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Korelasi Perlakuan Lapang terhadap Galat Tereduksi Poligon Terbuka Didik Kuswadi; Kelik Istanto; Iskandar Zulkarnain
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 3 No 2 (2011)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v3i2.809

Abstract

The surveyor often apply unreferenced opened traverse method in basic framework surveying defined, especially, surveying which emphasized in long trace surveying. The objectives of this research are (1) Define procedure in unreferenced opened traverse in order that it may be corrected and (2) Predict similar nomenclature coordinates deviation value of unreferenced opened traverse and unreferenced one with treatments. Geometric approach as treatment was given in four points of unreferenced opened traverse by reading ruler marks, horizontal, and vertical angels which referenced to prior point and prior one with defined interval. The both computation result show that the treatment done able to reduce similar nomenclature coordinates deviation of unreferenced opened traverse to closure traverse. Systematic errors reduced was defined as reducing area which made by unreferenced opened traverse coordinates and it one with treatment to closure traverse. The reduce value was 42,888 m2 to 28, 326 m2 or in percent the systematic errors reduced was 33,95 %. Keywords: field treatment, traverse, systematic errors reduced
Simulasi Koefisien Parameter DAS dalam Membangkitkan Debit Sintesis dengan Metode Nreca (Studi Kasus pada DAS Sekampung Propinsi Lampung) Andy Eka Saputra; Kelik Istanto; Iskandar Zulkarnain
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 4 No 1 (2012)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v4i1.823

Abstract

This study aims to create a simulation of watershed parameters in the coefficient generating discharge data by the method of synthesis of NRECA at watershed Sekampung. The research was conducted at Polytechnic Lampung in August and November 2011. Search the data using charts NRECA created four stages of simulation, of the four simulations have started to show a trend following observations have been made. From the results of the simulation parameters to manufacture-4 is closer to a state of observation and calculation. This is shown by - average number of discharges with the same observation. Visually, the graph is closer to the observation that the model parameters can be used to predict the amount of discharge, especially in watershed areas compatriot Lampung Province. The best simulation on the simulation of the four obtained values of model parameters correlation coefficient Qobs Vs Qsim of 0.27 with the watershed parameters Sinitial: 50, Gwinitial: 50, SNOM: 100, Krech: 0.85, 0.63 K Base and CF: 0.72. included in watershed characteristics that have characteristics of watersheds with high permeable aquifers and discharge the small mainstay. Keywords: NRECA, model parameters, DAS, discharge synthesis
Perencanaan Kolam Stabilisasi Untuk Penanganan Air Lindi (Leachate) Pada Calon Tempat Pembuangan Akhir (TPA) Kabupaten Mesuji Ismadi Raharjo; Suprapto Suprapto; Iskandar Zulkarnain
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 5 No 1 (2013)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v5i1.830

Abstract

Land sites of Final  Processing Disposal (TPA) Mesuji district has a relative flat  topographic  with a 3,20 ha area, the extents of the allocation of land use is planned landfill  area  2.60 ha and the remaining  0.60 ha as  area supporting infrastructure.  From the analysis of the water balance in  landfill sites was obtained  percolation 39 mm/month, with an area of landfill area of 2.60 ha planned then be generated leachate (leachate) that must be managed as much as 33.2 m3/day.  Leachate treatment plan using stabilization pond method consisting of an anaerobic pond with  a detention time  of 12 days and an 398.40 m3 capacity will reduce pollutants leachate influent BOD around 1500 mg/lt be 288.46 mg/lt; Facultative pond with a detention time  of 8 days and a capacity of 265.60 m3 pond will reduce pollutants leachate influent BOD 288.24 mg/lt be 79.51 mg/lt, and  Maturasipond  with a detention  of 10 days and a capacity of 322 m3 pond will reduce the material influent BOD of leachate pollutant 79.51 mg/lt be 16.86 mg/lt is further eligible to flow into water bodies (rivers).  The texture of the soil conditions in the local area is clay, then structural stabilization pond construction recommended  using reinforced concrete plate. Keywords: Leachate, BOD, Sstabilization Pond, Detention Time, Capacity Pond
Evaluasi Kinerja Saluran Primer Pada Jaringan Irigasi Bendung Argoguruh Wilayah Adipuro Tegineneng Lampung Tengah Yuni Laras Setyawati; Iskandar Zulkarnain; I Gde Darmaputra
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 3 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i3.837

Abstract

The primary channel of Argoguruh  located in Central Lampung regency. Argoguruh weir has two primary channels which is named  by Kanal One  and Kanal Two.  The decreasing performance and damage occurs with increasing age of the building. The purpose of study is to determine the performance of the primary channel Kanal One on Argoguruh weir irrigation network. Total length of the Cannal One on this study is about 9 km, which is measured from intake to distribution box on channel segmen KH2.  The method of research is conducted by direct observation in the field with determine the velocity, the dimensions of the existing primary channel and sedimentation volume. The secondary data like as the channel dimensions, discharge plans, schemes of irrigation networks, rainfall data, and climatology were collected to support for hydrologic analyst. The rainfall data and climatological data are used to calculate the water needed for irrigation , than the value of the water needed is used to calculate water discharge plan that will be used as a comparison to the existing discharge channel. The results of this study showed the water discharge in existing channel of 32.17 m3/s was able to drain the water in accordance with the discharge plan for 31.64m3/sec. The volume of sediment in the primary channel as 49344.55m3, the potential for sediment deposition during the year amounted to   471.62mm /yr, loss of water in the channel is about 0.12% and the efficiencies of primary channels is about  99.88%.Keywords: performance evaluation, primary channel, Argoguruh,
Identifikasi Wilayah Rawan Banjir Kota Bandar Lampung Dengan Aplikasi Sistem Informasi Geografis (SIG) Didik Kuswadi; Iskandar Zulkarnain; Suprapto Suprapto
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 1 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i1.840

Abstract

Development and deforesting were quite in many parts of Indonesia. Change of function become impervious land caused an imbalance of hydrology and watershed conditions. The objective  of this research were (1) to determined the class of a flood- prone of Bandar Lampung City, (2) to made a map of flood- prone of  Bandar Lampung City. Based on the research, it can be some results: (1) The class interval of flood- prone is 100; (2) Flood- prone  levels of Bandar Lampung District is divided into five classes, namely: very low, low, medium, high, very high; (3) The domination of flood- prone area of Bandar Lampung City was medium, the areas of this is 104.74 km2 (57.28%); (4) The highest potential flood- prone was Western Telukbetung sub districkt, that they had the condition were the slope is flat, soil type was inceptisols, height of land was 0.0 to 12.5m from sea water level, and rainfall was high. Keywords: identification, flood-prone, geographical information system
Rancang Bangun Alat Penjernih Air Berbasis Masyarakat Pedesaan dengan Konsep Rucef (Re Use, Cheap, Easy And Flexible) Iskandar Zulkarnain; Ismadi Raharjo; Kelik Istanto
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 5 No 3 (2013)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v5i3.850

Abstract

These the water purification tools are designed based on household needs that carrying the concept RUCEP (Re Use, Cheap, Easy and Flexible). The purpose of this research were: 1). Designing a simple water purification technology which is inexpensive, and easy to applied for rural communities in terms of producing clean water; 2). Determining  the values changes of physical parameter which includes the TDS values, turbidity values and pH value, 3). Determining the value changes of bacteriological parameter such as content of Ecoli bacteria in water and total number of colieform. Based on the research, an average outlet discharge  that produces water with clean visual quality is 1.964 liters/hour with a contact time of 1 hour 8 minutes. The measurement of TDS parameters showed that results for 6 hours, average of the TDS value is 154.33 ppm which is increased on average 17.81%  from the initial TDS value 131 ppm. The result of turbidity measurements showed that for 6 hours, average turbidity value is 8.388 NTU which is improved on average 87.60% from the initial turbidity value about 67.67 NTU. The measurement of pH paramater showed the results that for 6 hours, average of pH is 7.85 which decreased from the initial pH of the raw water at 8.24. While the average temperature of the water from filtration is still relatively the same as the raw water is 27.18oC. The measurement of the   E-Colie bacteria contents in samples of raw water and water filtration showed negative results for E-Colie bacteria contents, but the total of coliforms decreased from 14 mpn to 9.2 mpn or decreased about 34.286%. Keywords: technology, water purification, rural clean water
Pengaruh Curah Hujan terhadap Kualitas Air Sungai Way Kuripan sebagai Sumber Air Baku Perusahaan Daerah Air Minum (PDAM) Way Rilau Ismadi Raharjo; Iskandar Zulkarnain; Suprapto Suprapto
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 5 No 2 (2013)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v5i2.894

Abstract

So far almost 30%  people need clean water of urban city in Bandar Lampung supplied by PDAM Way Rilau. There are about 12 sources of raw water consisting of surface water , ground water, and springs are treated by PDAM Way Rilau. One source  of raw water is surface water from Way Kuripan processed in "Water Treament Plant (WTP I and WTP II). Therefore,as a surface water, the source of raw water from Way Kuripan is always influenced by external conditions, especially rainfall this study was conducted in early 2013 to take on secondary data consisting of raw water quality parameters: turbidity, degree of acidity (pH), total hardness , dissolved content of Cl, SO 4, KMnO 4, Ca, and Mg are derived from the "PDAM Raw Water analysis Report" for the year 2012; While rainfall data taken from Lampung State Polytechnic Climatology Station which includes parameters: Number of Monthly rainfall , Number of Days Rain, and Rain Maximum every month. Raw water quality parameters of river Way Kuripan highly influenced by rainfall is turbidity, in addition to the content of sulfate and dissolved clorida. In the year 2012 recorded the highest raw water turbidity of 79.1 NTU in December with the condition number of monthly rainfall 354.2 mm, 22 days rainfall, and the maximum daily rainfall of 57.0 mm. However, all of the raw water parameters recorded in the year 2012 is still below the threshold of water-based Group B Regulation  in PP No 82 Tahun  2001.  Because of the quality of raw water from the Way Kuripan strongly influenced by rainfall, especially for turbidity parameters, it is necessary to increase the dose of coagulant is more during the rainy season from December to April. Keywords: raw water, rainfall, water quality, turbidity
Solar Power Elektrokoagulasi dengan Sistem Aliran Menerus untuk Pengolahan Air Baku Iskandar Zulkarnain
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 11 No 3 (2019)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v11i3.1469

Abstract

Electrocoagulation is the process of clumping and deposition of fine particles that dissolve in water without chemicals used. This process is the best alternative for removing turbidity in processing raw water because the treated water leaves no residue of sufat and chloride. Several studies have been conducted related to the use of the best electrodes, distance and number of electrodes and contact time. The objective of this research to design a solar power electrocoagulation device with a continuous system to be applied in the raw water treatment process on a laboratory scale by observing turbidity, TSS and pH. Keywords: electrocoagulation, raw water, turbidity.
Evaluasi Dimensi Box Culvert pada Saluran Drainase Jalan Arteri Soekarno Hatta (Studi Kasus: Ruas Untung Surapati- Hajimena) Aniessa Rinny Asnaning; Iskandar Zulkarnain
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 12 No 1 (2020)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v12i1.1674

Abstract

Flow system engineering using box culvert had done in arterial road Soekarno Hatta section Untung Surapati-Hajimena, precisely on the Way Kandis river channel. As population growth, on the box culvert’s upstream, had frequently been flooding when it rains with high intensity. It could predict that run off discharge was increased as an impact increasing runoff coefficient due to the growth of the built area in its upstream. It indicated that the box culvert dimension is not suitable to serve runoff discharge. Therefore the evaluation is needed to assess whether the dimension of box culvert was still capable of serving the flowing runoff discharge. The existing box culvert dimension could not serve the runoff discharge in 10, 20, and 25 year return periods are 10.13 m3/s, 11.07 m3/s, dan 11,37 m3/s.It was recommended to use precast concrete (n = 0.03)and 0.015 in slope.The evaluation shown that to serve runoff discharge in 10, 20, and 25 year return period, minimum needed box culvert with dimensions are 1.9 x 1.9 (m), 2.0 x 2.0 (m), and 2.0 x 2.0 (m). Refer to it, then recommended the dimension of box culvert is 2.0 x 2.0 m. It could install more than one with an adjustment dimension if the slope were difficult to reach in the recommended dimension Keywords: river, flood, discharge, box culvert.
Modifikasi Solar Water Destiler Dengan Menambahkan Unit Pemanas Berenergi Solar Cell Iskandar Zulkarnain; Kelik Istanto
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 12 No 2 (2020)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v12i2.1909

Abstract

Increasing the heat energy in the evaporator box from the Water Solar Destiler, by adding a wire heater aims to increase the heat energy in the evaporator box so that it will speed up the evaporation process in the evaporator box. The more liquid that is broken down due to heat energy into water vapor, the more discharge will be produced. Based on the results of the observations made, the addition of a wire heater in the evaporator city with AC electricity generated by solar panels, increased the purified water by 248.78%, from 1745 ml to 4341 ml, with the thickness of the water being purified as thick as 1 cm which was dried in the sun. for 10 hours starting from 07.00 WIB to 17.00 WIB.
Co-Authors Andy Eka Saputra Aniessa Rinny Asnaning Didik Kuswadi I Gde Darmaputra Ismadi Raharjo Kelik Istanto Kelik Istanto Oktaf Rina Shinta - wati Suprapto Suprapto Yatim R Widodo Yuni Laras Setyawati Zainal Arifin