2023,39(1):216-224.(in Chinese))

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  • 收稿日期:2021-09-29
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  • 在线发布日期: 2023-01-21
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