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对山区河流折角急弯段的基本特征进行了研究．根据能量和动量守恒原理，导出了计算上游水位壅高和下游回流区最大宽度的理论关系式，并用室内实验结果进行了验证．研究表明，水位壅高和最大回流宽度取决于弗罗德数和折弯角．还提出了计算水位壅高和最大回流宽度的显式关系式．
The basic characteristics of the sharp bend of mountain river are studied. According to the principle of conservation of energy and momentum, the theoretical formula for calculating the height of upstream water level and the maximum width of downstream recirculation zone was derived and verified by laboratory experiments. Studies have shown that the water level 壅 high and maximum return width depends on the number of Frods and bending angle. An explicit formula for calculating the height of water level and the maximum recirculation width has also been proposed.