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进水渠（）

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2021-12-25 14:05

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往往溢流堰不能紧靠水库，需修建进水渠将水库中的水平顺引至堰前。①要求：应将水平顺引至堰前，在引水过程中，尽量减小水头损失，即在合理的开挖条件下，减小水流流速。②平面布置：长度尽量短，轴线尽量平直，最好为直轴线，如需转弯，R>5B（渠底宽），且堰前有足够长的直线段，保证正向进水。堰前进口为喇叭形。③横断面：应足够大，以减小流速，减小水头损失，一般流速为1～2m/s。④断面形状为梯形，应注意边坡稳定。做好衬砌，减小糙率。⑤纵断面：底坡采用逆坡或平坡，渠底高程要低于堰顶高程

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标签：养鱼水质水产学

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