Pemanfaatan Air Tanah Dangkal untuk Irigasi Padi Menggunakan Pompa Berbahan Bakar LPG
Abstract
Abstract
The objective of this study was to evaluate performance of LPG-fueled single cylinder pump enginein utilizing shallow groundwater for rice field irrigation. Research was conducted in Baktirasa Village, Subdistrict of Sragi, Regency of South Lampung during planting session of September–December 2015 by observing and analyzing technical and economical performance of LPG-fueled pump engine. Observation was performed on the depth of groundwater before and after pumping, pumping duration, discharge, LPG consumption, and depth of standing water. Irrigation cost was evaluated using local prices for installation and manpower. Results of the research showed that shallow groundwater is potential to be explored as asource of paddy field irrigation. Depth of water table was substantially low at 3.41 m and decrease to 4.83m after continuous pumping for about 6.5 hours. The LPG-fueled pump engine worked smoothly at an average gas consumption of 0.464 kg/h with a field capacity of 0.0190 ha/h and a discharge rate of 14.58 m3/h. The distribution uniformity of 92.28% was achieved with average depth of standing water of 4.12 cm. The cost of irrigation operation was IDR 226,875.23/ha, lower than leasing one (IDR 400,000.00 /ha).
Abstrak
Penelitian ini berujuan untuk mengevaluasi kinerja mesin pompa satu silinder berbahan bakar LPG dalam memanfaatkan air tanah dangkal untuk irigasi sawah pada musim kering. Penelitian dilakukan di Desa Baktirasa, Kecamatan Sragi, Lampung Selatan dengan menganalisis kinerja teknis dan ekonomi penggunaan pompa berbahan bakar LPG pada musim tanam September–November 2015. Pompa irigasi 4.9 hp diuji sebanyak lima kali pada lima petak sawah (masing-masing 1250 m2). Parameter yang diamati meliputi kedalaman air tanah sebelum dan sesudah pengoncoran, lama pengoncoran, debit pompa, konsumsi LPG, tinggi genangan air, dan keseragaman distribusi (DU). Biaya irigasi dihitung berdasarkan harga setempat untuk pemasangan sumur dan upah kerja. Hasil penelitian menunjukkan bahwa air tanah dangkal di Desa Baktirasa berpotensi untuk dikembangkan sebagai sumber irigasi. Kedalaman air tanah cukup rendah, yaitu 3.41 m sebelum pemompaan dan turun menjadi 4.83 m setelah pemompaan selama sekitar 6.5 jam terus-menerus. Pompa berbahan bakar LPG bekerja dengan baik dengan kapasitas 0.0190 ha/jam pada debit 14.58 m3/jam, dan konsumsi LPG 0,464 kg/jam. Ketinggian genangan rata-rata 4.12 cm dengan DU 92.28%. Biaya irigasi adalah Rp 226,875.23/ha per sekali oncoran, lebih rendah daripada sewa
Rp 400.000,00/ha.
References
of irrigation uniformity on irrigation water
requirements. Water Science and Application
Vol. 28(2): 235-242.
Ayars, J.E., E.W. Christen, R.W. Soppe and W.S.
Meyer. 2006. The resource potential of in-situ
shallow ground water use in irrigated agriculture:
A review. Irrigation Science Vol. 24: 147-160.
Bortolini, L. and M. Martello. 2014. Effects of water
distribution uniformity on waxy corn (Zea mays
L.) yield: Preliminary Results. Journal of Water
Resource and Protection Vol. 6: 1037-1044.
Bouman, B.A.M. and T.P. Tuong. 2001. Field water
management to save water and to increase its
productivity in irrigated lowland rice. Agriculture
Water Management Vol. 49: 11-30.
BRI (Bank Rakyat Indonesia). 2016. Kredit Usaha
Rakyat BRI. http://www.bri.co.id/articles/61 (10
Desember 2016).
Burt, C.M., A.J. Clemmens, T.S. Strelkoff, K.H.
Solomon, R.D. Bliesner, L.A. Hardy, T.A.
Howell and D.E. Eisenhauer. 1997. Irrigation
performance measures: Efficiency and
uniformity. Journal of Irrigation and Drainage
Engineering Vol. 123(6): 423-442.
Camp, C.R., E.J. Sadler and W.J. Busscher. 1996.
A comparison of uniformity measures for drip
irrigation systems. Transactions of the ASAE
Vol. 40(4):1013-1020.
Fibria, M. dan Maymuchar. 2012. Pemanfaatan
LPG sebagai bahan bakar sepeda motor dan
karakteristik minyak lumasnya. Lembaran
Publikasi Minyak dan Gas Bumi, Vol. 46(1): 35-
42.
Grismer, M.E. and K.M. Bali 2015. Drought Tip – Use
of Shallow Groundwater for Crop Production.
Agricultural and Natural Resources Publication
8521: 6 p.
Kalsim, D.K. 2010. Irigasi Pompa, dalam Kalsim,
D.K., B.I. Setiawan, A. Sapei, Prastowo, dan
Erizal (ed). Perancangan Irigasi dan Drainase
Interaktif Berbasis Teknologi Informasi.
Departemen Teknik Pertanian, Fakultas
Teknologi Pertanian, Institut Pertanian Bogor.
Legiyem, 2012. Faktor-faktor yang Mempengaruhi
Produksi Padi Di Rawa Sragi Kabupaten
Lampung Selatan (Tesis). Program Studi
Magister Manajemen, Program Pasca Sarjana,
Universitas Terbuka.
Liu, E., S.Y. Yue and J. Lee. 1997. A Study on LPG
As A Fuel For Vehicles. (Report). Legislative
Council Secretariat, Hong Kong. 27 p.
Maftukhah, R., R. Erni, H.P. Benito, R. Sri, and S.A.
Sigit, 2015. Shallow water depth management
to enhance rice performances under System
of Rice Intensification (SRI) framework. Jurnal
Irigasi Vol. 10(1): 41-48.
Namara, R.E., J.A. Awuni, B. Barry, Giordano, M.,
L. Hope, E.S. Owusu and G. Forkuor. 2011.
Smallholder shallow groundwater irrigation
development in the upper east region of Ghana.
(IWMI Research Report 143). International
Water Management Institute, Colombo, Sri
Lanka: 35p. doi: 10.5337/2011.214.
Notohadiprawiro, T. 2006. Rasionalisasi
penggunaan sumberdaya air di Indonesia.
Jurusan Ilmu Tanah, UGM, Yogyakarta.
http://soil.faperta.ugm.ac.id/tj/19XX/19xx%20
RASIONALISASI.pdf
RNAM (Regional Network for Agricultural
Machinery). 1995. Test Codes & Procedures
for Farm Machinery. Economic and Social
Commission for Asia and the Pacific, UN,
Bangkok.
Sinurat, M.R. 2000. Analisis Kelembagaan dalam
Pengelolaan Sumberdaya Pesisir Di Wilayah
Pesisir Timur Rawa Sragi Kabupaten Lampung
Selatan (Tesis). Program Studi Pengelolaan
Sumberdaya Pesisir dan Lautan, Program
Pasca Sarjana, Insitut Pertanian Bogor.
Subagyono, K., A. Dariah, E. Surmaini dan U.
Kurnia. 2004. Pengelolaan Air Pada Tanah
Sawah,dalam Tanah Sawah dan Teknologi
Pengelolaannya (Editor: Agus, F., Adimihardja,
A., Hardjowigeno, S., Fagi, A.M., dan Hartatik,
W.). Pusat Penelitian dan Pengembangan
Tanah dan Agroklimat (Puslitbangtanak), Bogor.
p. 223-226.
Susastriawan, A.A.P., J. Waluyo and K. Muhajir.
2015. Development of LPG motorcycle for rural
village in Indonesia. International Journal of
Engineering Research & Technology (IJERT)
Vol. 4(07): 507-509.
Wahed, M.H.A., M. Medici and G. Lorenzini. 2016.
Sprinkler irrigation uniformity: Impact on the
crop yield and water use efficiency. Journal of
Engineering Thermophysics Vol. 25(1): 117-125.
Wiryawan, A.G.P. 2015. Efektivitas Pengelolaan
Irigasi Dengan Sumur Pompa Di Kecamatan
Negara, Kabupaten Jembrana. (Tesis). Program
Pascasarjana, Universitas Udayana, Denpasar.
Yanti, D dan D. Setiawan. 2012. Analisa nilai
manfaat irigasi pompa dangkal ditinjau dari
keberlanjutan sumber daya air untuk pertanian.
Jurnal Teknologi Pertanian Andalas. Vol. 16: 72-
85.
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