基于标量有限体积法的灌溉末级渠系非恒定水流模型  

Unsteady Water flow Numerical Model for Irrigation Final Canal System Based on Scalar Finite-volume Method

作　　者：章少辉[1,2] 刘群昌[1,2] 白美健[1,2] 徐景东[1,2] 

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [2]a中国水利水电科学研究院国家节水灌溉北京工程技术研究中心,北京100048

出　　处：《灌溉排水学报》2013年第3期1-5,共5页Journal of Irrigation and Drainage

基　　金：国家科技支撑课题(2011BAD25B04);国家自然科学基金项目(51209277);中国水利水电科学研究院科研专项(节集1212)

摘　　要：通过区分明渠非恒定流中对流波与重力波属于不同的物理过程,把渠道非恒定流控制方程进行了变形处理,基于标量有限体积法构建了具备高精度和分辨率的灌溉末级渠系非恒定流数值模型。基于文献数据及野外实测数据,对模型的模拟性能进行了验证。结果表明,构建的模型模拟的斗渠和农渠水位值与实测值之间的平均相对误差为2.8%～4.1%,水量平衡误差不大于0.07%,具备良好的模拟性能,为开展末级渠系布置模式及管理研究提供了可靠的数值工具。The advection and diffusion process was specified for unsteady water flow in open channel and the corresponding governing equation was reformulated. Then the unsteady water flow numerical model of final canal system with high accuracy and resolution was proposed based on the scalar finite-volume meth- od. According to the data from references, the proposed model was validated. Results showed that the proposed model could well simulate the unsteady water flow in final canal system with the average relative errors between observed data and simulated data of 2. 8; ; 4. 1; and the water balance error below 0.07; for two typical experimental examples. Correspondingly, the proposed unsteady water flow numer- ical model had well simulation performance and provided a good tool for the distribution mode research of final canal system and basin.

关 键 词：末级渠系 非恒定流 标量有限体积法 精度 分辨率 

分 类 号：S274.2[农业科学—农业水土工程]