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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Jurnal Teknik ITS IPTEK Journal of Proceedings Series IJOCE (International Journal of Offshore and Coastal Engineering) Wave: Jurnal Ilmiah Teknologi Maritim Sewagati WAVE: Jurnal Ilmiah Teknologi Maritim
Shade Rahmawati
Departemen Teknik Kelautan Institut Teknologi Sepuluh Nopember Surabaya
Arts Humanities Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Energy Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences Transportation Other

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PEMODELAN TINGGI GELOMBANG UNTUK KAJIAN ENERGI GELOMBANG LAUT DI PERAIRAN BARAT PROVINSI LAMPUNG Ismail Ali Hajar Aswad Ali; Haryo Dwito Armono; Shade Rahmawati; Asfarur Ridlwan; Rizki Mendung Ariefianto
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 15 No. 2 (2021)
Publisher : National Research and Innovation Agency (BRIN Publishing)

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Abstract

Perairan barat Provinsi Lampung merupakan salah satu lokasi yang diperkirakan memiliki potensi energi gelombang yang cukup besar. Namun, minimnya informasi tentang titik potensial energi gelombang laut yang lebih rinci membuat kawasan ini belum dapat dieksplorasi dengan baik. Penelitian ini bertujuan untuk mendapatkan tinggi gelombang signifikan (Hs) yang merupakan salah satu variabel utama dalam menentukan energi gelombang laut di perairan barat Provinsi Lampung. Studi ini dilakukan melalui pemodelan numerik menggunakan model SWAN pada software Delft3D-WAVE dengan input model gelombang yang bersumber dari data ECMWF-Era 5 di laut lepas. Hasil pemodelan numerik menunjukkan gelombang signifikan terbesar terjadi pada musim barat dengan nilai 1,25-2,975 m. Sedangkan tinggi gelombang signifikan terkecil terjadi pada musim timur dengan nilai 0,941-2,079 m. Verifikasi hasil tersebut terhadap data AVISO menghasilkan nilai MAPE sebesar 16,355%, koefisien korelasi sebesar 0,8691, RMSE berkisar 0,277 m yang menunjukkan validasi yang baik dan memuaskan.
Study Of Water Distribution Patterns and Temperature Changes in Waters Around Power Plant (Case Study of PLTU Tanjung Jati B Unit 5 & 6) Djazuli, Fajar Lemanza; Mukhtasor; Rahmawati, Shade
International Journal of Offshore and Coastal Engineering Vol. 9 No. 2 (2025):
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962//j225800914.v9i2.8928

Abstract

Sea cooling discharge refers to heated wastewater produced during the operational of a Steam Power Plant (PLTU). This effluent is typically discharged into the sea via an ocean outfall, a process that can significantly impact the surrounding marine environment and ecosystems. One of the primary consequences of this discharge is the elevation of seawater temperature in the vicinity of the outfall. This study aims to analyze the distribution patterns and temperature increases of seawater around the ocean outfall of Tanjung Jati B Power Plant Units 5 & 6. Numerical modeling was conducted using the Delft3D software, employing both the FLOW and WAVE modules to simulate the dispersion of thermal effluent and to assess temperature variations under different environmental conditions. The simulation results show that, during the west monsoon, the dispersion of thermal effluent predominantly extends toward the northeast, while during the east monsoon, the dispersion is mainly directed toward the west, northwest, and north. These findings underscore the significant influence of ocean currents and waves on the distribution of thermal effluent. Additionally, the maximum observed temperature increases of the thermal effluent reached 9°C, with the average area experiencing a temperature rise greater than 2°C measured at 932.16 m² during the west monsoon and 1,487.62 m² during the east monsoon, when comparing the 2024 dispersion pattern to the baseline seawater temperature in 2015. To mitigate the spread of thermal effluent, three alternative solutions are proposed: (1) extending the outfall structure, (2) evaluating and optimizing the design of the existing outfall. There are several potential approaches to minimize the dispersal of thermal wastewater, but further study is required to evaluate the effectiveness of these solutions.
Co-Authors Agoes Pratikto Asfarur Ridlwan Asfarur Ridlwan Dendy Satrio Dhanistha, Wimala Lalitya Djatmiko , Eko Budi Djazuli, Fajar Lemanza Eko Budi Djatmiko Frestiqauli, Santi Handayanu Handayanu Haryo Dwito Armono Hasan Ikhwani Hasan Ikhwani Hasan Ikhwani Herman Pratikno, Herman Ikhwani, Hasan Ismail Ali Hajar Aswad Ali Kurniati, Nani Mahmud Mustain Muhammad Zikra Mukhtasor Mukhtasor Mukhtasor Mukhtasor Mukhtasor Murdjito Murdjito Nani Kurniati Nur Aini Rakhmawati Pratikto, Agoes Ridlwan, Asfarur Rizki Mendung Ariefianto Rudi Walujo Prastianto Rudi Waluyo Prastianto Rudi Waluyo Prastianto Setiyo Gunawan Sholihin Sholihin Sholihin Silvianita, Silvianita Sujantoko Sujantoko Tuswan Tuswan Wahyudi Wahyudi Wahyudi Widi Agus Pratikto Wimala Lalitya Dhanis Wisnu Wardhana Wisnu Wardhana Yoyok Setyo Hadiwidodo Zikra, Muhammad