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A two-dimensional flow-ice-sediment coupled model for rivers I：Theory and methods

1，2 2 1 1
PAN Jiajia ，SHEN Hung Tao ，GUO Xinlei ，WANG Tao
（1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin，
China Institute of Water Resources and Hydropower Research，Beijing 100038，China；
2. Department of Civil and Environmental Engineering，Clarkson University，Potsdam，NY 13699-5710）

Abstract：Traditional flow and sediment research generally neglect the effect of ice-affected sediment trans⁃
port and riverbank erosion. However， ice effects are unavoidable in northern rivers considering ice jam
flooding，ice gouging，and abrasion on riverbanks. It is important to understand the complex flow-ice-sedi⁃
ment coupling mechanics in ice jam events. This study firstly reviews the theoretical progress in river ice re⁃
search in the last several decades. It then presents a two-dimensional flow-ice-sediment coupled model
with bank stability for Northern rivers. The model is constructed of flow and sediment transport module，riv⁃
er ice dynamic module， and bank erosion and mass failure module. Through the information exchange and
feedbacks between these three modules， the coupled model can simulate water level and discharge fluctua⁃
tions， dynamic ice floe transport， sediment transport， riverbed change， and bank erosion and failure. The
model combines theories of sediment transport and river ice， satisfying requirements of flow simulations for
both ice-free and ice-affected rivers for all seasons. It provides a new tool for northern river management
in preventing ice jam flooding. Such a study can contribute to the interdisciplinary research between flow hy⁃
draulics，river ice mechanics，and river dynamics.
Keywords： flow-ice-sediment model； northern rivers； flow and sediment movement； river ice dynamics；
riverbank stability
（责任编辑：李福田）

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