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All Journal Jurnal Energi Elektrik Mamangan Social Science Journal International Journal Multidisciplinary Science
Wattimena, Sefnath J
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Humanities Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences

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Investment Analysis Of The Masela Block Project. Will The Masela Block Become A Natural Resource Paradox? (A Pestle Analysis) Sandanafu, Sally Paulina; Leuhery, Lenora; Wattimena, Sefnath J; Patty, Meidylisa
Jurnal Ilmu Sosial Mamangan Vol 12, No 2 (2023): Special Issue
Publisher : LPPM Universitas PGRI Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22202/mamangan.v12i3.8108

Abstract

The unsustainable investment in the Masela block due to the recent pandemic has delayed several steps by the Maluku provincial government and local communities in realizing the investment capital participation (PI). This study aims to determine and analyze the factors that hinder the operation and investment in the Masela block. The analysis technique used in this study is the PESTLE analysis which is reinforced by secondary data and survey results and interviews with PT MEA, namely the industry appointed by the local government (BUMD) in implementing the investment capital participation in the Masela block and informants from the Latdalam and Lermatang village governments who know and are directly affected by the development of the Masela Block project. The results of this study indicate that the priority concentration of the Lermatang and Latdalam village communities is on the social and environmental aspects where there will be many social changes in the community's way of life so that this aspect must be truly considered because these two villages highly uphold customary and cultural values and depend on natural resources.
SISTEM PENGONTROL KETINGGIAN AIR PADA TANAMAN HIDROPONIK MENGGUNAKAN INTERNET OF THINGS Safira, Intan; Badriana; Ikhwanus, Muhammad; Asri; Wattimena, Sefnath J
Jurnal Energi Elektrik Vol. 14 No. 2 (2025): Jurnal Energi Elektrik
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/jee.v14i2.19598

Abstract

Hidroponik adalah salah satu metode pertanian yang semakin populer dalam menghasilkan tanaman yang sehat dan produktif tanpa menggunakan tanah sebagai media tumbuh. Keberhasilan pertanian hidroponik sangat tergantung pada pemantauan dan pengontrolan parameter lingkungan, terutama tinggi air dalam sistem hidroponik. Pada penelitian ini dibuatlah sistem pengontrol ketinggian air pada tanaman hidroponik. Adapun sistem kontrol yang digunakan untuk mengendalikan keseluruhan sistem adalah ESP32 dengan sensor water level, sensor ultrasonik dan RTC sebagai input. Sedangkan LCD, driver motor, pompa dan tampilan pada aplikasi blynk sebagai output. Guna memberikan kemudahan bagi pengguna (user) dalam melakukan sistem kendali dan proses monitoring secara realtime maka alat ini dirancang berbasis IoT. Berdasarkan pengujian diketahui bahwa sistem pengontrol ketinggian air pada tanaman hidroponik dapat beroperasi dengan baik sesuai dengan pemrograman yang telah dirancang. Nilai akurasi sensor ultarasonik pada pada penelitian ini adalah 98.93% dengan rata-rata presentase error sebesar 1.07%. Pada sensor water level data yang didapat berupa nilai analog, kemudian dikonversikan kedalam bentuk nilai real oleh ESP32 sesuai dengan pemrograman yang telah dilakukan. Dalam 1 hari (24 jam) pompa akan hidup selama 12 jam dan mati selama 12 jam. Grafik yang ditampilkan pada aplikasi blynk sesuai dengan data real sistem. Kondisi level air yang konstan menyebabkan grafik level air berbentuk lurus.
Micro Hydropower Potential Assessment for Sustainable Tourism Electrification: A Case Study of Taeno Waterfall, Ambon Lilipaly, Eka Rahmat Mahayani Anthonio Putera; Wattimena, Sefnath J; Sarwuna, Sefnath J Etwan; Tupamahu, Cendy S E; Nara, Obednego Dominggus; Latumaerissa, Hendrik Simon; Aprilyanto Khouw; Rumalatu, Gilbert A; Hatuwe, Azmain N
International Journal Multidisciplinary Science Vol. 5 No. 1 (2026): February: International Journal Multidisciplinary Science
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijml.v5i1.2637

Abstract

This study evaluates the technical and economic feasibility of micro hydropower development at Taeno Waterfall, Ambon, Indonesia, to support sustainable tourism electrification. Hydrological assessment was conducted using 10-year rainfall data (2014–2023) combined with the National Rural Electric Cooperative Association (NRECA) method to estimate streamflow in the absence of long-term discharge measurements. The results indicate an average annual rainfall of approximately 3619.92 mm and an estimated average discharge of 0.70 m³/s. Flow duration curve analysis produced dependable flows of Q50 = 0.63 m³/s, Q80 = 0.35 m³/s, and Q90 = 0.28 m³/s, confirming adequate water availability for year-round micro hydropower operation. Hydraulic analysis showed a gross head of 24 m with a net head of 22.44 m after accounting for friction and minor losses. Using a design discharge of 0.35 m³/s and an overall efficiency of 75%, the estimated electrical power output is approximately 58 kW, classified as micro hydropower. A crossflow turbine was identified as the most suitable technology due to its compatibility with medium-head and moderate-flow conditions, operational flexibility, and cost effectiveness. Estimated electricity demand for tourism facilities is approximately 30 kW peak load with annual consumption of 66 MWh, indicating that the proposed system can fully meet demand with surplus energy for future expansion. Economic analysis using the Indonesian electricity tariff of 0.086 USD/kWh yields an annual benefit of approximately 19,278 USD and a payback period of about 12 years. The findings demonstrate that Taeno Waterfall possesses strong potential for sustainable renewable energy implementation to support tourism development and local energy resilience.
Co-Authors Aprilyanto Khouw Asri Badriana, Badriana Hatuwe, Azmain N Latumaerissa, Hendrik Simon Lenora Leuhery Lilipaly, Eka Rahmat Mahayani Anthonio Putera Muhammad Ikhwanus Nara, Obednego Dominggus Patty, Meidylisa Rumalatu, Gilbert A Safira, Intan Sandanafu, Sally Paulina Sarwuna, Sefnath J Etwan Tupamahu, Cendy S E