长江科学院院报2018，Vol.35Issue(5)：153-156,4.DOI:10.11988/ckyyb.20171037
三峡库区枝状河网水动力过程实时模拟
Real-time Simulation of Hydrodynamic Process in Dendritic River Network in Three Georges Reservoir Area
摘要
Abstract
A simple 1-D mathematical dendritic river network model of high precision which could rapidly realize the coupling between flow velocity and pressure is built based on Saint-Venant equations. Finite element volume method is employed to discretize equations of continuity, and semi-implicit θ to discretize the water level gradient term of free-surface elevation. Moreover,Eulerian-Lagrangian method is adopted to solve the advection term, and predic-tion-correction method to decompose the sparse linear system of dendritic river network to several tridiagonal sys-tems. The reach from Zhutuo to dam site of Three Gorges Project is taken as a case study. The model is calibrated and validated with measured historical data in 2005 and 2006,and the results demonstrate that the calculation er-rors of water level and discharge are generally within 10% and 5%,respectively. The results of mathematical model are in good accordance with measured data,indicating that the model is of high precision.In the single-core serial efficiency test,the model takes about 23.7 seconds to simulate the flow process of a year,which implies the real-time simulation of hydrodynamic process of dendritic river network in Three Georges reservoir area can be completed.关键词
三峡库区/枝状河网/一维水动力模型/水流速度/实时模拟Key words
Three Gorges reservoir area/dendritic river network/1-D hydrodynamic model/flow velocity/real-time simulation分类
建筑与水利引用本文复制引用
卢程伟,周建中,胡德超,张余龙..三峡库区枝状河网水动力过程实时模拟[J].长江科学院院报,2018,35(5):153-156,4.基金项目
国家自然科学基金重大研究计划重点项目(91547208) （91547208）
国家自然科学基金面上项目(51579107) （51579107）
中央高校基本科研业务费专项(2017KFYXJJ197) （2017KFYXJJ197）
三峡后续规划研究课题二(CKSG2016873/HL) （CKSG2016873/HL）
