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| Design technology of middle and small check dam for farmland forming with culvert-like spillway |
| Pan Jianping, Qiao Jun |
| Weiyuan Bureau of Soil and Water Conservation, 748200, Weiyuan, Gansu, China |
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Abstract To guarantee normal production, spending flood safely and sustainable use, check dam for farmland forming, it is necessary to build outlet works. Culvert and horizontal pipes and spillway with hatch control need management of person specially assigned when flood is discharged. Spillway with non-gate control can stand large quantity of flood, but need many funds, therefore not economical because of big size of section. In order to overcome disadvantages mention above, fixed culvert is designed instead of gate of spillway with hatch control. This can not only control flood discharge amount and protect farmland and road in the lower reaches, but also reach the purpose of making section size smaller and saving funds. According to largest quantity of free discharge and order of designing peak flow quantity in the flood discharge, flood regulation routing formula of general graph is computed.
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Received: 02 August 2004
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