中文摘要：

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.

英文摘要：

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.