张晔,侯精明,张玉蓉,等. 漂流河段水动力数值模拟研究[J]. 水利水运工程学报,2021(6):73-79. doi: 10.12170/20210120005
引用本文: 张晔,侯精明,张玉蓉,等. 漂流河段水动力数值模拟研究[J]. 水利水运工程学报,2021(6):73-79. doi: 10.12170/20210120005
(ZHANG Ye, HOU Jingming, ZHANG Yurong, et al. Study on hydrodynamic numerical simulation of drift reach[J]. Hydro-Science and Engineering, 2021(6): 73-79. (in Chinese)). doi: 10.12170/20210120005
Citation: (ZHANG Ye, HOU Jingming, ZHANG Yurong, et al. Study on hydrodynamic numerical simulation of drift reach[J]. Hydro-Science and Engineering, 2021(6): 73-79. (in Chinese)). doi: 10.12170/20210120005

漂流河段水动力数值模拟研究

Study on hydrodynamic numerical simulation of drift reach

  • 摘要: 为了给水利枢纽下游河道整治规划提供技术支撑并提出漂流供水方案,采用二维全水动力模型,对水利枢纽下游河道整治前后不同泄水工况进行模拟。以三河口水利枢纽下游河道为例,河道两侧风景优美且暗礁险滩较少,河床高程为514~526 m,河床砂卵石层厚度5~10 m,为实施漂流项目提供了保证,结合上游水利枢纽调度运行情况,计算了各个泄水工况下不同断面的水力要素及相关统计信息,并根据计算结果提出河道整治及漂流供水方案。结果表明,该二维水动力模型能高效高精度对水利枢纽下游河道进行不同泄水工况下的模拟,为河道水上娱乐设施规划提供了有效的技术支撑,并从节约水资源及减少工程施工量的角度建议对河道进行6 m疏浚,在此工况下上游水利枢纽仅需泄水4 m3/s,此时河床断面最大水深最小值为0.50 m,断面水面最小宽度为4 m,断面最小流速为1.02 m/s。

     

    Abstract: In order to provide technical support for river regulation planning and propose drifting water supply scheme in the lower reaches of water conservancy projects, a two-dimensional full hydrodynamic model is adopted to simulate the different conditions with the river regulation or not. The downstream river channel of Sanhekou Water Control Project is taken as an example, where are the beautiful scenery on both sides of the river channel and few dangerous banks of submerged reefs. The elevation of the river bed is generally about 514~526 m, and the thickness of the sand and pebble layer of the river bed is 5~10 m, which provides a guarantee for the implementation of the rafting project. Based on the operation of the upstream water conservancy, hydraulic elements and related statistics on different cross sections were calculated under each working condition of drainage, which is beneficial to putting forward the drift river regulation and water supply scheme. The results show that the two-dimensional hydrodynamic model can successfully simulate the downstream river channel of a water conservancy project with high efficiency and high accuracy under different discharge conditions, and provide effective technical support for the planning of river water entertainment facilities. For saving water resources and reducing the amount of engineering construction, the dredging width of the river channel should be 6 m. Under this working condition, the upstream water conservancy project only needs to discharge 4 m3/s. The minimum water depth of the cross-sections is 0.50 m, the minimum water surface width is 4 m, and the minimum flow velocity is 1.02 m/s.

     

/

返回文章
返回