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All Journal Jurnal Penelitian Pertanian Terapan Jurnal Ilmiah Inovasi Jurnal Abdi Insani TEKTAN Teknika Sains : Jurnal Ilmu Teknik Indonesian Journal of Environment and Sustainability Issues
Kuswadi, Didik
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
Modifikasi Pengepingan Skema Leap Frog dalam Penentuan Karakteristik Profil Aliran Sungai dalam Mendukung Pemetaan Wilayah Banjir (Penelitian Awal) Andy Eka Saputra; Didik Kuswadi
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.v5i3.811

Abstract

In this study carried out by modifying the method LeapFrog split with The split the regulator equation St. Venant 1 dimensions. The factors used are data stream land cover and slope/contour. Rain put a lateral discharge equation while the discharge from upstream continuity included as a boundary condition on the grid points of the river. The final goal in future studies to produce an split which can be used to determine the flow profile characteristics of a river, so as to support the handling of flooding in the area desired nonstructure From the results of research conducted a few things that can be described Modifications made split Leap Frog has been successfully split the continuity equation and momentum with the results split. The split results for the continuity equation The split above results in the early stages this research in trying to in Microsoft Fortran programs running on 6.5 and at this early study tested a simple case of the trapezoidal cross section of the river as well as data supporting data retrieved from the data Sekampung river as an example the case for programs to run and found that the results are already responding injection split discharge Q Nakayasu Sekampung well with characteristic output the shape of the profile of the river flow and results split with Microsoft Fortran 6.5 program that is in use is generally obtained water discharge (Q) outputs the same program with a discharge Q Nakayasu with repeated time 50 years of segment 0 m at the river until 21 hour simulation model has the same result as shown in Table 4 (table discharge results of running the program), so that the program is appropriate and can be running on the characteristics of the next river.Keywords: leap frog, st venant, flood modelling, lateral discharge, boundary conditions, nakayasu
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
Kajian Hidrolis Rencana Tanggul Pengendali Banjir Sungai Batanghari Kecamatan Bungur Kabupaten Lampung Timur Bagas Arya Hermuda; Didik Kuswadi; Andy Eka Saputra
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.v6i3.854

Abstract

Hydraulic embankment design done to solved flooding problems that it caused by damage  the catchment area, sedimentation, and the capacity of the river was not able to cover the stream during a peak discharge. The purpose of this research were (1) determined the flood discharge design, and (2) made hydraulic embankment design. Steps of research activities were the preparation, survey and topographical measurements, collected hydrological data,  processed of topography and hydrology data, counted the design maximum discharge, designed embankment river. The results showed that (1) the existing discharge was 479,745 m3/s, (2) the result of hydraulic design of Batanghari River embankment were the design discharge of  return period 50 years was 938,339 m³/s, the base width of the channel (b) by 35,5 m, the depth of flow (h) by 6,5 m, the slope embankment (1:m) by 1:1, height of freeboard by 1.0 m, wide embankment by 4,0m. Keywords: hydraulic embankment design, the river, flooding, the discharge
Evaluasi Degradasi Lahan Berdasarkan Identifikasi Perilaku Sungai dengan Pendekatan Geospasial di Sub Daerah Aliran Sungai Way Kandis Didik Kuswadi
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 7 No 1 (2015)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v7i1.873

Abstract

Population growth, utilization of natural resources and the increasingly development will be influence on environmental changes such as environmental degradation, and resource. Land use patterns in a watershed was not accordanced with the rules of spatial planning can cause a variety of problems such as the formation of critical land and pollution. Based on administrative areas, Way Kandis subwatershed covered sub district Kemiling, Rajabasa, Tanjung Senang, Natar and Jati Agung. The objectives of this research were (1) to analyze of landuse changes in Way Kandis subwatershed, and (2) to analysed the impact of landuse changes on the water quality changes at Way Kandis River. Steps of this research were: (i) gathered information and data, (ii) analysed of land use Way Kandis subwatershed, (iii)  observated of physical and chemical water quality Way Kandis River (iv) analysed of the impact landuse on water quality changes Way Kandis River. Based on the research, it can be some results: (i) Way Kandis Sub-Watershed covered an area of 17,320 ha; (ii) Landuse of Way Kandis Sub Watershed covered an area of 2,325 ha of plantations (13,42%), dryland farming an area of 11,227 ha (64,82%), settlements an area of 1,524 ha (8,80%), savanna an area of 536 ha (3,09%), open land an area of 1,130 ha (6,52%), shrubs an area of 31 ha (0,18%) and unidentified land an area of 547 ha (3,16%); (iii) The average of the DO value was 1.34-2.00 ppm. It  indicated that the water of Way Kandis river included the category of Class IV with the provisions of the agricultural sector; (iv) The average of the COD value was 48-128 ppm. It showed that the water of the Way Kandis river included in the category of Class IV with the provisions of the agricultural sector; (v) The average TSS value was 123-421 ppm. It showed that the water of the Way Kandis river included in the category of Class III and IV with the provisions of the fisheries and agriculture, except the average TSS value in Rajabasa Village. Keywords: evaluation of the land degradation, river behavior, geospatial
Identifikasi Tingkat Pencemaran Air Permukaan di Sub Daerah Aliran Sungai (DAS) Way Kandis Hulu Diano Hadi Putra; Gisnia Amaliyah; Siti Kholofah; Didik Kuswadi
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 7 No 2 (2015)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v7i2.882

Abstract

Generally, pollution in the waters is indicated with the presence of oxygen in the water or dissolved oxygen condition. To determine status of oxygen in the water as water pollution level  necessary to measure the COD (Chemical Oxygen Demand), TSS (Total Suspended Solid), TDS (Total Dissolve Solid) and turbidity (turbidity) as parameters of river water pollution. The purpose of this study is (1) to analyze the water quality of the sub watershed upstream Way Kandis, (2) make a map of the level of contamination of surface water in Sub Watershed (DAS) upstream Way Kandis. Stages of research include (i) gathering information and data, (ii) analysis of land use in sub watershed upstream Way Kandis, (iii) the analysis of water quality of upstream Way Kandis (iv) making maps contamination levels upstream Way Kandis, (v) the analysis of the level of River pollution Way Kandis. The results of this research, namely: (1) upstream Way Kandis watershed covering an area of 4603.76 hectares which includes the city of Bandar Lampung Territory and South Lampung regency and spread over four districts, namely Kemiling, Rajabasa, Natar and Jatiagung, (2) Usage land upstream Kandis Way watershed includes residential area of 3285.71 ha (71.37%), plantations covering an area of 429.52 ha (9.33%), a mixture of agricultural land area of 627.19 ha (13.62%), and poor land identified as the source map cloud-covered area of 118.98 ha (2.59%), (3) The level of water pollution in the upstream Way Kandis watershed divided into five zones, namely zones not polluted, slightly polluted zone, the critical zone polluted, heavily polluted and heavily polluted, (4) the highest COD pollution level in the class Very polluted covering an area of 2250.98 hectares or 48.79% of the total upstream Way Kandis watershed with area zoning highest form of residential areas in the amount of 1877.85 ha. (5) The highest pollution level in the class TSS Somewhat Polluted covering an area of 2635.85 hectares or 57.25% of the total upstream Way Kandis watershed with area zoning highest form of residential areas in the amount of 2148.06 hectares, (6) No TDS contamination occurred across the study area upstream Way Kandis watershed because of all extents of land cover (4603.76 ha) included in the category Not contaminated, (7) the level of Turbidity pollution occurs only in the category of pollution class Not contaminated covering an area of 3348.15 ha or 61.54% of the total upstream Way Kandis watershed with area zoning highest form of residential areas in the amount of 2398.45 H and Somewhat Polluted covering an area of 1255.61 ha or 38.46% of the total upstream Way Kandis watershed The highest area of zoning in the form of a residential area in the amount of 887.26 Ha. Keywords: identification, pollution, water surface, upstream, Way Kandis watershedGenerally, pollution in the waters is indicated with the presence of oxygen in the water or dissolved oxygen condition. To determine status of oxygen in the water as water pollution level  necessary to measure the COD (Chemical Oxygen Demand), TSS (Total Suspended Solid), TDS (Total Dissolve Solid) and turbidity (turbidity) as parameters of river water pollution. The purpose of this study is (1) to analyze the water quality of the sub watershed upstream Way Kandis, (2) make a map of the level of contamination of surface water in Sub Watershed (DAS) upstream Way Kandis. Stages of research include (i) gathering information and data, (ii) analysis of land use in sub watershed upstream Way Kandis, (iii) the analysis of water quality of upstream Way Kandis (iv) making maps contamination levels upstream Way Kandis, (v) the analysis of the level of River pollution Way Kandis. The results of this research, namely: (1) upstream Way Kandis watershed covering an area of 4603.76 hectares which includes the city of Bandar Lampung Territory and South Lampung regency and spread over four districts, namely Kemiling, Rajabasa, Natar and Jatiagung, (2) Usage land upstream Kandis Way watershed includes residential area of 3285.71 ha (71.37%), plantations covering an area of 429.52 ha (9.33%), a mixture of agricultural land area of 627.19 ha (13.62%), and poor land identified as the source map cloud-covered area of 118.98 ha (2.59%), (3) The level of water pollution in the upstream Way Kandis watershed divided into five zones, namely zones not polluted, slightly polluted zone, the critical zone polluted, heavily polluted and heavily polluted, (4) the highest COD pollution level in the class Very polluted covering an area of 2250.98 hectares or 48.79% of the total upstream Way Kandis watershed with area zoning highest form of residential areas in the amount of 1877.85 ha. (5) The highest pollution level in the class TSS Somewhat Polluted covering an area of 2635.85 hectares or 57.25% of the total upstream Way Kandis watershed with area zoning highest form of residential areas in the amount of 2148.06 hectares, (6) No TDS contamination occurred across the study area upstream Way Kandis watershed because of all extents of land cover (4603.76 ha) included in the category Not contaminated, (7) the level of Turbidity pollution occurs only in the category of pollution class Not contaminated covering an area of 3348.15 ha or 61.54% of the total upstream Way Kandis watershed with area zoning highest form of residential areas in the amount of 2398.45 H and Somewhat Polluted covering an area of 1255.61 ha or 38.46% of the total upstream Way Kandis watershed The highest area of zoning in the form of a residential area in the amount of 887.26 Ha. Keywords: identification, pollution, water surface, upstream, Way Kandis watershed
Hydraulic Design of Way Kandis River Embankment (Case Studies at the Lampung State Polytechnic River Section) Bagas Arya Hermuda; Gunawan Manihuruk; Realis Prasetyawan; Didik Kuswadi
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.v6i2.889

Abstract

Flooding is a condition where there is overload of water in the channel or inhibition of water flow to the drainage channel, so the overflow of water inundated the surround area. Embankment is defined as a waterwork which it was used to reduced or prevented the overtoping of water. The purpose of this study were (1) determine the plan flooding discharge of Way Kandis river, (2) made the hydraulic design of Way Kandis River embankment segment Polinela. Steps of research activities were the preparation, survey and topographical measurements, collected hydrological data,  processed of topography and hydrology data, counted the design maximum discharge, design of embankment river. The results showed that (1) the design discharge of  return period 25 years was 29.13 m³/s, (2) the result of hydraulic design of Way Kandis River embankment at the POLINELA segment were the design channel capacity by 30.18 m3/s, the base width of the channel (b) by 5.1 m, the depth of flow (h) by 1.7 m, the slope embankment (1:m) by 1:2, height of freeboard by 0.5 m. Keywords: hidraulic design of embankment,  plan of  flooding discharge, design of channel capacity
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 
Deteksi Akuifer Air Tanah Menggunakan Metode Geolistrik (Studi Kasus di Politeknik Negeri Lampung) Didik Kuswadi
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.v11i3.1465

Abstract

In fact, the interpretation of groundwater potential is not as easy as it is predicted, even often quite difficult and requires elaborate equipment. This remembers the formation and movement of groundwater in nature, so that measurements cannot be carried out directly. Interpretation of groundwater potential will always include two main objectives, namely: (1) soils or rocks as a medium where groundwater is acquired, and (2) groundwater as a liquid that fills the cavity in the soil or rocks. Some ground level investigation methods that can be done, including: Geological method, Gravity method, Magnetic field method, seismic method, and Geoelectric method. From these methods, the Geoelectric method is a very widely used method and the result is quite good. These geoelectric estimates are intended to obtain an overview of the subsurface of the soil and the possibility of groundwater and minerals at a certain depth. These geoelectric estimates are based on the fact that different materials will have different types of prisoners when they are electrically flowing. Groundwater has a lower type of prisoner than mineral rocks. The objectives of the study are: (1) Identifying soil layer formations and precise drilling depth at points of observation, (2) creating a map of groundwater layer depth distribution (groundwater contour). The stages of this study, namely: (1) equipment preparation, (2) The conjectives of the type of prisoner geoelectric with Schlumberger configuration, (3) The collection of field data, (4) Analysis and interpretation of field  data. Based on the results of analysis and discussion, can be concluded several things, namely: (i) water carrying layer in location I (TG-01) is suspected to be found in the TUFA layer of Andesit with a depth of 25-61 meters and a layer of andesite Breksi with a depth of more than 61-100.0 meters, (ii) flow of water through intergrain space and cracks/gaps with the potential of small water/until moderate.
Kombinasi Proses Presipitasi dan Adsorpsi untuk Menangani Limbah Bahan Berbahaya Beracun (B3) Hasil Kegiatan Analisis di Laboratorium Analisis Polinela Ismadi Raharjo; Didik Kuswadi
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.v12i2.1896

Abstract

The objectives of this research to determine the combination of the process of precipitation and adsorption in reducing the content of pollutant metals in the hazardous waste category B3 (hazardous toxic substances) produced at the Polinela Analysis Laboratory. The study was conducted in May to November 2019. The results obtained from 3 (three) times of sampling in May 2019 obtained a description of the characteristics of heavy metal content in wastewater in the form of Aluminum (Al) an average of 1.59 ppm, iron content ( Fe) an average of 9.73 ppm and Cadmium (Cd) an average of 0.022 ppm. From these results it can be seen that the wastewater containing Al and Fe has passed the threshold quality standard of waste water that is allowed to be discharged into water resource (PP No.82 of 2001), while the Cd content is still below the threshold. Furthermore, through the precipitation process with Ca (OH)2 0.8 M and adsorption using activated charcoal with contact time of 3 (three) hours the content of pollutants in wastewater can be reduced to 0.92 ppm for Al metals and 0.1 ppm for metals Fe, so that it is below the standard quality of waste water that is allowed to drain in water. Keywords: adsorption, precipitation, quality standard
Co-Authors Andre Velthuzend Andy Eka Saputra Bagas Arya Hermuda Bustanul Arifin Darmaputra, I Gde Darmaputra, I Gde Diano Hadi Putra Evline Aunike Pasaribu Fembriarti Erry Prasmatiwi Fitriani Gisnia Amaliyah Gunawan Manihuruk I Gde Darmaputra Idrus, Muhamad Ismadi Raharjo Ismadi Raharjo, Ismadi Jakty Kusuma Kelik Istanto Lestari, Dyah Aring Hepiana Muhamad Idrus Muhammad Idrus Muhammad Tahir Niko Suhendra Nila Akhmila Rizka Nurwijayanti Phelia, Arlina Putri, Vera Chania Realis Prasetyawan Sekar Dwi Rizki Siti Kholofah Suprapto Suprapto Suprapto Suprapto Sutarni Sutarni Tiorida Mantanari Velthuzend, Andre Wiwik Indrawati Yundari, Yundari