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Jurnal Irigasi

jurnal_irigasi
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Published by Puslitbang Sumber Daya Air

ISSN : 19075545 EISSN : 26154277 DOI : -

Core Subject : Agriculture, Engineering,

Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Engineering

Jurnal Irigasi merupakan publikasi ilmiah yang memuat hasil-hasil penelitian, pengembangan, kajian dan studi kasus terkait irigasi dan drainase. Ruang lingkup Jurnal Irigasi meliputi survei, investigasi, desain, akuisisi lahan, konstruksi, operasi, pemeliharaan di sistem irigasi yang ditinjau baik dari sisi teknis, ekonomi dan kelembagaan. Terbit pertama kali tahun 1986 dengan nama Jurnal Informasi Teknik dan pada tahun 2006 berganti nama menjadi Jurnal Irigasi. Jurnal Irigasi diterbitkan 2 (dua) kali dalam setahun yakni pada bulan Mei dan Oktober.

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Articles 6 Documents

Search results for , issue "Vol 11, No 1 (2016): Jurnal Irigasi" : 6 Documents clear

Efisiensi Sistem Irigasi Pipa untuk Mengidentifikasi Tingkat Kelayakan Pemberian Air dalam Pengelolaan Air Irigasi Afri Fajar; Muhammad Yanuar J. Purwanto; Suria Darma Tarigan
Jurnal Irigasi Vol 11, No 1 (2016): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Irrigation water loss that commonly occurs in an agricultural area are runoff and deep percolation. Pipe irrigation has reached 98% efficiency because it can control the use of water as needed and has no seepage for water supply. Distance of paddy field’s inlet should also be a considered factor aside from irrigation technology. Rice field’s inlet distance affect the water distribution in a fields plot as they relate to application efficiency (Ea) and the efficiency of water distribution (Ed). The method used in this research was descriptive method that collect primary data and secondary data. The experiment plots were installed with irrigation pipes. The results showed Ed values above 90% in conventional and System of Rice Intensification (SRI). This explains the distribution of water in pipe irrigation evenly throughout the planting area. Ea value on experimental plots ranged between 76% - 98%. This is because of the occurrence of deep percolation and surface flow at the conventional fields, which causes decrease in efficiency. The paddy field inlets distance simulation results showed that good Ea (≥ 90%) obtained at a distance of 30 m with SRI water application gave water saving up to 10,25%. The feasibility of the water application on the value of Ea was obtained from the level of application of irrigation water’s pattern to conventional paddy at vegetative phase is critical at a distance of 170 m, while the generative phase is critical at a distance of 75 m and very critical at 178 m. SRI paddy field gives the value of feasibility of providing water at vegetative phase becomes near critical at a distance of 170 m, while the generative phase becomes critical at a distance of 150 m.

Strategi Pengembangan Lahan Irigasi Rawa di Daerah Rawa Pasang Surut Belawang-Kalimantan Selatan Elias Wijaya Panggabean; Bangkit Aditya Wiryawan
Jurnal Irigasi Vol 11, No 1 (2016): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Swamp reclamation project that had been carried out by the Government of Indonesia in Sumatra and Kalimantan few decades ago was primarily aimed at strengthening national food security and transmigration project. However now, contribution of tidal swamp farming to national food security is still low. Instead, nowadays there are more irrigated swamp land that had been converted into oil palm or rubber plantations. Irrigated swamp field of Belawang (Barito Kuala Regent) is one of the area which had been widely converted to rubber plantations. Many factors lead to these phenomena. This study examined the key factors that led to land conversion and followed by formulating strategies to promote the role of irrigated swamp fields in supporting food security. The research was conducted in 2014 under quantitative approach and using SWOT analysis method. Data were obtained through in-depth interview towards key informants. This study suggested that the strategy for the development of irrigated tidal swamp in Belawang should be carried out by remapping the appropriate swamp type for food crops and plantations. Furthermore, planned commodity diversification is the answer for food security and local economic problems.

Ketidakpastian Model SWAT di Daerah Aliran Sungai Berlahan Sawah Irigasi Hanhan Ahmad Sofiyuddin; Tasuku Kato; Ryota Tsuchiya
Jurnal Irigasi Vol 11, No 1 (2016): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Soil and Water Assessment Tool (SWAT) is a very promising model in an agricultural watershed. However, the modeling approach could include uncertainties in its model structures especially if it is applied in watershed consisting irrigated paddy fields. This is due to SWAT was initially developed to model dry land agricultural area so that there were some different assumptions or model structures compared to common understanding in paddy field. However, the significance of model structure uncertainty to overall model performance is not yet clearly be understood. This study is aimed to analyze the performance, applicability, and uncertainties of SWAT (original/modified) to model watershed containing irrigated paddy field. The analysis was conducted through model structure evaluation and uncertainty analysis using the Sequential Uncertainty Fittin (SUFI-2) method by considering several SWAT model configurations, i.e. original and modified version. As the result, SWAT model structure cannot adequately represent the surface storage, seepage, and irrigation process in paddy field. Through calibration, these inadequate representation could be improved to have a better overall model performance indexes. However, significant difference in performance could be observed through uncertainty analysis. Modified SWAT model have better reliability i.e. narrower uncertainty band especially during low flow period. These results also imply that surface storage, seepage, and irrigation are some of the most important processes for hydrological simulation in irrigated paddy field watershed.

Rancangan Irigasi Sprinkler Portable Tanaman Pakchoy Ahmad Tusi; Budianto Lanya
Jurnal Irigasi Vol 11, No 1 (2016): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Sprinkler irrigation is one of the most efficient and effective effective irrigation. However, on-site application of sprinkler irrigation systems has encountered many obstacles, including the initial investment and operational costs. This study aimed to design a sprinkler irrigation system which saves the initial investment cost and simple in operation and maintenance, especially in the area where agricultural land were separated and small in area (0.10 to 0.30 ha) or without irrigation facilities. The research method in this study were the determination of the length and diameter of the pipe based on analysis of hydraulic pipe in lateral, manifolds and main pipe; sprinkler discharge calculation with volumetric method; and determination of irrigation uniformity with Christiansen method. The portable sprinkler irrigation system has specification: sprinkler nozzle head Impact Plactic type with nozzle size 4 mm, total height riser stick 1.3 meters in diameter ¾" elastic lateral pipe with a diameter of 2" and length 50 meters, pipe sub-main (manifold) and the main pipes of 2". The pump has a total head of 55 meters with a driving power of 5.5 HP, and suction hose 2". This sprinkler irrigation system can operate at operating pressure 1 to 4 bar. The discharge of sprinkler at a pressure of 1 bar is 0.12 l/s. Irrigation uniformity value resulted at a pressure of 1 bar was at 80%. To obtain the value of irrigation uniformity of more than 85%, it is advisable to use a minimum operating pressure of 2 bar.

Analisis Hidrodinamik Rotary Distributor Hidraulik Teknologi Ega-Sattira dan Pengembangannya untuk Irigasi Tetes-Putar Eko Winar Irianto
Jurnal Irigasi Vol 11, No 1 (2016): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Trickling filter is a wastewater treatment technology which has high effiency on organics reduction but low energy on its operation. Ega Sattira is the combined technology between constructed wetland and trickling filter technologies. One of the success on its treatment process is due to the hydraulic-rotary distributor. Hydrodynamic analysis on hydraulic-rotary distributor is required for making better and more efficient on Ega-Sattira’s operation and process system. The research objectives are: (a) to analize and formulate the hydrodynamic model on movement-force mechanisme of hydraulic-rotary distributor on Ega Sattira technology; (b) to utilize the the phenomenon of hydraulic-rotary distributor as an alternatif of drip-rotary irrigation technique which is part of water efficient irrigation; 3) to propose the basic desain on drip-rotary irrigation system that is easy, cost efficient and efficient in operation and maintenance. The results of hydrodynamic analysis shows that rotation number per time unit is directly proportional to the gravity acceleration, friction coefficient and root of the water level in the tank and critical flow coefficient, but inversely proportional to the diameter of rotary-distributor pipe. Calibration trial result between counting rotation and actual rotation resulted the equation Y= 0,0014X dengan r2= 0,82. The formulation result can be applied to the planning of hydraulic-rotary irrigation system supporting the technology of water-saving irrigation.

Kajian Kebutuhan Air dan Produktivitas Air Padi Sawah dengan Sistem Pemberian Air Secara SRI dan Konvensional Menggunakan Irigasi Pipa Najla Anwar Fuadi; Muhammad Yanuar J. Purwanto; Suria Darma Tarigan
Jurnal Irigasi Vol 11, No 1 (2016): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Limited water availability for agricultural land may cause decrease in rice production. The increase of crop production currently become a top priority in agricultural development. Productivity can be assessed through a subsystem of soil, water, and land patterns to use in certain periods. The applications of pipe irrigation with the combination of System of Rice Intensification (SRI) was capable to use water efficiently. Therefore, research concerning the calculation of water productivity of paddy rice which uses input pipe irrigation with conventional water supply system and SRI system is important to be conducted. The research steps were direct observation in the field, measurement of evapotranspiration, percolation, net field requirements and calculation of water productivity. The results showed that the production of rice was higher in water delivery system of SRI. Water productivity of paddy with SRI system also higher, where the water needs with a combination of pipe irrigation and water delivery systems in SRI were the best treatment. Water productivity in conventional rice fields was 0.82 kg/m3 and SRI 1.12 kg/m3. The combination of pipe irrigation and SRI systems showed high water productivity and efficient use of water.

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