Reclamation plan in Jakarta Bay close to the power plant cooling water discharge location. It will affect hot water distribution system and possibly increase water temperature around the power plant intake location. The increase in water temperature at the intake location will disrupt the operation of the power plant. The impact of hot water discharge to the intake location can be reduced by extending the intake channel and building barrier walls as planned by the Muara Karang Power Plant. Modeling is done with 3 scenarios, namely the existing condition, the existence of the reclamation island, and the proposed infrastructure around the power. This modeling aims to determine the effect of the reclamation island on heat distribution, especially around the intake location and the effectiveness of the infrastructures in minimizing the problem. Simulation for the east and west monsoons is done in 3 dimensions with MIKE3 Flow Model FM (DHI) by applying temperature function. Overall, the presence of reclamation island will increase the average temperature at the intake by 0.32 to 0.7°C compared to the existing conditions, and the proposed infrastructure is quite effective to reduce the temperature at the intake by 0.5 to 0.8°C.
Tsunami modelling of potential landslide-induced tsunami in Makassar Strait is carried out to quantify possible damage to the nearby cities. Two numerical models are used to represent the wave generation and propagation by using NHWAVE and FUNWAVE models, respectively. The simulations consist of a series of scenarios based on distinct size of the landslide volume. Four landslides with volume 5, 8, 70, and 200 km 3 are used as tsunami sources in the initiation stage. The sources are evenly distributed in the Strait addressing different landslide location. Maximum wave heights of 1.5 m are found in the area between Palu and Bangkir from case 1 and around Talok from case 2 simulations. The empirical run-up calculation of 7.5 m is estimated at the land for the presented wave height. The value significantly elevates the case 3 and 4 proportional to the volume values. The waves impact more than half of coastline with maximum value found in the Sulawesi side. Interestingly, wide and narrow shelf next to Kalimantan Island plays an important role in reducing the tsunami hazard level.
AbstrakPesisir Teluk Semarang saat ini mengalami perkembangan yang sangat pesat karena merupakan pusat pertumbuhan ekonomi utama di Jawa Tengah. Di sisi lain, saat ini pula pesisir Teluk Semarang mengalami berbagai permasalahan yang sangat kompleks, seperti banjir rob, penurunan muka tanah (land subsidence), serta kerusakan pantai akibat abrasi dan sedimentasi. Sesuai dengan tugas pokok, fungsi dan kompetensi BPDP serta salah satu peran BPPT, yaitu pengkajian dan solusi di bidang teknologi, maka Balai Pengkajian Dinamika Pantai -BPPT melakukan kajian untuk menghasilkan konsep pola spasial konektivitas dan infrastruktur penanganan permasalahan Teluk Semarang serta pemodelan numerik untuk mengetahui perubahan pola hidrodinamika pantai dan lingkungan di Teluk Semarang, yang meliputi pemodelan hidrodinamika, pemodelan kualitas perairan dan pemodelan transport sedimen.
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