摘要
本文依据一种变截面河口中潮波传播的解析模式,导出了潮能的计算公式,讨论了潮能的劈分与传输。作为实际例子,利用所得之结果估算了杭州湾四个主要分潮波的能量。其结论是:单位自由表面以下水柱的平均势能和平均动能随着从湾口向里的距离的增加而增加,但前者较后者增加得快;半日潮波平均动能与平均势能之比约为二分之一,而全日潮波的相应比值仅约为十分之一;由湾口输入的总潮能约为3.58×10~6kW,而从澉浦附近断面流出的总能量约为0.49×10~6kW,于湾内耗散的总潮能为湾口输入的86%。
Based on an analytical model of tidal wave propagation in varying cross-section estuaries, the formulas for calculating tidal energy are derived and the partition and transport of tidal energy are discussed. The results obtained are used for estimating the tidal energies of four principal constituent waves in the Hangzhou Bay. It is concluded that in the water column under the unit area of free surface, both average potential energy and average kinetic energy increase with the distance of tidal wave propagation, but the former increases faster than the latter; for semi-diurnal constituent waves the ratio of the average kinetic energy to the average potential energy is about 0.5, the corresponding ratio of diurnal constituent waves is only 0.1; the total tidal energy inputted from the mouth cross-section is 3.58×106 kW, the total tidal energy outputted through the cross-section near the Ganpu is 0.49×106 kW; the dissipation in the-bay is about 86% of the total energy inputted through the mouth.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1989年第4期322-329,共8页
Oceanologia Et Limnologia Sinica
基金
中国科学院科学基金
