Abstract
This paper addresses the estimation method of discharge for tidal river. Water level in the tidal river is greatly changed in response to the influence of a tide. Thus, the river flow near estuary is characterized by a density current. Consequently, the existing H-Q rating curve gives a large error to estimate the discharge. In this research, time-series of discharge has been observed by using the Acoustic Doppler Current Profiler (ADCP) to improve the discharge estimation. We proposed the new estimation method of discharge based on the analysis of measured flow velocity and water level variation, instead of the H-Q rating curve method.
