中文摘要：

通过对近20a实测水文地形资料的深入分析。得到了灌河干流河道及出口水道的冲淤演变规律：干流河道在盐东控制闸建闸前，以响水为界上段冲刷下段淤积，建闸后，从多年平均来看上段明正淤积下控冲刷；近10a来．陈家港以下的干流河道弯道凹岸处均为深槽逼岸的冲刷区，且处在持续稳定冲刷状态；自20世纪80年代以来，灌河口外岸滩冲刷强度减弱．近10a来。河口外冲淤近于平衡状态。这些研究为灌河口码头、航道等工程建设提供科学依据。

英文摘要：

In this paper, the scour and silting evolution regularities of the Guanhe River main channel and outlet channel are obained by analyzing the observed hydrographic and topographic data in recent 20 years. It is shown from the analysis results that with Xiangshui taken as demarcation point, the upper reach of main channel was eroded and the lower reach was silted before the Yandong water control gate was completed; but the upper reach was silted and the lower reach was eroded after the water control gate was completed. In recent 10 years, the concave bank of main river chnnel downstream of the Chenjia Port was deeply scoured, and kept in a steady scour state. The erosional strength on the river shoal off the Guanhe River estuary has decreased since 1980s, and the river estuary has nearly been in regime in recent 10 years. These study results provide scientific basis for constructing the port and navigation channel engineerings in the Guanhe River estuary area.