Optimalisasi Pola Tata Tanam Pada Daerah Irigasi Widoro Kabupaten Trenggalek

Lisendra, Naufal Kurnia (2026) Optimalisasi Pola Tata Tanam Pada Daerah Irigasi Widoro Kabupaten Trenggalek. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 2036211066-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (26MB) | Request a copy

Abstract

Daerah Irigasi Widoro yang memiliki luas total sebesar 2,946 ha yang terbagi untuk dua daerah, yaitu daerah Trenggalek sebesar 1411 ha dan daerah Tulungagung sebesar 1,535 ha ini sering mengalami kekeringan pada musim kemarau yang dapat menurunkan produktivitas panen pada daerah irigasi tersebut. Tercatat intensitas tanam yang didapatkan oleh daerah irigasi ini pada musim tanam 2023/2024 yaitu sebesar 200% untuk wilayah Trenggalek dan 230.88% untuk wilayah Tulungagung. Oleh karena itu, pada musim tanam 2024/2025 terdapat perubahan Rencana Tata Tanam Global (RTTG) yang semula berisikan kombinasi tanaman padi dengan palawija, kini menjadi tanaman palawija saja. Metode analisis yang digunakan meliputi debit ketersediaan yang berasal dari intake kanan Bendung Munjungan dilanjutkan dengan analisis debit kebutuhan untuk pola tanam, evapotranspirasi serta curah hujan efektif untuk tanaman. Penentuan pola tanam optimal dilakukan dengan melakukan penambahan debit ketersediaan dengan menggunakan debit limpasan dari Bendung Munjungan, pergeseran musim tanam dan pengurangan luas lahan yang tertanam agar debit kebutuhan dapat memenuhi debit ketersediaan yang ada. Setelah itu dilanjutkan mencari nilai intensitas tanam dengan menerapkan add-in solver dan menghitung keuntungan menggunakan metode Benefit Cost Ratio (BCR). Dari analisa yang telah dilakukan diperoleh debit ketersediaan tertinggi sebesar 3,316 liter/ha dan terendah sebesar 699 liter/detik. Analisa debit kebutuhan diperoleh debit rata-rata pada Daerah Irigasi Widoro sebesar 1392.35 liter/detik pada pola tanam eksisting, sedangkan untuk pola tanam optimal pada Bulan November periode II diperoleh debit kebutuhan rata-rata sebesar 536.52 liter/detik. Pada pola tanam optimal diperoleh luas lahan tertanam pada Daerah Irigasi Widoro seluas 2,946 ha pada musim tanam hujan, 1891 ha pada musim tanam kemarau I, dan 576 ha pada musim tanam kemarau II dengan intensitas tanam sebesar 183.74%. Keuntungan yang diperoleh dari pola tanam optimal ini sebesar Rp. 84,361,605,000 dengan nilai Benefit Cost Ratio (BCR) 1.65.
=========================================================================================================================================
The Widoro Irrigation Area, which has a total area of 2,946 hectares divided into two regions, namely the Trenggalek region with 1,411 hectares and the Tulungagung region with 1,535 hectares, often experiences drought during the dry season, which can reduce the harvest productivity in the irrigation area. The recorded planting intensity achieved by this irrigation area in the 2023/2024 planting season was 200% for the Trenggalek region and 230.88% for the Tulungagung region. Therefore, in the 2024/2025 planting season, there will be a change in the Global Planting Plan (RPTG), which initially included a combination of rice and secondary crops, now consisting solely of secondary crops. The analysis method used includes the availability flow rate from the right intake of the Munjungan Weir, followed by the analysis of the demand flow rate for planting patterns, evapotranspiration, and effective rainfall for crops. The determination of the optimal planting pattern is carried out by increasing the availability of discharge using the runoff discharge from the Munjungan Weir, shifting the planting season, and reducing the area of planted land so that the required discharge can meet the available discharge. After that, the search for the planting intensity value is continued by applying the add-in solver and calculating the profit using the Benefit Cost Ratio (BCR) method. From the analysis that has been conducted, the highest availability debit was obtained at 3,316 liters/ha and the lowest at 699 liters/second. The analysis of the demand debit showed an average debit of 1,392.35 liters/second in the existing planting pattern in the Widoro Irrigation Area, while for the optimal planting pattern in November period II, the average demand debit was 536.52 liters/second. In the optimal planting pattern, the area of planted land in the Widoro Irrigation Area was 2,946 ha during the rainy season, 1,891 ha during the first dry season, and 576 ha during the second dry season, with a planting intensity of 183.74%. By shifting the start of the planting season and reducing the area of planted land, an increase in planting intensity of 7.38% was achieved compared to the existing planting pattern. The profit obtained from this optimal planting pattern is Rp. 84,361,605,000 with a Benefit Cost Ratio (BCR) of 1.65.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Add-in solver, Benefit Cost Ratio, Daerah Irigasi Widoro, Intensitas tanam, Add-in solver, Benefit Cost Ratio, Cropping Intensity, Widoro Irrigation Area
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC812 Irrigation
Divisions:	Faculty of Vocational > 22301-Civil Infrastructure Engineering (D4)
Depositing User:	Naufal Kurnia Lisendra
Date Deposited:	04 Aug 2026 04:03
Last Modified:	04 Aug 2026 04:03
URI:	http://repository.its.ac.id/id/eprint/142910

Actions (login required)

View Item