一、基本情况潮水河流的流速变化是和潮汐现象的涨落变化互相一致的。我国沿海的河道大都属于半日周期潮汐,每个潮日一般都出现两次高潮和两次低潮,即出现两个潮期。每个潮期的历时长短不一,潮流在大致相同的时间内一般相应出现两次涨潮流 First, the basic situation The tidal river flow rate changes and tidal changes in the phenomenon of mutual change. Most of the coastal rivers in our country belong to the half-period tidal cycle. There are two orgasms and two ebb tides on each tide day, which means that there are two tides. The duration of each tide period varies, the tide at roughly the same time generally corresponding to two rising tide flow