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All Journal Jurnal Teknik Pengairan: Journal of Water Resources Engineering Jurnal Teknologi dan Rekayasa Sumber Daya Air
Montarcih Limantara, Lily
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Earth & Planetary Sciences Engineering

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Studi Optimasi Alokasi Air Irigasi Menggunakan Program Dinamik Pada Daerah Irigasi Cau Kabupaten Madiun Ireldi Pratama, Faris; Montarcih Limantara, Lily; Sholichin, Moh.
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 6 No. 1 (2026): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2026.6.1.11

Abstract

Daerah Irigasi Cau memiliki permasalahan pada kondisi eksistingnya yaitu kondisi defisit air dimana jumlah kebutuhan air lebih banyak dibandingkan dengan ketersediaannya yang terjadi pada musim hujan, Musim Kemarau I dan II. Sehingga, pengoptimasian alokasi air menggunakan program dinamik deterministik perlu dilakukan. Tujuan dari optimasi ini adalah untuk dapat memaksimalkan keuntungan hasil tani dengan cara membagi daerah irigasi menjadi beberapa stage agar nantinya air akan dilokasikan ke setiap stage sesuai kebutuhan agar mendapatkan keuntungan maksimal. Fungsi kendala dalam optimasi adalah debit yang tersedia dan luas lahan. Fungsi tujuan optimasi adlaah keuntungan maksimal hasil tani. Hasil dari optimasi dengan program dinamik didapatkan peningkatan luas lahan sebesar 12,33% di musim tanam I, 8,42% di musim tanam II dan 38,90% di musim tanam III dengan keuntungan untuk setiap musim tanam adalah Rp. 13.296.184.959,00, Rp. 9.536.165.030,00, dan Rp. 6.337.986.652,00.
Development of Synthetic Unit Hydrograph Parameters from the Influence of Watershed Form Factor Hayati, Maulida; Montarcih Limantara, Lily; Prasetyorini, Linda
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 17 No. 1 (2026): In Press
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2026.017.01.4

Abstract

The Synthetic Unit Hydrograph (HSS) is a predictive model used in hydrological analysis to estimate river flow response due to design rainfall, playing an important role in water infrastructure planning and flood mitigation strategies. This study aims to develop HSS parameters by quantitatively analyzing the relationships between the Watershed Form Factor (FD), peak discharge (Qp), and peak time (Tp). The study covered 10 watersheds on Java Island, which were selected to represent a wider and more diverse range of hydrological characteristics. The methods used include morphometric analysis to determine FD as a ratio between the area and perimeter of the watershed, hydrograph analysis to obtain unit hydrographs in each watershed/subwatershed, and statistical correlation analysis to examine the relationship between FD and hydrographs. The results showed that FD has a significant negative linear relationship with Qp (R = -0.802) and Tp (R = -0.820), indicating that the larger the watershed shape, the smaller the FD value, leading to an increase in peak discharge and peak time. This finding has significant implications for the development of the SUH model, particularly in watersheds with limited hydrological data. By including FD in the SUH parameter formulation, hydrograph estimation becomes more accurate, supports water resources planning, and improves the effectiveness of flood mitigation strategies and drainage system design.
Co-Authors Ireldi Pratama, Faris Linda Prasetyorini Maulida hayati Moh. Sholichin