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11.问:什么是落差?什么叫水头?答:谁都知道“水往低处流”的道理,这就是说流水的上下游任意两点之间的水(或称水位,也可叫作水位高程)有差别,此差数即叫河水在那两点之间的落差(或水头),落差是以米作单位来计数的。此外还常说水库的水头,水电站的水头,水闸的水头,渠道跌水的落差,这是指这些水工建筑物上游和下游水面的差数。人们常问落差要多大才能发电呢?现在从各地的经验来看,凡有流水都可以发电,有很多旧式水碓(或水磨)其上下游水位只有0.2—0.3米,现在经过少许
Q: What is the drop? What is the head? A: Everyone knows the “flow of water to the lower” truth, which means that water upstream and downstream of any two points between the water (or water level, also known as Water level elevation) is different, this difference is called the river between the two points of the gap (or head), the drop is measured in meters. In addition, the head of the reservoir, the head of the hydropower station, the head of the sluice and the drop of water in the channel are often mentioned. This refers to the difference between the water level upstream and downstream of these hydraulic structures. People often ask how big a drop can generate electricity? Now from all over the experience, where there is water can generate electricity, there are many old water 碓 (or water mill) on its upstream and downstream water level of only 0.2-0.3 meters, now after a little