摘要
环状河道在平原地区水系中非常常见 ,分汊河道也较常见 ,对这两种河道基于Preissmann格式的水流计算提出了可行的方法。对圣维南方程组进行离散后 ,用追赶法对各河道进行演算 ,由水量平衡原理对各结点进行计算 ,就可求得河道各断面的水流情况。用长江下游江阴至青龙港及杨林段河道的实例进行计算 ,取得了较为理想的效果。
River channels are often connected each other to form a reticular river channel or divided into two or more branches in plain areas. The numerical methods based on the Preissmann implicit scheme for flow simulation in these channels are discussed in this paper. After the derivation of the Saint-Venant Equations, water level and discharge of each cress-section are derived by the recursion method and the principle of water balance. The method is proved to be satisfactory when applied to the flow calculation in reach from Jiangyin to Qinglonggang and Yanglin in downstream of Yangtze River.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2001年第4期485-490,共6页
Advances in Water Science
