Poisson 방정식을 이용한 유속분포법의 등속선 작성 및 적용

초록

Recently in Korea, automatic discharge measurement system which calculates the river discharge using velocity measured byUVM(Ultrasonic Velocity Meter) and ADVM(Acoustic Doppler Velocity Meter) is actively being introduced. There are IVM(IndexVelocity Method) and VPM(Velocity Profile Method) in the method of calculating river discharge. IVM is the method of calculatingmean velocity of the entire cross-section by establishing the relationship between index velocity and mean velocity and VPM is themethod of calculating velocity distribution of the entire cross-section by establishing the relationship between index velocity andvelocity distribution. Chiu(1988)'s 2-D velocity distribution using VPM, it is necessary to adjust a lot of shape parameter and it is difficultto obtain the exact isovel distribution except for the rectangular flow cross-section. In this study, we proposed the VPM by a theoreticalreview of the Poisson equation in order to improve the disadvantages of Chiu's method and verified the applicability byutilizing the velocity data of the automatic discharge measurement system, Wuman, Hangangdaegyo in the Han river and Daecheon inthe Mangyung river.

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