一、前言在有支流的河段,研究支流来水对干流水位的影响,或者是支流水庫修建后,降低干流水位的效果問題,在目前規划中小河流的流域規划时所进行的水文計算中,是会常常遇到的,下面介紹兩个粗略的方法,供讀者参考,并希望指教。長江中游某段,有小支流来汇(如图1)。干流有上下兩站,支流有最下游控制站,他們都有水位流 I. Introduction In the tributaries of the river, the study of tributary water on the mainstream of the water level, or the construction of tributaries to reduce the effect of mainstream water level problems in the current planning of small river basin planning carried out hydrological calculations, Is often encountered, the following describes two rough methods for readers reference, and hope that advice. A section of the middle reaches of the Yangtze River, a small tributary to exchange (Figure 1). The main stream has two stations up and down, the tributaries have the most downstream control station, they all have water flow