Optimasi Pola Operasi Waduk Bendungan Sadawarna Kabupaten Subang

Ardiansyah, Muhammad Iqbal (2026) Optimasi Pola Operasi Waduk Bendungan Sadawarna Kabupaten Subang. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Waduk Sadawarna merupakan waduk multiguna yang berfungsi untuk memenuhi kebutuhan air irigasi, air baku, Pembangkit Listrik Tenaga Air (PLTA), dan pengendalian banjir. Namun, pengoperasian waduk saat ini masih menerapkan sistem early release karena jaringan irigasi dan sistem distribusi air baku belum beroperasi secara penuh. Kondisi tersebut menyebabkan pemanfaatan kapasitas tampungan waduk belum optimal. Oleh karena itu, diperlukan pengembangan pola operasi waduk yang mampu menyeimbangkan ketersediaan air, kebutuhan air, dan batas operasional waduk. Proyek Akhir ini bertujuan mengevaluasi pola operasi eksisting, menentukan pola operasi optimal pada kondisi tahun kering, normal, dan basah, serta menyusun pola operasi proyeksi periode 2025-2064. Tahapan analisis meliputi pengolahan data hidrologi dan klimatologi, pembangkitan data debit menggunakan metode Thomas-Fiering, proyeksi jumlah penduduk, perhitungan kebutuhan air baku dan irigasi, analisis potensi PLTA, simulasi neraca air, optimasi program linier menggunakan Microsoft Excel Solver dan Python, serta penelusuran banjir. Hasil analisis menunjukkan bahwa debit andalan 95% pada kondisi eksisting sebesar 2.95 m3/detik. Kebutuhan air irigasi dihitung berdasarkan luas daerah layanan sebesar 4.500 ha dengan beberapa alternatif pola tanam. Hasil optimasi menunjukkan bahwa pengaturan pelepasan dan tampungan waduk mampu mengurangi jumlah periode defisit serta meningkatkan periode surplus dibandingkan pola operasi eksisting, meskipun defisit masih terjadi pada beberapa periode proyeksi. Analisis potensi PLTA menghasilkan daya maksimum sebesar 2.00 MW dengan produksi energi mencapai 720 MWh dalam satu periode analisis. Hasil penelusuran banjir menunjukkan bahwa Waduk Sadawarna mampu mereduksi debit puncak dari 299.62 m3/detik menjadi 152.30 m3/detik atau sebesar 49.17% di Q1000, serta memperlambat waktu puncak aliran keluar selama sembilan jam. Elevasi maksimum waduk mencapai 80.67 meter dan masih berada di bawah elevasi aman sebesar 84.25 meter. Dengan demikian, pola operasi hasil optimasi lebih efektif dan adaptif dalam mendukung pemenuhan kebutuhan air, pembangkit energi, dan pengendalian banjir. Pola operasi tersebut tetap perlu dievaluasi secara berkala sesuai dengan perubahan kondisi hidrologi dan perkembangan kebutuhan air.
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Sadawarna Reservoir is a multipurpose reservoir designed to meet irrigation water demand, raw water demand, hydropower generation, and flood control requirements. However, the reservoir is currently operated using an early-release system because the irrigation network and raw water distribution system are not yet fully operational. This condition has resulted in the suboptimal utilization of the reservoir’s storage capacity. Therefore, it is necessary to develop a reservoir operation pattern capable of balancing water availability, water demand, and reservoir operational constraints. This Final Project aims to evaluate the existing operation pattern, determine optimal operation patterns under dry, normal, and wet-year conditions, and develop projected operation patterns for the 2025–2064 period. The analysis includes the processing of hydrological and climatological data, streamflow generation using the Thomas–Fiering method, population projections, calculation of raw water and irrigation water demands, hydropower potential analysis, water balance simulation, linear programming optimization using Microsoft Excel Solver and Python, and flood routing analysis. The results indicate that the 95% dependable flow under existing conditions is 2.95 m³/s. Irrigation water demand was calculated based on a service area of 4,500 ha using several alternative cropping patterns. The optimization results show that regulating reservoir releases and storage can reduce the number of deficit periods and increase surplus periods compared with the existing operation pattern, although deficits still occur during several projected periods. The hydropower analysis indicates a maximum power output of 2.00 MW, with energy production reaching 720 MWh within one analysis period. The flood routing results show that Sadawarna Reservoir can reduce the peak discharge of the Q1000 design flood from 299.62 m³/s to 152.30 m³/s, equivalent to a reduction of 49.17%, while delaying the peak outflow by nine hours. The maximum reservoir water level reaches an elevation of 80.67 m, which remains below the safe elevation of 84.25 m. Therefore, the optimized operation pattern is more effective and adaptive in supporting water demand fulfillment, power generation, and flood control. Nevertheless, the operation pattern should be periodically evaluated in accordance with changes in hydrological conditions and future water demands.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Waduk Sadawarna, Pola Operasi Waduk, Program Linier, Neraca Air, Pengendalian Banjir, Sadawarna Reservoir, Reservoir Operation Pattern, Linear Programming, Water Balance, Flood Control.
Subjects:	Q Science > QA Mathematics > QA9.58 Algorithms T Technology > T Technology (General) > T57.74 Linear programming T Technology > TC Hydraulic engineering. Ocean engineering > TC167 Dams, reservoirs T Technology > TC Hydraulic engineering. Ocean engineering > TC530 Flood control
Divisions:	Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User:	Muhammad Iqbal Ardiansyah
Date Deposited:	03 Aug 2026 08:18
Last Modified:	03 Aug 2026 08:18
URI:	http://repository.its.ac.id/id/eprint/141850

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