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Perencanaan Sistem Penyediaan Air Minum (SPAM) Pedesaan Dusun IV Desa Sumberejo Kabupaten Tanggamus Dwi May Juwita; Repinka Cornelia; Aqmal Satrio Dirgantara; Suprapto Suprapto; Ismadi Raharjo
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 2 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i2.890

Abstract

Fresh water is a basic need for human, so is  to be normal if the water sector gets priority in the handling and fulfillment. The springs are located in Dusun  Sumberejo IV should be able to meet the water needs of the local community. The purpose of this study was: (1) identify potential sources of raw water (water) in Dususn Sumberejo IV, (2) calculate the number of people that will be served as well as the need for clean water, (3) designing the layout and capacity of the reservoir, (4) determine the appropriate piping standards for Rural Fresh Water Supply System (SPAM), and (5) predict the draft budget piping. The method used is the discharge measurements, measurements of topography, socio-economic survey, the calculation of water requirements, head loss effective calculation and Budget Plan (RAB), whereas for hidraulic analysis using Epanet program. Results of fresh water supply planning is done for rural population projections to 2020 the number of 491 people, need for fresh water in the Dusun Sumberejo IV 0.32 liters/sec, discharge available in the spring Sumberejo is 0.35 liters/second then the discharge is still sufficient for the water needs until the year 2020. From the measurement results obtained topographic maps + 50.42 m height difference by elevation above sea level on the Bench Mark (a point of reference, the location of the source of raw water springs) + 446 m above sea level and at the end point measurement (area of service farthest) +399.57 m above sea level, so the system can distribuasi to the service area using gravity. The results of the hydraulic analysis using EPANET used PVC pipes with various diameters ranging from 12.5 to 50 mm with a length of 4876 meters and its accessories (accessories). Based on these forecasts Rural SPAM development requires an investment of around Rp. 89,000,000.00, then the system when the service is expected to last for 25 years as well as in the development of investment in the form of loans with mortgage interest (soft loans) amounted to 6% of the obtained water price per m3 in Dususn IV Sumberejo IV  around Rp. 1450.00/m3. Keywords: rural SPAM, gravitasi system EPANET
Analisis Hidrologi untuk Pendugaan Debit Banjir dengan Metode Nakayasu di Daerah Aliran Sungai Way Besai Repinka Cornelia; Suprapto Suprapto; Kelik Istanto
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 2 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i2.891

Abstract

Way Besai is one tributary Way Kanan located in West Lampung and Way Kanan  Regency, Lampung Province. Way Besai riverbanks downstream of the low areas during the rainy season in some locations overflowing river submerged. This condition is exacerbated by the destruction of the river catchment Way Besai resulting in flooding during the rainy season. The purpose of this study to estimate precipitation plan, and estimate the flood discharge plan using Nakayasu. Activities undertaken include the determination of the maximum daily rainfall, creation of Thiessen polygons, calculation of the maximum average rainfall, the calculation of the frequency distribution, determination of the suitability of the Chi Square test the method Gumbel and Log Pearson III method, the calculation of the design rainfall distribution, as well as the calculation of flood discharge by using Nakayasu method. The results of the calculation of rainfall plan (after the Chi Square test) were obtained for 10-year return period of 83.46 mm/day. Return period of 25 years at 105.41 mm/day. 50-year return period of 123.70 mm/day. Flood discharge plan obtained by unit hydrograph method Nakayasu of 244.15 m3/sec for a period of 10years, 308.35 m3/sec for 25-year return period and 361.83 m3/sec for a period of over 50 years. The time required for the peak flood from upstream to downstream for 19 hours. Keywords: analysis of hydrology, rainfall plan, and flood discharge plan