基于弯道二次流修正模型的大辽河潮流界时空变化模拟

基于ELADI算法的平面二维水环境模型WESC2D,定量研究大辽河潮区界与潮流界的时空变化规律。在模拟和验证大辽河潮位变化过程基础上,通过数值试验系统地模拟分析了上游径流量及汇流比、下游潮差和海平面上升对大辽河潮区界与潮流界的影响规律,并以1999年—2009年水文过程为条件定量研究大辽河潮流界的年、月变化及潮流界位置出现频率。结果表明,径流是影响大辽河潮区界与潮流界位置的主要因素,大辽河潮流界远远超过三岔河。

Spatio-temporal Characteristics of Tidal Limit and Tidal Current Limit of Daliaohe River Based on a Modified Model

In this paper ,temporal and spatial variation of tidal limit and tidal current limit in Daliaohe River was quanti-tatively analyzed by a new two-dimensional water environment model based on the Eulerian-Lagrangian alternating direc-tion implicit method .With the effects of upstream runoff and discharge ratio ,downstream tidal range and sea level rise on tidal limit and tidal current limit as well as annual and monthly changes and occurrence frequency of tidal current limit in Daliaohe River under the condition of hydrological processes during 1999 and 2009 were numerically simulated and quan-titatively analyzed .The results show that runoff is the major factor affecting the location of tidal limit and tidal current limit of Daliaohe River .