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Satria Damarnegara
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Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Journal : Journal of Civil Engineering

 1 
Urban Drainage System Simulation Using 1D Model, Case Study: North Kembangan Drainage System, Jakarta Rayhan Airlangga Wijanarko Putra; Satria Damarnegara; Yang R. Savitri
Journal of Civil Engineering Vol. 39 No. 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.7301

Abstract

Jakarta has a high level of urbanization, which causes land use changes and increasing inundation problems. One area that has experienced inundation is North Kembangan with a height of 20 - 30 cm in recent years and so of that the location is included in flood-prone sub-districts. Accordingly, a study is needed to estimate the North Kembangan drainage system actual conditions using the rainfall-runoff transformation model. This study simulates using the Storm Water Management Model (SWMM), and the calibration validation process is accomplished using the Nash-Sutcliffe model efficiency coefficient (NSE) and root mean square error (RMSE) method to evaluate the reliability of the model. The calibration for several model parameters is required to obtain the reliability model, including the channel Manning coefficient, land overflow Manning coefficient, and curve number. The calibration result shows that NSE values are 0,65, and the RMSE is 0,051 based on data in 2021. Then the validation result shows the NSE is 0,62 and RMSE is 0,040 based on data in 2022.
WAVE NUMERICAL MODEL OF SWELL AND SEA AT ROTE STRAIT Satria Damarnegara; Fuddoly Fuddoly; Dyah I Widyastuti
Journal of Civil Engineering Vol. 35 No. 2 (2020)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i2.7414

Abstract

A spectral wave numerical simulation based on SWAN is used to model 10 years wave climate at Rote Strait, NusaTenggara Timur province. ERA5 reanalysis data of total wave and wind is used for model forcing. Simulation results showwaves direction in Rote strait are coming from southeast and southwest. Waves direction at nearshore of southeast Timor islandcoast are coming from southeast because of refraction and diffraction. Waves height over 0.8 m occurs in 320 days in one year.50 years wave return period calculated at 2.68 m height. Indeed, port development in Rote strait area need to consider the downtime caused by waves and extreme wave forces in the design.
TRANSCRITICAL FLOW SIMULATION USING SHALLOW WATER EQUATION MODEL Satria Damarnegara; Rheszha Pahlavi Ali; Mohamad Bagus Ansori
Journal of Civil Engineering Vol. 34 No. 2 (2019)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v34i2.7437

Abstract

This paper shows the capabilities of DELFT3D-FLOW shallow water equation solver on transcritical flow. Two gridconfigurations are tested using a shock capturing numerical schemes that available on the solver. The simulation shows a goodagreement with the analytical solution and proper grid resolution is needed to obtain a stable result. Implemented a shockcapturing schemes is found to be critical to obtain a stable result. The model then used to simulate a real scale spillway chutechannel of Logung Dam in Kudus-Central Java. The model could properly simulate the hydraulic jump, calculate the Froudenumber and stilling basin performance.
Evaluation of Discharge Calculation in Open Pit Mining Ivan Kurniawan; Satria Damarnegara; Nastasia Festy Margini
Journal of Civil Engineering Vol. 38 No. 3 (2023)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v38i03.7462

Abstract

This study presents the discharge calculation of open pit mining drainage system in open pit mine at PT Maruwai Coal, in Central Kalimantan. Several calculation methods are compared, including FJ Mock, HEC-HMS, and 2D HEC-RAS simulation. The open pit mine drainage system consists of sump storage with volume of 12.574 m3 and discharged using 0,22 m3/s pump. The loss method for HEC-HMS and HEC-RAS is modelled using Curve Number (CN) approach. CN value choice need to consider steep slope condition at the site. Storage elevation and pump operation at 10 rainfall event is observed and used as model validation. The calculation shows each method is capable to model the event reasonably well. The average run-off coefficient varies from 0.72 for FJ Mock and 0.63 for HEC HMS. However, FJ Mock method gives daily average value and may underestimate the run-off discharge. Indeed, HEC-HMS and HEC-RAS model is more suitable for flood modelling because of unsteady nature of the flow.
Co-Authors Dyah I Widyastuti Fuddoly Fuddoly Ivan Kurniawan Mohamad Bagus Ansori Nastasia Festy Margini Rayhan Airlangga Wijanarko Putra Rheszha Pahlavi Ali Yang R. Savitri