一、问题的提出渠道某段水的利用系数η,这里是指渠道该段通过的流量与渠道首端流量之比值,因而它能反应渠道渗漏量的大小,质量好坏,这是考查水电规划和建设中经济效益不可缺少的一个重要参数。正确选定、计算这一系数十分重要。直到目前,我县都是引用外地或书刊介绍的数据,也无实测资料,所以,通过一定的测量办法,并建立相应的理论计算公式,尤为必要。 First, the problem put forward a channel coefficient of utilization of water η, this refers to the passage of the passage of the channel flow and the ratio of the first flow of the channel, so it can reflect the size of the channel leakage, the quality is good or bad, which is to examine the hydropower Planning and construction of an indispensable economic benefits an important parameter. Correct choice, calculate this coefficient is very important. Up till now, my county has quoted the data that the outside world or the book introduces, also have no measured data, so, through some measurement methods, and establish the corresponding theoretical formula, it is especially necessary.