水道港口2017，Vol.38Issue(2)：132-136,187,6.
感潮河段单站等时距水位非线性优化预报模型
Nonlinear optimal forecast model of water level at time knots with constant time interval from a single station of tidal reach
摘要
Abstract
The current water level forecast models of tidal reach are subject to the observation data of water lev-el from the current tidal reach station, the runoff stations upstream and the tide stations downstream. It leads to the problems as follows:the leading time is subject to the time of the flow from the upstream;if the data at the upstream or the downstream are missed, the forecast would not be able to proceed;the acquisition of the data is high in cost. Assuming that the water level of tidal reach was linearly controlled by the runoff and tide, the paper built a nonlin-ear optimal forecast model with respect to one dynamic correction coefficient of runoff and a set of tidal harmonic co-efficients, which was based on the water level at time knots with constant time interval from a single station. Then, combining the curve fitting least square method, the harmonic analysis method and the gradient descent method, an iterative algorithm was proposed for solving the forecast model. The model was applied to some stations of the tidal reach of Yangtze River for test. Numerical experiences show the feasible and applicable of the model.关键词
等时距/感潮河段/潮汐调和分析/非线性优化预报模型Key words
time knots with constant time interval/tidal reach/tidal harmonic analysis/nonlinear optimal fore-cast model分类
建筑与水利引用本文复制引用
王如云,李丹,周钧,汪天..感潮河段单站等时距水位非线性优化预报模型[J].水道港口,2017,38(2):132-136,187,6.基金项目
中国江苏省水利科技重点项目(2010500312) （2010500312）
中央高校基本科研业务费专项资金(2014B06314) （2014B06314）
