Application of Stage-Fall-Discharge Rating Curves to aReservoir Based on Acoustic Doppler Velocity MeterMeasurement Data |
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학술지명 Water
저자 김연수,변지선,안현욱,오성렬,이승수
발표일 2021-09-05
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The applicability of the stage-fall-discharge (SFD) method in combination with acousticDoppler velocity meter (ADVM) data, upstream of a hydraulic structure, specifically, the Sejong-weirlocated in the Geum River, Korea, was examined. We developed three rating curves: a conventionalsimple rating curve with the data measured using an acoustic Doppler current profiler (ADCP) andfloating objects, an SFD rating curve with the data measured using the ADCP and floating objects,and an SFD rating curve with the data measured using an ADVM. Because of the gate operation effect,every rating curve involved many uncertainties under 1000 m3/s (3.13 m2/s, specific discharge). Interms of the hydrograph reconstruction, compared with the conventional simple rating curve, theSFD developed using ADVM data exhibited a higher agreement with the measured data in terms ofthe pattern. Furthermore, the measured discharge over 1000 m3/s primarily ranged between 97.5%and 2.5% in the graph comparing the ratio of the median and observed discharge. Based on thisexperiment, it is confirmed that the SFD rating curve with data to represent the backwater effect,such as ADVM data, can reduce the uncertainties induced by the typical rating curve |