River Flood Characteristics Along the Canal Area Effected By Hanzhuang Canal Jacking

Abstract

In this paper, flood characteristics along the canal area effected by Hanzhuang Canal jacking are studied. By coupling the rainfall runoff (NAM) model with the hydrodynamic (HD) model, a 1-D hydrologic-hydrodynamic coupling model was built. On the basis of parameter calibration and model validation, different flood simulation schemes are drawn up, and the influence range of Hanzhuang Canal jacking and the flood characteristics of tributaries affected by Hanzhuang Canal jacking are analyzed respectively. The results show that with the increasing discharge of Hanzhuang Canal, the water level of Hanzhuang canal rises gradually, the main stream flood flows upstream along the tributaries, the water level of the tributaries rises gradually, and the risk of flood disasters increases. Among the tributaries, Taogou River is most affected by Hanzhuang Canal jacking and has the highest risk of flood disaster, followed by Dasha River, Dasha River Floodway and Sizhi Ditch. The results also show that the backwater of Hanzhuang Canal on the tributaries is mainly reflected in the influence on the upstream flood water level process, but has little or no influence on the flood discharge process, which can provide a reference for regional flood control and scheduling department.