天然河流弯道不同生态治理方案的数值模拟研究

发布时间：2018-04-14 03:05

本文选题：河流弯道 + 生态治理　；参考：《水电能源科学》2017年01期

【摘要】：针对鲁北平原区天然河道污染、河道冲淤损坏严重的现状,结合流域河道生态综合整治工程,选用MIKE21软件,建立基于非正交网格的平原区天然河流弯道二维水动力数值模型,模拟天然河流弯道纵横向的流速及水面线特征分布,绘制弯道流速矢量场,得出天然河流弯道的河床及河岸边坡冲刷、落淤分布符合实际情况;结合土壤生物工程技术,提出四种生态治理方案并进行数值模拟,引入鲤鱼流速适宜指数法对治理方案的生态效果进行评价。结果表明,方案4中水流流速趋于均匀分布,对弯道生态治理效果最为显著,生态丁坝在弯道生态治理中起到重要作用。
[Abstract]:Aiming at the current situation of natural channel pollution and serious erosion and siltation damage in Lubei Plain region, a two-dimensional hydrodynamic numerical model of natural river bends in plain area based on non-orthogonal grid is established by using MIKE21 software in combination with the river ecological comprehensive regulation project in the basin.By simulating the characteristic distribution of flow velocity and water surface line of natural river bend, drawing the curve velocity vector field, it is concluded that the river bed and riverbank slope of natural river bend are scoured and silt distribution accords with the actual situation, and combined with soil bioengineering technology, the distribution of river bed and riverside slope of natural river bend is in line with the actual situation.Four ecological control schemes were put forward and numerical simulation was carried out, and the ecological effect of the control scheme was evaluated by introducing the suitable index of carp velocity.The results show that the flow velocity tends to be uniformly distributed in scheme 4, which has the most remarkable effect on the ecological control of bends, and ecological groin plays an important role in the ecological treatment of bends.
【作者单位】：山东大学土建与水利学院;山东省海河流域水利管理局;
【基金】：山东省重大水利科研项目(SDSLKY201207,SDSLKY201302)
【分类号】：TV147;TV85

【相似文献】