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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Teknologi dan Rekayasa Sumber Daya Air Casuarina: Environmental Engineering Journal
Kharistanto, Robertus Tegar Kurnia
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Physics

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Studi Optimasi Distribusi Air di Daerah Irigasi Manikin, Kabupaten Kupang, Menggunakan Program Dinamik Kharistanto, Robertus Tegar Kurnia; Limantara, Lily Montarcih; Saputra, Anggara Wiyono Wit; Maulana, Mokhamad Rusdha
Jurnal Penelitian Pendidikan IPA Vol 11 No 6 (2025): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i6.11025

Abstract

This study aims to optimize water distribution in the Manikin Irrigation Area, Kupang Regency (200.98 ha), using deterministic dynamic programming to enhance irrigation efficiency and agricultural productivity. The cropping pattern follows a rice–rice–fallow system, wherein rice is cultivated in the first two seasons and land is left fallow in the third. Data used includes rainfall (2014–2023), irrigation discharge, crop water requirements, climatological parameters, and economic variables. The model maximizes profit as the objective function while considering three constraints: water availability, land area per season, and land area per irrigation stage. The study divides the irrigation network into eight stages and applies forward recursive and backtracking procedures to determine optimal water allocation. Before optimization, only 90 ha (44.78%) were irrigated in the first season and 170 ha (84.59%) in the second. After optimization, coverage increased to 190.23 ha (94.65%) and 200.98 ha (100%), respectively. Corresponding profits rose by 117% in the first season and 18% in the second. These results demonstrate that dynamic programming effectively improves water use efficiency and land productivity in water-limited agricultural systems.
Studi Dasar Kesehatan Lingkungan di Kecamatan Hu’u, Sumbawa Barat, NTB, Indonesia: Bahasa Indonesia Kharistanto, Robertus Tegar Kurnia; Aprilia, Hesti Dwi; Fahlevy, Karizma; Sembiring, Agustinus; Suroso, Adi
Casuarina: Jurnal Teknik Lingkungan Vol 3 No 1 (2025): CEEJ OCT 2025
Publisher : LRI Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/ceej.v3i1.4937

Abstract

Good environmental quality is essential to support the optimal life and development of communities. Hu’u District, Dompu Regency, possesses abundant natural resource potential; however, human activities, especially agriculture, can affect the local environmental conditions. This study aims to evaluate the environmental health status in Hu’u District, focusing on groundwater quality, soil, and air parameters based on the standards outlined in the Regulation of the Minister of Health of the Republic of Indonesia Number 2 of 2023. Sampling conducted during the wet season (February–March 2023) at nine groundwater locations, ten soil locations, and five air sampling sites around villages in Hu’u District. Physical, chemical, and microbiological analyses were performed to assess water and soil quality. The results showed that several groundwater parameters, such as color, turbidity, and total dissolved solids (TDS), exceeded the established thresholds, likely due to natural organic matter, mineral dissolution, and agricultural activities. Total coliform bacteria were detected at several points, indicating potential domestic waste contamination, although Escherichia coli was not found. Concentrations of heavy metals include Barium (Ba), Copper (Cu), and Zinc (Zn), in some soil locations exceeded quality standards, suspected to be associated with agricultural activities and active geological characteristics. Additionally, air quality for chemical parameters is classified as good, but CO concentrations need to be prioritized for monitoring as its potential to increase due to the burning of agricultural waste activities. These findings provide an important basis for developing adaptive environmental management policies in Hu’u to maintain ecosystem sustainability and community quality of life.
Studi Optimasi Pemanfaatan Air Irigasi Menggunakan Program Linier Pada Daerah Irigasi Manikin Kabupaten Kupang Kharistanto, Robertus Tegar Kurnia; Limantara, Lily Montarcih; Soetopo, Widandi
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 3 No. 1 (2023): 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.2023.003.01.42

Abstract

Manikin Area of Irrigation irrigates 201.87 hectares of rice fields, located in NTT which is known for its long dry season, this directly affects the availability ofwater for irrigation. So that the availability of water during the dry season is sufficient and can irrigate the fields, optimization is carried out on the area of plants to be irrigated using the available water availability with the linear programming method in order to get the optimal planting area and the benefits obtained are also more optimal. This study was conducted by optimizing the existing cropping pattern and adding three alternative cropping patterns as an option at 80% (dry), 50% (normal), and 30% (wet) discharge. After optimizing all mainstay discharges, the average water balance which can only be met by 80% of the fulfilled period can be maximized to 100% of the fulfilled period, with details for the existing planting intensity of 200%, and a profit of Rp. 4,643,010,000, alternative 1 has a planting intensity 269.78%, anda profit of Rp. 6,234,664,440, alternative 2 has a planting intensity of 300%, and a profit of Rp. 6,915,540,000, alternative 3 has a planting intensity of 269.78%, and a profit of Rp. 5,854,139,490. Alternative 2 cropping pattern with rice-paddy/peanutrice was chosen as the best one to implement because it has an optimal planting intensity of 300% and a profit of Rp.6,915,540,000 per year, which is greater than Rp. 2,272,530,000 from the profit of the existing cropping pattern which is only Rp. 4,643,010,000 per year. Daerah Irigasi Manikin mengairi sawah seluas 201,87 hektar, terletak di NTT yang dikenal dengan musim kemarau panjang, hal tersebut secara langsung berpengaruh pada ketersediaan air untuk irigasinya. Agar ketersediaan air saat musim kemarau tercukupi dan dapat mengairi sawah, dilakukan optimasi pada luas areal tanaman yang akan diairi menggunakan ketersediaan air yang ada dengan metode program linier supaya mendapatkan luasan tanam yang optimal dan keuntungan yang didapat juga lebih optimal. Studi ini dilakukan dengan pengoptimalan pola tanaman di lapangan dan penambahan tiga pola tanam alternatif sebagai pilihan pada debit andalan 80% (kering), 50% (normal), dan 30% (basah). Setelah dioptimasi pada semua debit andalan, rerata neraca air yang hanya dapat tepenuhi 80% periode tercukupi dapat di maksimalkan ke 100% periode tercukupi, dengan rincian untuk eksisting memiliki intensitas tanam 200%, dan keuntungan Rp.4.643.010.000, alternatif 1 memiliki intensitas tanam 269,78%, dan keuntungan Rp.6.234.664.440, alternatif 2 memiliki intensitas tanam 300%, dan keuntungan Rp.6.915.540.000, alternatif 3 memiliki intensitas tanam 269,78%, dan keuntungan Rp.5.854.139.490. Pola tanam alternatif 2 dengan tanaman padi- padi/kacang tanah-padi dipilih sebagai yang terbaik untuk dilaksanakan karena memiliki intensitas tanam yang optimal 300% dan keuntungan sebesar Rp.6.915.540.000 per tahun lebih besar Rp. 2.272.530.000 dari keuntungan pola tanam eksisting yang hanya Rp.4.643.010.000 per tahun.
Co-Authors Anggara Wiyono Wit Saputra, Anggara Wiyono Wit Aprilia, Hesti Dwi Fahlevy, Karizma Lily Montarcih Limantara Maulana, Mokhamad Rusdha Sembiring, Agustinus Suroso, Adi Widandi Soetopo