Rainwater design discharge calculation method in constant and non-uniform flow condition
A technology for designing flow and non-uniform flow, which is applied in computing, special data processing applications, instruments, etc., to achieve the effects of improving applicability, clear concept, and great social and economic benefits
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[0013] The method of the present invention will be further described below with specific examples, but the present invention is not limited to the following examples.
[0014] The known conditions for designing a drainage pipe in a certain area: the rainwater collection area at the upstream entrance of the drainage pipe is F=22.88ha, the length of the pipe section dL=300m, the roughness coefficient of the reinforced concrete drainage pipe is n=0.014, and the comprehensive runoff coefficient of the rainwater collection area ψ=0.709, coefficient A=1327.817, constant b=3.105, exponent m=0.295 of design rainstorm intensity q, design pipe bottom slope j is selected according to the minimum value allowed by the code according to pipe diameter D, drainage pipe cross-sectional area W=0.7854 D. 2 , hydraulic radius R=0.25D, design water level Z at the downstream end of the pipe section 下 =3.40m, the highest water level Z allowed at the upstream end 上允许 =3.45m, the ground water collec...
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