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Kelik Istanto
Politeknik Negeri Lampung
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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
Analisis Model Pondasi Bangunan Air di Atas Tanah Rawa Berbahan Lokal Kelik Istanto; Andy Eka Saputra
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.v5i3.846

Abstract

The research was distributed by foundation failure that supportted the waterworks on swamp soil which caused it collapsed. The objectives of this research were (1) Define foundation model on swamp soil using local material that suitable to swamp soil characteristic, (2) Generate foundation model that give efficiency value more than or equivalence to 70%, and, (3) Predict the bearing capacity of foundation model to support waterworks load. The proposed foundation models were pile group using gelam (melaleuca cajuputi sub sp.cumingiana) had 12 cm in diameter which plugged upright (M1), two-fifths in each row were plugged oblique with 15o to center line of waterworks (M2), and four-fifths in each row were plugged oblique with 15o to center line of waterworks (M3). Furthermore, it performed by computing the bearing capacity of each foundation model based on physical and mechanical properties of swamp soil in single pile, pile group, and block failure system. The research results shown that 40 cm in space between piles (Eg=70,3%), the foundation models produced the same bearing capacity to support waterworks load. Whereas, which 50 cm in space (Eg=76%), 60 cm (Eg=79,9%), and 70 cm (Eg=82,7%), each model produced different bearing capacity to support waterworks load and could describe by QM1<QM2<QM3. The maximum waterworks load could be supported by foundation model was 1,208.83 kg, it was happened in the third model with 70 cm in space. Keywords:  swamp soil, local material, pile group efficiency, and bearing capacity
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
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
Penggunaan Hidrolik Model Fisik Redesain Bendung Simongan Niko Suhendra; Didik Kuswadi; Kelik Istanto
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.v5i2.897

Abstract

Test model can provide a lot of possibilities of handling hydraulic problem as input for changes or improvements to the waterworks construction will be implemented. Therefore, physical modeling weir is the right step to knowing how to learn and cope with floods, good damage posed and a solution be handled. The purpose of this study was (1) Determine scale models and standard on many discharge meter prototype and (2) Perform the calibration test physical models contain. Implementation stages of this research started from the collection of data, software installation support, determination of scale models, model physical weir, the determination of the standard meter, test calibration model. Based on the results and discussion that have been described, it can be concluded with respect to the following: (1) Calculation of scale models produce mass-scale as follows: speed scale as large as 6,324; a 2.5 scale flow profile; and large scale Thomson 10119.289; (2) the completion of the process Curb Simongan done through physical modeling in the form of three-dimensional dam of five stages, namely Series 0, Series 1, Series 2, Series 3 and Series 4;(3) Calculation based on the Thomson High Level Discharge Meter  (m3/sec) prototype 200,500 m3/sec, m3/sec 700, and 850 consecutive m3/sec size of 37,445 cm, 45.522 cm, 49.314 cm and 51.746 cm; (4) The results of calibration test physical models of flow rate on debit Series 4 83 993 lt/sec indicates that the downstream flow velocity decreased after making 3 buildings that have elevation +3 m to the left and right downstream weir, elevation +4 m the middle of the downstream weir. Keywords: physical hidraulic model; redesign, weir simongan 
Simulasi Kejadian Banjir Sungai Way Kandis Ruas Polinela Untuk Beberapa Kala Ulang Kelik Istanto
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.v11i3.1470

Abstract

The effort to control water’s destructive power, in this case is flooding due to overflowing Kandis river, needs to be done to minimize the negative impacts. The main data in flood control infrastructure planning is discharge. The discharge calculation and simulation are required in some return periods. The objectives of research are delineate of catchment area, land cover of catchment area mapping, calculate of maksimum areal rainfall, calculate of flood discharge, and flood simulation of Kandis river in Polinela section base on flood. Kandis river catchment area of the Polinela section was 402.5 hectares and known that type of land cover consists of 15% open land, 20% vegetated land, 50% settlement, and 15% commercial area.The results shown that return period discharge in 2, 5, 10, 20, 25, 50, and 100 year are 9,89 m3/s, 11,81 m3/s, 13,07 m3/s, 14,29 m3/s, 14,68 m3/s, 15,86 m3/s, and 17,04 m3/s. By assuming there will be 1,5 % growth of settlements and commercial areas in catchment area land use as constantly number, 10 years forward, the return period discharge in 2, 5, 10, 20, 25, 50, and 100 year are 10,34 m3/s, 12,33 m3/s, 13,66 m3/s, 14,93 m3/s, 15,33 m3/s, 16,57 m3/s, and 17,80 m3/s. While by assuming there will be 3 % growth of settlements and 1 % growth of commercial areas in catchment area land use as constantly number, 10 years forward, the return period discharge in 2, 5, 10, 20, 25, 50, and 100 year are 10,58 m3/s, 12,63 m3/s, 13,99 m3/s, 15,29 m3/s, 15,70 m3/s, 16,97 m3/s, and 18,23 m3/s. Keywords :river, flood, discharge, flood simulation.
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 Didik Kuswadi Iskandar Zulkarnain Ismadi Raharjo Niko Suhendra Repinka Cornelia Suprapto Suprapto