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Penggunaan Analisis Dimensi untuk Mencari Korelasi Antar Variabel pada Uji Model Hidrolik Atmojo, Pranoto Samto; Sachro, Sri Sangkawati; Budieny, Hary
Jurnal Teknik Sipil Vol 21, No 3 (2014)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.522 KB)

Abstrak. Dalam penelitian pemodelan, perumusan korelasi antara satu variabel dengan kelompok variabel lain dapat diselesaikan dengan analisis dimensi atau statistik. Analisis dimensi dalam hal tertentu akan lebih mudah dan relatif cepat untuk mengetahui hasilnya. Ada beberapa metode analisis dimensi yang sering digunakan, antara lain Metode Buckingham, Indicial, dan matrix. Tulisan berikut akan menggunakan analisis dimensi metoda Buckinghamâs untuk menentukan korelasi konsentrasi sedimen yang tergerus (C) dan kelompok variabel lain (Hw, g, Ïw, Qw, Hs, ds, Ïs , v) pada model penggelontoran sedimen. Berikutnya akan dapat diketahui korelasi konsentrasi sedimen maksimum hasil penggelontoran terhadap tinggi muka air hulu pada setiap tebal sedimen (d) yang telah mengendap.Pemodelan dengan skala 1:66,67, menggunakan sedimen tiruan serbuk batubara. Tebal sedimen yang mengendap diasumsikan 1,5; 2,25; 3,00; 3,75; 4,50 cm. Pengukuran konsentrasi yang tergelontor pada saat setiap muka air turun 1,50 cm dari tinggi muka air awal 13,90 cm. Hasil analisis didapat korelasi: C / Ï s = Æ( Qw.v / H3 w . É¡), dan konsentrasi sedimen maksimum hasil penggelontoran setiap tebal endapan didapat pada ketinggian muka air : Hw = 10,58 Hs-0,12HwAbstract. In the modeling research, the correlation formulation between one variable to a group of other variables can be solved by dimensional analysis or statistics. Dimensional analysis would be easy and relatively quick to obtain results in the certain cases. There are several methods of analysis dimensions that are often used, among other methods are Buckinghamâs, Indicial, and matrix. The following article will use the dimensional analysis Buckinghamâs method to determine the correlation of flushed sediment concentration (C) and a group of other variables (HW , g , Ïw , QW , Hs , ds , Ïs , v) in the flushed sediment modeling. The next step its will be known correlation maximum concentration of sediment flushed results against upstream water level at each sediment thickness (d) which has been deposited. Modeling scale of 1 : 66.67, use sediment artificial with coal dust. The thickness of sediment that settles at the assumed 1.5 ; 2.25 ; 3.00 ; 3.75 ; 4.50 cm. The flushed sediment concentration measurements were conducted during the upstream water level every drop of 1.50 cm, from the initial water level 13.90 cm. The results of the analysis correlation can be obtained : C / Ï s = Æ( Qw.v / H3 w . É¡), and the maximum concentration of flushed every sediment thickness can be obtained at water level : Hw = 10,58 Hs-0,12Hw

Aplikasi Penginderaan Jauh dan EPA-SWMM untuk Simulasi Debit Banjir Akibat Perubahan Lahan Sub DAS Banjaran Ariwibowo, Mohammad Lutfi; Suripin, S; Atmojo, Pranoto Samto
TEKNIK Vol 38, No 2 (2017): (Desember 2017)
Publisher : Diponegoro University

TatagunaÂ lahanÂ diÂ SubÂ DaerahÂ AliranÂ SungaiÂ (DAS)Â BanjaranÂ telah mengalami perubahan yang cukup tinggi selamaÂ kurunÂ waktuÂ 1995Â sampaiÂ 2001. Lahan sawah berkurang 1.759,28 hektar menjadi 1.603,97 hektar, tegalan berkurangÂ 289,54 hektar menjadi 283,32 hektar dan permukiman bertambah 1.284,36Â hektar menjadi 1.445,88 hektar. Alih fungsi lahan ini mengakibatkan banjir sering terjadi. Beberapa kali Sungai Banjaran meluap menyebabkan banjir di permukiman dan ruas jalan. Kajian pengaruh perubahan lahan terhadap debit banjir perlu dilakukan sehingga peningkatan debit banjir dapat dikendalikan.Tujuan penelitian ini menganalisis debit banjir secara periodik sesuai dengan perubahan tata guna lahan yang terjadi berdasarkan data hidrologi dan parameter DAS. Perhitungan debit banjir dilakukan dengan kalibrasi Environmental Protection Agency â€“ Storm Water Management Model( EPA-SWMM), yaitu metode Hidrograf Observasi (debit terukur) yangÂ dikalibrasi dengan metode Nash. Analisis perubahan lahan menggunakan peta tataguna lahan tahun 2005, Citra Satelit Quick Bird tahun 2010 dan 2014 yang berbasis Geography Information System (GIS). Penggunaan citra satelit resolusi tinggi Quick BirdÂ memenuhi ketepatan dalam menentukan daerah impervious dan pervious sertamorfometri DAS sebagai parameter utama dalam input EPA-SWMM. Model yang telah terkalibrasi digunakan untuk simulasi debit rencanaÂ sampai periode ulangÂ 50Â tahun.PerubahanÂ lahanÂ selama tahunÂ 2005-2014Â permukiman meningkat sebesar 10,98 ha (2,39 %), luas hutan menurun 1,67 ha (0,07%), telah mengakibatkan kenaikan debit banjir Q2Â sampai Q50Â tahun. Besarnya debit dan kenaikannya berturut-turut sebagai berikut : Q2Â tahun sebesar 3,08 m3/dtk (2,16 %), Q5 tahun sebesar 3,5 m3/dtk (1,87 %), Q10 tahun sebesar 3,72 m3/dtk (1,7 %), Q25 tahun sebesar 3,94 m3/dtk (1,60 %) dan Q50 tahun sebesar 4,13 m3/dtk (1,50 %).Â Volume banjir terjadi peningkatan yakni: Q2 tahun sebesar 0,57 % (10. 106 ) liter, Q5 tahun sebesar 0,45 % (12.106 ) liter, Q10 tahun sebesar 0,42 % (13. 106) liter, Q25 tahun sebesar 0,33 % (12.106) liter dan Q50 tahun sebesar 0,35 % (14.106) liter. Usaha pengendalian banjir pada periode ulang 50 tahun (Q50) yang disimulasikan mampu menurunkan debit banjir antara lain : penegakkan hukumÂ sebesar 14,43 m3/dtk (5 %), embung sebesar 20,9 m3/dtkÂ (7,1 %) dan sumur resapan sebesar 31,18 m3/dtk (10,73 %). Skenario RTRW sebesar 26,3 m3/dtk (9,05 %), kombinasi sumur resapan dan penegakan hukum sebesar 45,92 m3/dtk (15,81 %) dan kombinasi embung dan penegakan hukum sebesar 40,58 m3/dtk (13,97 %). Dari hasil simulasi diperoleh pembuatan sumur resapan, kombinasi sumur resapan dan penegakan hukum, kombinasi embung dan penegakan hukum mampu menurunkan debit banjir sampai pada Q25

Unjuk Kerja Waduk Jatigede Cholifatul Afifah, Risdiana; Samto Atmodjo, Pranoto; Sangkawati, Sri
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 21, Nomor 2, DESEMBER 2015
Publisher : Department of Civil Engineering, Diponegoro University

Jatigede Reservoir located in Sumedang, West Java. As the second largest reservoir in Indonesia, the main purpose of the reservoir construction is to irrigate the 90.000 Ha of irrigation area, the source of 3,5 m3/s of raw and drinking water, as well as the source of water for hydropower plan Jatigede requiring water supply as much as 61,84 m3/s. One of the efforts that can be taken to optimize reservoir of water resources, particularly for irrigation water needs, is to do a simulation model of the Jatigede Reservoir operation. This study is discusses the analysis of the performance of the operating pattern Jatigede were analyzed based on the stochastic model of Cimanuk river flow and rain data of Cimanuk Water District. Data needs to be tested first to qualify for a normal statistical distribution using AProb software version 4.1. Stochastic models were analyzed with software SAMS 2007 from Colorado State University. Surgery simulation analysis to determine the performance of the reservoir using software Ribasim. To test the performance of reservoir used the criteria of reliability, resilience, and vulnerability. From the analysis of performance can be concluded that the reliability of the reservoir in an effort to meet the needs of raw water, irrigation, and hydropower at existing condition is of 98.3%, the resilience of the reservoir by 50%, and the vulnerability of dams throughout the simulation period amounted to 6824.70 m3/s , While in the next 50 years the condition of the dam by 92.7% reliability, resilience reservoir by 34%, and the vulnerability of dams throughout the simulation period amounted 20.540,51m3/s. It can be concluded that the performance ofÂ Jatigede reservoir decreased after the analysis of reservoir operation plan for the next 50 years.

Analisis Efektivitas Jalur Evakuasi Bencana Banjir Samto Atmodjo, Pranoto; Sangkawati, Sri; Bayu Setiaji, Arief
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 21, Nomor 1, JULI 2015
Publisher : Department of Civil Engineering, Diponegoro University

The flood disaster is one of the natural phenomena that are difficult to avoid. The risk of flood losses that occur in urban areas is generally greater than that occur in the countryside, which it is more due to the differences in the level of public welfare facilities and population density factors The increase in population and the high cost of residential land in urban areas, the greater the pressure of land use for settlement penetrated even in areas that have the potential to floodwaters. To avoid big losses due to flooding and loss of life, it is necessary to disaster management which includes the establishment of alternative evacuation routes, the storage location of refugee. This study will analyze and choose the path of evacuation of the population that are effective and safe as a result of flood-based Geographic Information System (GIS). Stages study began with an analysis of the magnitude of flooding, inundation extents, data collection and analysis of population, density and location of concentrations of residential quarters, global topography and the existing road network system. The study used a case in West Semarang Regency, with a fairly dense population and prone to flooding. Results of this study are expected to be applied to the area of research and can be used as a model for the evacuation of residents due to floods elsewhere.

Evaluasi dan Prediksi Pengelolaan Jaringan Air Bersih IKK Brangsong Kabupaten Kendal Berbasis Sistem Informasi Geografis dalam Rangka Mendukung Millenium Development Goals (MDGs) Atmojo, Pranoto Samto; Sangkawati, Sri
MEDIA KOMUNIKASI TEKNIK SIPIL Tahun 17, Nomor 1, PEBRUARI 2009
Publisher : Department of Civil Engineering, Diponegoro University

To support government program Millennium Development Goals ( MDGS) whereâ€™s in the year 2015 : 80% of residents must be able to served by supply of cleanness water systems, hence writer will do evaluate of management and distribution of network supporting Â facilities for cleanness water based on technology that is Â using GIS ( Geographical Information System). GIS can stored technical data of cleanness water network, and GIS Â in allying with hydraulic model of EPANET applicable to evaluate network existing and assists to predict possibility future Â expansion of network ( eg the year 2015). This evaluation covers mapping of STA pipe network with GPS, mapping of continuation with GIS, calculation of scenario prediction clean water required in the year 2015, and handling of network supporting facilities for clean water with simulation EPANET for network existing and extension of either in the year 2008 and also for the year 2015. This research be done based on the real field condition Â there are: Cleanness water supplies for public IKK Brangsong supported by 2 pumping Â well. Its Part of Â Sub-Province Kendal area - that PDAMâ€™s Â customer- no supplied Â by network especially at the peak hour time, and resent still have much Â region which has not been served clean water by PDAM ,so thatâ€™s need to extension network to supplied that area. Keywords: GPS, Â GIS, EPANETPermalink: http://ejournal.undip.ac.id/index.php/mkts/article/view/3417[How to cite: Atmojo, S.A. dan Sangkawati, S. (2009). Evaluasi dan Prediksi Pengelolaan Jaringan Air Bersih IKK Brangsong Kabupaten Kendal Berbasis Sistem Informasi Geografis dalam Rangka Mendukung Millenium Development Goals (MDGs), Jurnal Media Komunikasi Teknik Sipil, 17 (1): 98-109]

Optimasi Biaya dan Waktu dalam Penyusunan Jadwal Pelaksanaan Proyek (Studi Kasus Proyek Pembangunan Gedung Pusat Kegiatan Mahasiswa Universitas Diponegoro Semarang) Amat Pawiro, Dadiyono; Suharyanto, Suharyanto; Atmojo, Pranoto Samto
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 2, DESEMBER 2014
Publisher : Department of Civil Engineering, Diponegoro University

Execution of conctruction project executed to pass selected project management system from planning phase until operation phase. Unfavorable scheduling system can cause the project to be inefficient. Execution of a construction project often needs to accelerate the duration of the project. Every effort to expedite the implementation of the project in general will result in increased project costs. This provides the necessary conditions so that the business dilemma that the project can be completed with optimum cost and time. The intention and purpose of this research is to accelerate the execution time by using the method of CPM overtime, so we get the optimal time and cost. This research method by forming a linear equation of the trajectory of the crisis and then analyzed by linier program LINDO. The results on the building construction projects the PKM Universitas Diponegoro obtained optimum time of 133 days with a total cost of Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Rp. 6,252,074,822,-

Uji Kemampuan Bangunan Pengaman Mengurangi Longsoran pada Balas Rel akibat Banjir Atmojo, Pranoto Samto; Sachro, Sri Sangkawati; Budieny, Hary
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

Ballast rail has a vital fuction to support the trainâ€™s load and its dynamic forces. This load is then distributed to the subgrade layer through pile of gravel under the ballast. Most of the design about the gravel layer (ballast) doesnâ€™t take into account the effect of flood overflow on the rail, which is very likely to occur during rainy season. The Flood flows above the rail will reduce the ballast stability and then eroded. Part or most of the gravel were flushed out, thus resulting the ballast to be weak and may collapse, which is vey dangerous to the train traffic. Its therefore requires to investigate stability of the ballast under flood flow above the rail condition and any measure or improvement required by Hydraulic Modeling. The research is conducted at Hydraulic Laboratory, Diponegoro University. The model prototype is refer a tract rail at Mangkang-Semarang KM.12, with scale of 1:5. Its shown that the ballastÂ without a safety structure will start to scour when water level h1 = 15 cm , meanwhile with the structures Type 1 and Type 1 + 1 its start scour h1 = 17 and 19 cm respectively. The safety structure is able to scouring decrease , ie at the variation of h1 = 19 cm , there are 68.50 cm without structure, and with structure Type 1 and Type 2 areÂ 29 andÂ 26 cm respectively. This research shown that it needs to installing safety structure (sill) to reduce the danger cause of flood flow over the rail, especially at the flood prone area. The Management of train traffic could adopt this result how to protect of ballast scour cause of flood.

Pengaruh Penerapan Sistem Manajemen Mutu terhadap Kualitas Pelaksanaan Kegiatan Operasi dan Pemeliharaan (Studi Kasus: Tugas Pembantuan Operasi dan Pemeliharaan Daerah Irigasi Kedung Asem dan Daerah Irigasi Bodri Provinsi Jawa Tengah) Amin, Mualim; Wibowo, M. Agung; Atmojo, Pranoto Samto
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 1, JULI 2016
Publisher : Department of Civil Engineering, Diponegoro University

A decrease in irrigation network performance system operation and maintenance are the impact of the operation management system and irrigation maintenance which does not suitable with the technical demands of the irrigation network design. The purpose of this study is to determine the effect of the application of quality management system in ministry of public works to the quality of the operations and maintenance on the Tasks Operation and Maintenance. The object of the research was in Kedung Asem and Bodri Irrigation Area, it was seen from three variables, namely: (1) the management of resources, (2) the implementation of the activities, (3) measurement, analysis and improvement. Data were obtained from observation andquestionnaire, and then were processed by using descriptive method and linear regression method. The results says that the quality management system in resource management is perceived as good enough category; the implementation activities, measurement, analysis and improvement were perceived good by the respondents. Identification of the quality of the operations and maintenance were also perceived good; further, performance index ratings of irrigation systems are performing well. The results of multiple linear regression equation is Y =12.883+1,181X1+0,449X2 +1,210X3, the conclusions hypothesis testing shows that the implication of quality management system give positive and significant effect on improving the quality of operations and maintenance work on the Tasks Operation and Maintenance of (DI) Kedung Asem and (DI) Bodri Irrigation Area.

PERENCANAAN EMBUNG TAMBAKROMO UNTUK MEMENUHI KEBUTUHAN AIR BAKU Fahmi, Mushafa; Halim, Fandy; Atmojo, Pranoto Samto; Sriyana, Sriyana
Jurnal Karya Teknik Sipil Volume 2, Nomor 4, Tahun 2013
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (551.857 KB)

The increasing scarcity of water resources, there needs to be an effort that must be implemented to meet the needs of the water. One way PT. Indocement to meet the water requirement of 60 liters / second to harness the potential of Beku river with Tambakromo Embung development plan, in Wukirsari Village, District Tambakromo, Pati. Based on the mainstay discharge analysis by the method of FJ mock obtained the discharge of 120 liters / sec. For the body design of the small dam used the flood discharge hydrological data with HSS Gamma I method with flood discharge plan 1000 years return period amounted 116.92 m3/second. Tambakromo Small Dam capacity is 5,000,000 m3. Tambakromo Small Dam height is 20 meters, 7 meters wide summit reservoir, spillway width of 15 meters, spillway height is 2 meters. Estimated cost to build Tambakromo Small Dam amounted Rp.33.874.000.000, 00.

Penggunaan Analisis Dimensi untuk Mencari Korelasi Antar Variabel pada Uji Model Hidrolik Pranoto Samto Atmojo; Sri Sangkawati Sachro; Hary Budieny
Jurnal Teknik Sipil Vol 21 No 3 (2014)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2014.21.3.5

Abstrak. Dalam penelitian pemodelan, perumusan korelasi antara satu variabel dengan kelompok variabel lain dapat diselesaikan dengan analisis dimensi atau statistik. Analisis dimensi dalam hal tertentu akan lebih mudah dan relatif cepat untuk mengetahui hasilnya. Ada beberapa metode analisis dimensi yang sering digunakan, antara lain Metode Buckingham, Indicial, dan matrix. Tulisan berikut akan menggunakan analisis dimensi metoda Buckingham's untuk menentukan korelasi konsentrasi sedimen yang tergerus (C) dan kelompok variabel lain (Hw, g, Ïw, Qw, Hs, ds, Ïs , v) pada model penggelontoran sedimen. Berikutnya akan dapat diketahui korelasi konsentrasi sedimen maksimum hasil penggelontoran terhadap tinggi muka air hulu pada setiap tebal sedimen (d) yang telah mengendap.Pemodelan dengan skala 1:66,67, menggunakan sedimen tiruan serbuk batubara. Tebal sedimen yang mengendap diasumsikan 1,5; 2,25; 3,00; 3,75; 4,50 cm. Pengukuran konsentrasi yang tergelontor pada saat setiap muka air turun 1,50 cm dari tinggi muka air awal 13,90 cm. Hasil analisis didapat korelasi: C / Ï s = Æ’( Qw.v / H3 w . É¡), dan konsentrasi sedimen maksimum hasil penggelontoran setiap tebal endapan didapat pada ketinggian muka air : Hw = 10,58 Hs-0,12HwAbstract. In the modeling research, the correlation formulation between one variable to a group of other variables can be solved by dimensional analysis or statistics. Dimensional analysis would be easy and relatively quick to obtain results in the certain cases. There are several methods of analysis dimensions that are often used, among other methods are Buckingham's, Indicial, and matrix. The following article will use the dimensional analysis Buckingham's method to determine the correlation of flushed sediment concentration (C) and a group of other variables (HW , g , Ïw , QW , Hs , ds , Ïs , v) in the flushed sediment modeling. The next step its will be known correlation maximum concentration of sediment flushed results against upstream water level at each sediment thickness (d) which has been deposited. Modeling scale of 1 : 66.67, use sediment artificial with coal dust. The thickness of sediment that settles at the assumed 1.5 ; 2.25 ; 3.00 ; 3.75 ; 4.50 cm. The flushed sediment concentration measurements were conducted during the upstream water level every drop of 1.50 cm, from the initial water level 13.90 cm. The results of the analysis correlation can be obtained : C / Ï s = Æ’( Qw.v / H3 w . É¡), and the maximum concentration of flushed every sediment thickness can be obtained at water level : Hw = 10,58 Hs-0,12Hw

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