子牙新河尾闾段河流特性分析

利用实测水文、泥沙资料 ,对子牙新河尾闾段的河道阻力、冲淤特性、河口水沙及潮汐运动规律进行了全面分析。认识到近年来上游径流减少、河槽萎缩、滩地严重阻水、近海泥沙大量回淤河口及挡潮闸下引河 ,这是目前海河流域入海河流尾闾段普遍存在、影响防洪安全的重要问题。作者对子牙新河尾闾段行洪能力、滩地糙率及引河段淤积态势进行了分析研究 ,提出了利用潮汐动力与工程措施相结合的方法改善尾闾段河道淤积状态 ,提高河口排洪能力。

Study on the River Characteristics for Estuary Reach of the Floodway of Ziya River

Basod on the field hydrologic and sediment data, the river resistance,scouring and silting behavior,flow\|sediment and tidal movment law in the estuary reach of floodway of the Ziya River has been comprehensively analyzed.Such as runoff amount declining,river channel shrinking,obstructing flood\|plain in flood discharging and tidal dynamic,these caused a large quantities of sediment back\|deposition in the river estuary reach and in front of the tidal barrier.It is a commonly important problem affecting flood control safety in those muddy estuaries on the shore of Bohai Bay. Author of this paper analyzed and studied flood carrying capacity of estuary reach,roughness of flood\|plain and depositing trend in the river channel.And a way has been presented to improve depositional state in estuary reach and increase flood carrying capacity of the river channel.