The Estimation of Total Sediments Load in River Tributary for Sustainable Resources Management

Abstract

One problem that disrupts the stability of the river is sedimentation. The impact caused by excessive sedimentation can cause an increase in riverbed elevation (siltation) and at the same time can cause an increase in water level so that it can increase losses when flooding occurs. For the purpose of sustainable water resource management, especially for river ecosystems, it is very important to be able to estimate the total amount of sediment loads a little more accurately according to the river's carrying capacity. This study aims to evaluate the method of estimating sediment transport that is gives the best level of accuracy of existing sediment transport methods. The method is considered accurate if the percentage of compliance with the highest discrepancy ratio (r) ranges from the available data. This research methodology analyzes and compares several methods of estimating the total sediment load that are most suitable for the Cimanuk River tributary data. Sediment parameter data inventory is done by taking water samples to estimate the concentration of suspended sediment, bed load sediment samples and samples of the bed load material using the correct strander data retrieval. In addition, measurement of river hydraulic parameters is needed, including flow velocity and river water temperature. Based on the analysis, the method that works best to calculate the sediment transport values in sequence are the Van Rijn method, the Yang method, the Bagnold method, the Engelund-Hunsen method, the Karim-Kennedy method and the Toffaletti method which is close to 30% fulfilling the discrepancy ratio (r) (0.5 ≤ r ≤ 2.0).