浙江省几条河口的动力与水力几何形态关系的研究  

Study on the relationships between hydrodynamics and morphology for macro-tidal estuaries in Zhejiang Province

作　　者：韩曾萃[1] 唐子文[1] 曹颖[1] 邢云 

机构地区：[1]浙江省水利河口研究院,浙江杭州310020 [2]浙江省钱塘江管理局,浙江杭州310020

出　　处：《泥沙研究》2014年第6期44-50,共7页Journal of Sediment Research

基　　金：国家自然科学基金--青年科学基金项目(41306082);国家自然科学基金项目(51379190);浙江省自然科学基金项目(LY12E09010)

摘　　要：提出了强潮及强涌潮河口断面特征、纵向河床形态与水动力之间的经验关系式,即半潮水位下断面面积、河宽、水深及纵向河宽放宽率、面积放大率、河床纵比降与上下游来水、来沙动力条件的关系式。并用浙江省四条河口的实测水文地形资料对河床形态中的各项参数进行了验证,结果表明平均误差小于10%,80%的点据误差小于20%。对面积的经验关系式转换后的关系式表明许多平衡状态下的河口断面面积即是临界起动流速作用下的稳定断面。Relationships between hydrodynamics and morphology for the macro-tide and tide-bore estuary are es- tablished in this paper. At half-tidal level, the cross-section of area, width, depth, the ratio of width and depth and the enlargement ratio of width, the enlargement ratio of area, the river bed longitudinal slope etc. are deter- mined by hydrodynamic conditions, namely runoff discharge, sediment concentration from upstream and tidal discharge, sediment concentration from downstream. Those regime formulas have been verified by four estuaries in Zhejiang Province. The average error is less than 10% , and the maximum error is 20% -30%. The cross- sectional area at half-tidal level is to keep the state at critical incipient velocity. Finally, some principles for ap- plication to predict the changes of human active on the estuary are also provided in this paper.

关 键 词：强涌潮河口 河相关系 宽深比 放宽率 河床纵比降 

分 类 号：TV148[水利工程—水力学及河流动力学]