丁坝布置形式对中小河流栖息地影响的数值模拟研究
发布时间：2018-12-17 13:08
【摘要】：丁坝是广泛使用的河道整治和维护建筑物。同时,丁坝又具有保护水生态多样性和改善河流栖息地的功能。丁坝周围水流具有较强的紊动特性,不同的丁坝布置形式对河流流态、水沙结构影响较大,进而影响河流水生生物的栖息地演变。为摸清何种丁坝布置形式对栖息地改善最为有利,基于IFIM理论,将二维浅水模型、泥沙运动和河床演变模型与栖息地加权可用面积计算模型耦合,探讨了不同丁坝布置形式对中小河流典型鱼类栖息地的改善作用。结果表明,采用对口丁坝布置形式时流场对称性强、流态较好,可得到较优的栖息地可用面积WUA,研究成果也可为河流水生态修复与管理提供一定参考。
[Abstract]:Spur dike is widely used for river regulation and maintenance of buildings. At the same time, it has the function of protecting water ecological diversity and improving river habitat. The flow around the spur dike has a strong turbulent characteristic. Different dike arrangement forms have a great influence on the river flow state and the structure of water and sediment, and then affect the habitat evolution of aquatic organisms in the river. In order to find out which type of dike layout is most beneficial to habitat improvement, based on IFIM theory, the two-dimensional shallow water model, sediment movement model and riverbed evolution model are coupled with the habitat weighted available area model. The improvement of typical fish habitat in medium and small rivers by different groin arrangement was discussed. The results show that the symmetry of flow field is strong and the flow pattern is better when the matching spur dike is adopted. The results of WUA, study on the available area of habitat can also provide a certain reference for the ecological restoration and management of river water.
【作者单位】： 贵州省水利水电勘测设计研究院;四川大学水力学与山区河流开发保护国家重点实验室;
【基金】：国家自然科学基金(51379137,51579162)
【分类号】：Q958;TV147.5;TV64
本文编号：2384240
[Abstract]:Spur dike is widely used for river regulation and maintenance of buildings. At the same time, it has the function of protecting water ecological diversity and improving river habitat. The flow around the spur dike has a strong turbulent characteristic. Different dike arrangement forms have a great influence on the river flow state and the structure of water and sediment, and then affect the habitat evolution of aquatic organisms in the river. In order to find out which type of dike layout is most beneficial to habitat improvement, based on IFIM theory, the two-dimensional shallow water model, sediment movement model and riverbed evolution model are coupled with the habitat weighted available area model. The improvement of typical fish habitat in medium and small rivers by different groin arrangement was discussed. The results show that the symmetry of flow field is strong and the flow pattern is better when the matching spur dike is adopted. The results of WUA, study on the available area of habitat can also provide a certain reference for the ecological restoration and management of river water.
【作者单位】： 贵州省水利水电勘测设计研究院;四川大学水力学与山区河流开发保护国家重点实验室;
【基金】：国家自然科学基金(51379137,51579162)
【分类号】：Q958;TV147.5;TV64
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