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Journal : Civil Engineering Journal

Sinus Optimization Method for Multi Reservoir Operation by Using Multipurpose Simulation Model Ahmadi, Yudha T.; Sholichin, Moh.; Limantara, Lily M.; Asmaranto, Runi
Civil Engineering Journal Vol. 12 No. 3 (2026): March
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-03-011

Abstract

This research intends to apply the multiplication sinus method to optimize two parallel reservoirs, namely the Tugu and Bagong reservoirs, in order to increase the efficiency of multipurpose water resource utilization for irrigation, raw water supply, micro-hydro electrical power (PLTMH), and flood control. The methodology consists of optimizing water allocation during low-flow conditions for the two parallel reservoirs with multiple purposes. For irrigation, the multiplication sinus method is used, while the other purposes are optimized using a simulation model with the objective function of maximizing the net benefit. Meanwhile, flood control under high-flow conditions is addressed through simulation by optimizing gate openings. The results show that the strategy of valve opening at the initial stage of a flood event significantly reduces the volume of flood storage required. This makes it possible to increase the reservoir water level, thereby directly increasing the potential of water energy without exceeding the river channel capacity downstream. Specifically, in the Tugu reservoir, flood storage is reduced from 1.8 million m³ to 1.3 million m³, with a peak discharge of 124.5 m³/s, which remains below the downstream river capacity (approximately 125 m³/s). Meanwhile, in the Bagong reservoir, flood storage can be reduced from 5.2 million m³ to 4.3 million m³, with a peak discharge of 41.9 m³/s, which is still safe and below the river capacity (approximately 44 m³/s). This efficiency proves that coordinated flood management between two parallel reservoirs can be carried out without sacrificing other interests. From the economic benefit perspective, the annual total value generated by the Tugu reservoir reaches a maximum of Rp. 136 milliard and a minimum of Rp. 117 milliards, with the main contribution coming from irrigation water supply. Likewise, the Bagong reservoir produces the highest annual benefit of Rp. 93.5 milliard and the lowest of Rp. 83.7 milliard, which comes entirely from irrigation.
Co-Authors A.A. Ketut Agung Cahyawan W Adhiwirawan, Patria Aditiya, Achmad Rizkiawan Agus Budiarto Ahmadi, Yudha T. Aini Amalia, Ayu Khurotul Al Huda, Reja Palevi Andini, Rika Septian Andre Primantyo Hendrawan Anggara Wiyono Wit Saputra Anggara Wiyono Wit Saputra, Anggara Wiyono Wit Ardiningrum, Nadia Fidela Ardiyansah, Ilham Ari Wahjudi Aristantha, Fatan Assajjad, Nurrohman Adi Ayu, Mirsa Azzahra, Arrum Berlian Gari Amrina Beselly Putra, Sebrian Mirdeklis Bias Angga Permana Cunanda, Yana Denny Widhiyanuriyawan Denny Widhiyanuriyawan Dermawan , Very Dhoni Maranata Dian Sisinggih Donny Harisuseno Dwi Priyantoro Efendy, Fatkhulloh Utsman Emma Yuliani Eric Virgiawan Aryadi Ery Suhartanto Evi Nur Cahya Fathinun Najib Fathurrahman, Alfa Anshori Fayiz, Naufal Muhammad Firmanda, Andry Riski Fitria Nur Khoirina, Fitria Nur Ghaisani, Amalia Hafifah, Dwi Tiya Ayu Hakim, Anita Maulidiyah Rahma Handini, Maya hari siswoyo Haris Djafar, Haris Hendrawan, Andre Heri Suprijanto Hezron, Yoel Dongan Hidayat, Muhammad Nurjati Ibnu Romadona, Teuku Ihza Ibnu Widodo Ilmiawan, Ahlun Nazar Islami, Fikry Asri Jadfan Sidqi Fidari Juldah, Hailal Kasyful Haq, Muhammad Fariz Leo Arbi Wibowo Lily Montarcih Limantara Limantara, Lily M. Linda Prasetyorini M. Amar Sajali M. Bisri M. Ruslin Anwar Maftuch Maftuch Majid, Haidar Naufal Mangku Purnomo Mangku Purnomo mas'udi, oldvika nurma Maulana, Muhammad Adnan Maulida, Diah Fitri Melvin Al Ishar Mike Yuanita Milleanisa, Khofifah Endar Moh. Sholichin Mohammad Bisri Mohammad Taufiq Muammar, Adhitya Zein Muhammad Adhitya Aldi Muhammad Rifai Muhtasar, Iqbal Maulana Murdhianti, Ari Murdhianti, Ari Nadjadji Anwar Nisa, Awwalin Rakhmatun Nugroho, Ibnu Sam Nurhaliza, Salma Palla, Anna Pane, Yasmin Pebriani Sitorus Pangestu, Bima Aji Pitojo Juwono Pitojo Tri Juwono Pramana, Fabian Raditya pratama putra, i wayan ari yoga Pratama, Rizki Ramadhani Prima Hadi Wicaksono Purnomo, Yehezkiel Christian qoidulhaq, fayyadh Rahmah Dara Lufira Rahman, Kurdianto Idi Ramadhan, Yudhistira Akbar Zulfikar Ramadhanti, Banyu Bening Rasyid, Feby Fetryanti Redi Bintarto, Redi Ria Asih Aryani Soemitro Rio Trianto, Rio Rispiningtati Rispiningtati Riyanto Haribowo Rizqy, Nabilah Rosdiyono, Anangga Rubianto, Prasetyo Rubiantoro, Prasetyo Rudianto Raharjo Saifuddin Zuhri, Muhammad Iqbal Sanwa, Niken Wibasari Sari, Rika Rahma Setiawan, Ribut Setiawan, Yahya Eko Maryanto Sholichin, Moh Siregar, Muhammad Rafi Sri Sudaryanti, Sri Subhan Ramdlani Sugiarto Sugiarto S Sugiarto Sugiarto Sumanto, Hari Suryono, Antonius Suwanto Marsudi Syafira, Annisa Zuyyinani'ma Teguh Dwi Widodo Torimtubun, Angelina Tuhepaly, Firman Syarif Ussy Andawayant, Ussy Ussy Andawayanti Very Dermawan Wahyu Nafier A. Wahyu Sejati Wardana, Fathurrozi Ibnu Widodo, Yudo Wahyu Wirda Wirda Yahya, Irsyad Musthofa ‪L. Tri Wijaya Nata Kusuma