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在冲淤变化很频繁的河流上,水位流量关系是不稳定的。一般的说其原因有三:和一是断面的变化;第二是流速的变化(如受回水影响);第三是水位和流量测验的误差。现在专就由河床变化而引志二水位流量不稳定的分析方法作如下的讨论。
Changes in the erosion and deposition of the river is frequent, the relationship between the water level is not stable. Generally speaking, there are three reasons for this: one is the change in section; the other is the change in flow rate (as affected by backwater); and the third is the error in water level and flow rate tests. Now specifically on the changes in the riverbed Chi two water level instability analysis method for the following discussion.