Application of Large Sample Data Analysis Method to Flow  Calculation of Medium and Small Rivers

CAO Hao; WANG Cheng-gang; LI Ji-tao

doi:10.11988/ckyyb.20190303

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Journal of Changjiang River Scientific Research Institute ›› 2019, Vol. 36 ›› Issue (11) : 40-44. DOI: 10.11988/ckyyb.20190303

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Application of Large Sample Data Analysis Method to Flow Calculation of Medium and Small Rivers

CAO Hao¹, WANG Cheng-gang², LI Ji-tao³

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Abstract

Traditional flow measurement methods (e.g. flow meter method, buoy flow measurement method, index flow rate method, specific drop area method, etc.) for most small and medium-sized rivers at present are featured with large investment and large time consumption. In association with traditional sectional flow calculation theory and the latest surface velocity measurement technology, we propose a method of determining the stage-discharge relation of river section via inputting large sample data of surface velocity and sectional water level. This method needs only a small amount of observed flow data at medium and high water levels to calculate flow rate and fit the stage-discharge curve. Compared with traditional methods, the proposed method reduces the workload of flow rate measurement required for fitting the stage-discharge curve, and cuts down the errors brought about by measurement, hence enhancing precision. It is also convenient for operation with low cost.

Key words

large sample data model / small and medium-sized rivers / flow measurement / water level / stage-discharge relation curve

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CAO Hao, WANG Cheng-gang, LI Ji-tao. Application of Large Sample Data Analysis Method to Flow Calculation of Medium and Small Rivers[J]. Journal of Changjiang River Scientific Research Institute. 2019, 36(11): 40-44 https://doi.org/10.11988/ckyyb.20190303

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