【摘要】：丁壩是廣泛使用的河道整治和維護(hù)建筑物。同時(shí),丁壩又具有保護(hù)水生態(tài)多樣性和改善河流棲息地的功能。丁壩周圍水流具有較強(qiáng)的紊動(dòng)特性,不同的丁壩布置形式對(duì)河流流態(tài)、水沙結(jié)構(gòu)影響較大,進(jìn)而影響河流水生生物的棲息地演變。為摸清何種丁壩布置形式對(duì)棲息地改善最為有利,基于IFIM理論,將二維淺水模型、泥沙運(yùn)動(dòng)和河床演變模型與棲息地加權(quán)可用面積計(jì)算模型耦合,探討了不同丁壩布置形式對(duì)中小河流典型魚類棲息地的改善作用。結(jié)果表明,采用對(duì)口丁壩布置形式時(shí)流場對(duì)稱性強(qiáng)、流態(tài)較好,可得到較優(yōu)的棲息地可用面積WUA,研究成果也可為河流水生態(tài)修復(fù)與管理提供一定參考。
[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.
【作者單位】： 貴州省水利水電勘測設(shè)計(jì)研究院;四川大學(xué)水力學(xué)與山區(qū)河流開發(fā)保護(hù)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(51379137,51579162)
【分類號(hào)】：Q958;TV147.5;TV64

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