A STUDY OF CURRENT VELOCITY HORIZONTAL PROFILE AT BERAU RIVER DUE TO TIDAL EFFECT USING PARABOLIC METHOD

• Main Author: Hashuro Maulalmulki, Harish
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/47139
• Institution: Institut Teknologi Bandung

Study of current velocity profiles is still very rarely done, especially for horizontal profiles. Based on theory, the current velocity in the middle flow will be faster than the current near the river bank due to friction, so the current velocity horizontal profile will form a parabolic curve. The purpose of this study is to see the compatibility percentage between theory and the actual situation using current measurement at Berau River. Basic parabolic equations is used to estimate the horizontal profile curve of the river flow velocity analytically as called parabolic method. The location is still affected by tides, so the horizontal profile is studied by looking at tidal dynamics that occur. The results showed that the river current velocity moved downstream-upstream due to the effect of tidal currents, with the downstream current velocity faster and with a longer period of time due to the flow of rivers. The quality of horizontal profile approach using basic parabolic equation is determined by the excellent value of compatibility, the correlation coefficient (R), and the length of horizontal profile that could be approached by the equation (h). The results showed the average compatibility value up to 89%, which is 91% at low tide and 87% at high tide. The compatibility showed better values at high tide than at low tide and in the full moon than in half moon due to a large earth-moon attractive force on the horizontal profile.