栏栅式山溪取水工程取水特性的试验研究

通过水工模型试验，对栏栅式山溪取水工程的取水特性进行了研究，探讨了在有足够大的集水廊道的前提下，该取水工程的潜在取水能力。结果表明，在影响栏栅取水量的诸因素中，栅条长度、栅隙和栏栅的设置角度对取水量的影响程度不同；其取水量主要由栏栅的设置角度决定，而栅条长度和栅隙对取水量的影响程度较小；栏栅的设置角度小于50°时，栏栅有较大的引水比，栏栅的设置角度大于50°后，栏栅的引水比大幅度下降。

Experimental studies on water intake characteristics of bar-screen type mountain stream diversion works

Water intake characteristics of bar-screen type mountain stream diversion works are experimentally investigated by means of hydraulic model test. On the premise of ensuring a large enough cross section of the collecting ditch, its potential capacity of water intake is explored. The results show that the influencing degree of the length, the clearance and the setting angle of a bar-screen on its intake discharge is different among the various factors which influence the intake discharge of bar-screens. The intake discharge mainly depends on the setting angle of a bar-screen, and is affected less by the length and the clearance of a barscreen ; when the setting angle of a bar-screen is smaller than 50 degrees, the bar-screen keeps a high water intake rate, but the water intake rate decreases largely when the setting angle of a bar-screen is bigger than 50 degrees.