东江中下游河道近期洪水水文情势变化分析

Change Analysis on Flood Water Regime of Middle and Downstream of the East River

针对近30年来东江大规模人工采砂导致的河床下切现象,对最新水文、地形资料进行整理分析,重点阐明近期东江河床变化和控制断面水位、流量关系曲线变化,构建东江中下游整体数学模型,计算分析东江中下游干流河道现状洪潮水面线变化,为东江中下游防洪减灾、河道整治和人类活动管控提供依据。

Specific to riverbed sapping of the East River caused by sand excavation in the past thirty years, newest hydrology and topography datum are analyzed. Recent change of riverbed, water level and flux relation of the control section in the East River are emphasisly clarified The whole mathematic model for middle and downstream of the East River is built. Computational analysis is made on the change of flood and tidal water surface for middle and downstream of the East River mainstream, which providing the basis for flood control and disaster reduction, channel improvement, human activity control to the East River.