泥沙运动的规律性,可以根据运动的形式,分作三个规律:(1)水是静止的,泥沙由于本身的重量,向下沉降的速度的规律,叫作「沉速规律」;(2)静止的泥沙,受了周围水流运动的影响,从静止的状态,转变为运动状态的临界流速规律,叫作「开动流速规律」。(3)水是运动的,沙也是运动的;某一定型水流,对于某一定型泥沙,能够挟运多少 The regularity of sediment movement can be divided into three rules according to the form of movement: (1) The law of the speed at which sediment is still and sediment is subsided due to its own weight is called “the law of heave.” (2) Quiescent sediment, influenced by the surrounding water flow movement, changes from a quiescent state to a critical flow rate law of motion state, which is called “the law of starting flow rate”. (3) water is sport, sand is also a sport; a certain type of water flow, for a certain type of sediment, how many hostage