ANALYSIS OF SUBMARINE CABLE STABILITY IN EAST ACEH WATERS CAUSED BY CURRENT VELOCITY

• Main Author: Dera Nur Hermawan, Delza
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/39927
• Institution: Institut Teknologi Bandung

Indonesian waters can be used as a place to install submarine cables. However, submarine cabling cannot be done arbitrarily, a review of several factors is needed. One factor that needs to be reviewed is the current velocity. Flow can cause the cables to move. If the movement of the cables reaches conditions that are too extreme, the cable will move from the specified place and cables might be damaged. Therefore, this research will be focused on the analysis of the stability of submarine cables in East Aceh waters with a factor that is considered is only the current velocity. East Aceh waters have multiple daily tidal types. The dominant current in these waters is tidal currents with the direction of the current heading southeast at high tide and heading northwest at low tide. Stability analysis of submarine cables in East Aceh waters is done by calculating the lateral direction and vertical direction. In calculating lateral stability, the current velocity is required. The current velocity used in the calculation is the maximum current velocity that has been averaged over depth. The maximum current velocity was chosen because it was considered to have the greatest impact on cable stability and averaging the depth chosen because this study used the Delft3D-Flow 2-dimensional model so that the value of the current velocity in one water column was considered to be the same. The simulation was conducted for 12 months, from December 2013 to November 2014 with a time period of 60 minutes. The forces that are used are tides and wind. Verification of the model results elevation on the observation data is quite good, indicated by the relatively low RMSE value of 0,119 meters for Sabang Station, 0,108 meters for Malahayati Station and 0,107 meters for Lhokseumawe Station. Meanwhile, the verification of current velocity of u direction v direction on the observation data is also quite good, indicated by the RMSE value of 0,027 m / s for u direction current velocity and 0,0038 m / s for v direction current velocity. Verification results are quite good that the data model can be used to calculate the cable stability. Based on the calculation of the stability of the submarine cable at 77 (seventy-seven) observation points on the cable track in simulation time, the condition of the cable relatively stable in vertical and lateral directions with the percentage of lateral direction stability ranging from 70-98%.