基于SCHISM的钱塘江河口弯道环流数值模拟

黄姿菡; 程文龙; 李志永; 朱润野; 张芝永; 陈甫源

doi:10.11988/ckyyb.20250465

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长江科学院院报 ›› 2025 DOI: 10.11988/ckyyb.20250465

基于SCHISM的钱塘江河口弯道环流数值模拟

黄姿菡 ¹ ,
程文龙 ¹^,² ,
李志永 ¹ ,
朱润野 ¹ ,
张芝永 ¹^,² ,
陈甫源 ¹^,²

作者信息 +

Numerical Simulation of Curved Channel Circulation in the Qiantang River Estuary Based on SCHISM

HUANG Zi-han ¹ ,
CHENG Wen-long ¹^,² ,
LI Zhi-yong ¹ ,
ZHU Run-ye ¹ ,
ZHANG Zhi-yong ¹^,² ,
CHEN Fu-yuan ¹^,²

Author information +

文章历史 +

摘要

为研究强潮河口弯道的环流规律，基于SCHISM建立钱塘江河口闻堰河段三维水动力数学模型，计算研究了洪水及潮水期闻堰弯道的纵向流速、水位横比降及环流强度时空分布，分析了弯道环流模型的计算效率。结果表明：SCHISM对强潮河口弯道水流模拟具有较好的适用性和高效性。强潮河口弯道横比降在涨潮期随潮变化剧烈，且存在双峰现象，落潮期变化相对平缓，最大横比降远小于涨潮；弯道环流强度分布呈现弯顶大、两端小；一般情况下弯道横比降和环流强度主要由潮水控制。

Abstract

To investigate the circulation patterns in curved channels of macrotidal estuaries, a three-dimensional hydrodynamic model of the Wenyan reach in the Qiantang River Estuary was established using SCHISM. The temporal and spatial distributions of longitudinal velocity, transverse water surface slope, and circulation intensity in the Wenyan bend were simulated and analyzed during both flood and tidal periods. The computational efficiency of the curved-channel circulation model was also evaluated. The results demonstrate that SCHISM exhibits good applicability and high efficiency in simulating flow in curved channels of macrotidal estuaries. The transverse slope in the bend varies significantly with tidal fluctuations during flood tide, showing a bimodal pattern, Whereas its variation is relatively mild during ebb tide, with the maximum transverse slope being significantly smaller than that during flood tide. The circulation intensity is higher near the bend apex and decreases toward both ends. Under typical conditions, both the transverse slope and circulation intensity in the bend are primarily governed by tidal dynamics.

导出引用

黄姿菡, 程文龙, 李志永, 等. 基于SCHISM的钱塘江河口弯道环流数值模拟[J]. 长江科学院院报. 2025 https://doi.org/10.11988/ckyyb.20250465

HUANG Zi-han, CHENG Wen-long, LI Zhi-yong, et al. Numerical Simulation of Curved Channel Circulation in the Qiantang River Estuary Based on SCHISM[J]. Journal of Changjiang River Scientific Research Institute. 2025 https://doi.org/10.11988/ckyyb.20250465

中图分类号： P731.2

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