水力资源自然界的水体，因受重力的作用，便具有作功的能力．地表上的水沿着坡面自高处流向低处或渗人地下，然后汇集到河槽中形成河流。河流中不断有水自高处何低处流动着，水体从高处移动到低处，就做了功，这就是河流的水力资源．在很久以前，人类已经懂得利用水的能量... Water resources Natural water bodies, because of the role of gravity, have the ability to work. Water on the surface along the slope from high to low flow or infiltration underground, and then converged into the river to form a river. The continuous flow of water in the river from the height of the lower part of the flow of water from high to low, to do the work, which is the river’s hydraulic resources. In a long time ago, mankind already knew how to utilize the energy of water ...