提高黄河下游河道输沙能力的途径探讨  

Search After the Way to Increase Sediment Transport Capacity in the Lower Yellow River

作　　者：何国桢 杜殿勖 曲少军[2] 

机构地区：[1]珠江水利科学研究院,广东广州510610 [2]黄河水利科学研究院,河南郑州450003

出　　处：《人民黄河》2015年第6期25-28,共4页Yellow River

基　　金："十二五"国家科技支撑计划项目(2012BAB02B02)

摘　　要：阐述了水流功率原理与输沙机理并导出其公式，结合黄河多沙的特点，认为：①以临界水流功率对应的临界流量与来沙系数临界值来协调水沙关系，可提高黄河下游河道输沙能力并多输沙入海；②在现状河道边界条件下，选择利津断面流量为2 200~3 200 m3/s作为临界水流功率对应的临界流量较为合适，判断下游河道冲淤基本平衡的临界值则取场次洪水来沙系数为0.018 kg·s/m6；③为增大下游河道输沙的水流功率，水库排沙期应尽量使利津站与花园口站平均流量之比大于0.85，并相机利用东平湖向黄河补水。This paper explained the principle of stream power and its mechanics of the sediment transportation, and thus the stream power formula had been derived. The results show that： a） according to the characteristic of a great amount of sediment in the Yellow River, the critical stream power and the threshold of sediment discharge ratio, as the two main criterions of the scouring and silting in the river bed; b） The extent of the discharge related the critical stream power are 2 200 -3 200 m^3/s and the threshold of sediment discharge ratio is about 0. 018 kg · s/m^6 ; c） The discharge ratio between Lijin section and Huayuankou section is more than 0.85 in the period of flood, and water released from Dongping Lake.

关 键 词：流量比 临界来沙系数 临界水流功率 输沙能力 黄河下游 

分 类 号：P333[天文地球—水文科学] TV882.1[水利工程—水文学及水资源]