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Fitri Riandini

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Author-ID : 2642090

Civil Engineering, Building, Construction & Architecture Engineering

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Penerpan Regional Environmental Simulator (RES) Untuk Simulasi Dinamika Muara Perairan Semarang Fitri Riandini
JURNAL SUMBER DAYA AIR Vol 6, No 2 (2010)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Estuaries are multi-functional environments. Their eco-system is of great importance for wildlife; wetlands are often found, serving as a nursery for fish and birds. At the same time, human activity in estuaries is high, often stressing the ecological function of these environments. Because estuaries (where a river enters the sea) are conveniently situated for trade, estuarine environments have nearly always been densely populated areas. Availability of fresh water for cooling water or washing equipment makes high possibility of wasting waters. One of parameter which is harmful for water environment is sediment in huge contains. Some problems will appear, such as high turbidity which is blocking sun shine, sedimentation, or closing river mouth.Semarang is capital city of Central Java Province, located at northern part of this province. As a coastal city a lot of rivers ended at Semarang coastal water and transport the sediment. One of effect of sediment transport is sedimentation and further morphological change.In this study a 3-dimensional hydrodynamics and sediment transport model (ECOMSED) as a part of system called Regional Environmental Simulator (RES) have applied to simulate estuary dynamic of Semarang coastal waters, especially around Kali Garang. The model can be used to predict environment condition and disaster prevention. Simulation results shown that circulation of Semarang coastal water dominated by river discharge rather than sea tide, and transport the sediment from river to the coast.

PENERAPAN SKEMA WETTING AND DRYING PADA PERSAMAAN HIDRODINAMIKA UNTUK SIMULASI RAYAPAN GELOMBANG Fitri Riandini
JURNAL SUMBER DAYA AIR Vol 5, No 2 (2009)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Wetting and drying (WAD) are common and important phenomena of the coastal ocean. They occur inlow-lying coastal zones and also in embayment and inlets. Strong winds and/or tides can cause flooding andsubsequent drying. In shallow water models, wetting and drying are determined by the total depth D = 0 for'dry' and D>0 for 'wet'. The scheme defines 'dry' cells as region with a thin film fluid. The primitiveequations are solved in the thin film as well as in other regular wet cells. The scheme was applied tohydrodynamics model to simulate tsunami's run up at Banda Aceh (Nanggroe Aceh Darussalam) andPangandaran (West Java). Simulation results show that run up height at Banda Aceh reach more than 5 m,while at Pangandaran more than 3 m.

Pemodelan Dua Dimensi Hidrodinamika Untuk Mengestimasi Potensi Energi Arus Laut Di Selat Sunda, Selat Bali Dan Selat Sape Juventus Welly; Fitri Riandini; Teti Kurniati
JURNAL SUMBER DAYA AIR Vol 8, No 1 (2012)
Publisher : Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Research to estimate the potential energy generated by ocean currents was done by using two-dimensional hydrodynamic models. The breadth of the waters of Indonesia provides the advantage to tap the potential energy generated by tides, waves and ocean currents. In narrowed straits, bays or other places ocean currents can be very strong and potential for energy utilization. Studies were conducted on the potential of ocean currents in the Sunda, Bali and Sape (East Nusa Tenggara) Straits. Flow velocity potential is used to calculate the percentage of incident flow velocity greater than 1 m/ s. The simulation results indicated that maximum flow velocity occurred at full moon with a condition from ebb to tide and low tide to tide. locations showing a large enough percentage are the Sunda Strait east of Panjurit Island, Bali Strait west of Tanjung Batulicin, and Sape Strait between the islands Matagateh and Sapekah. For each location, the percentage of maximum current events during one year ranged from 40% to 70%.

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