Articles

KAJIAN METODE PELAKSANAAN SISTEM POLDER KALI BANGER Subandriyani, dwi; Nabil, Muchammad Lutfian; Suharyanto, Suharyanto; Nugroho, Hari
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

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Abstract

Banger river polder system which has 524 ha area is a part of Semarang Centre region drainage system. Banger river polder system is located in East Semarang region and North Semarang region. It is a crowded area with many problems. This area which has low level at soil supporting capacity is flooded by rob almost everytime. So it causes land subsidence every year. On the other hand, land use is another serious problem there with many houses cover the area without proper access road. Construction method evaluation of procurement and pump installation and retention pond and closer dike construction in Banger river polder system need to adapt more further with the real condition on site. Procurement and pump installation works will not be affected significantly by Banger river polder system site location. So that, in retension pond and closer dike works need a construction method which uses dewatering work, temporary dike construction, and determining the hauling route. These works combination produce an effective construction method, construction method using dewatering and bailey bridge. This construction method is a combination between dewatering work and the use of bailey bridge which is based on workability, reducing cycle time, and the economical one. This combination is the most effective, based on work influence indicators which reach 27,05%
KAJIAN PELELANGAN KONSTRUKSI BERDASARKAN KEPPRES 80/2003 DAN PERPRES 54/2010 (Studi Kasus : LPSE Universitas Diponegoro) Kuncoro, Wahyu; Wakhid, Nur; Wibowo, M. Agung; Nugroho, Hari
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 1, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

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Abstract

Construction sector has an important role in increasing economic growth. To create a condition that all necessary infrastructure that can guarantee an increase in economic activity. Procurement of facilities and infrastructure as well as the governments infrastructure, using the budget of income and expenditure (APBN/APBD). To supervise the use of budget, procurement regulations are arranged Keppres 80/2003 and amended by Perpres 54/2010. The tender process is expected to use electronic media (e-procurement) to be more transparent, accountable, effective and efficient, in line with efforts to eradicate corruption, collusion and nepotism. The method of research used descriptive research. The sampling technique used purposive sampling with data taken from Diponegoro University LPSE and questionnaires to the respondents as service providers, service users, and the auction committee. A descriptive analysis of data processing and data processing using a Likert scale questionnaire on the subject of the study variables.The results of comparative analysis based on the tender for the construction of Perpres 54/2010 is better than the Keppres 80/2003. In terms of the duration of the execution of the auction package is based on Perpres 54/2010 1.76 is faster, there was the time efficiency of 50%. The cost, Perpres 54/2010 is cheaper. In the case of list requirements, both rules have the same relative terms. In terms of accuracy in the selection of service providers in the Perpres 54/2010 be better. In terms of selection of participants is more stringent Perpres 54/2010 instead of Presidential Decree 80/2003. In terms of transparency in the determination of winners, that the new regulations more transparent. General opinion of the regulation services provider 54/2010 is better.
PERENCANAAN SISTEM JARINGAN TAMBAK GARAM DI PEMONGKONG KABUPATEN LOMBOK TIMUR Adiyoso, Rano; Darmawan, Ricky; Kadir, Abdul; Nugroho, Hari
JURNAL KARYA TEKNIK SIPIL Volume 3, Nomor 1, Tahun 2014
Publisher : Jurusan Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Jerowaru Pemongkong village district of East Lombok, West Nusa Tenggara is one of the salt producing areas. Water systems that do not meet the technical standards causing the low production of salt. In efforts to increase production and quality, a need to increase salt production system by using a standard technical planning. In this plan, the planning standards used are salt production system in Korea is the ratio of the reservoir : evaporation area : crystallization area = 55 : 30 : 15, a water supply system with pumping and other buildings such as intake planning, channel and floodgates that refer to the Technical Irrigation Planning Standards. At the beginning of the planning is done making salt ponds plot layout, plan continued with dimensions and elevation intake structure, reservoir, evaporation area, crystallization area and the channel of a water carrier, so that the water supply can be guaranteed. From the study sites were sampled an area of 10.79 ha, gained 5.39 ha of reservoir, 3.24 ha of evaporation area and 1.62 ha of crystallization area. According to the criteria of the salt pond water depth according to the Ministry of Marine Affairs and Fisheries of the Republic of Indonesia, the water level in the reservoir is 50 cm, the water level in evaporation area is 30 cm, and the water level in crystallization area is 5 cm. The discharge of primary channel is 0,526 m3/sec, obtained from the analysis of the primary channel dimensions B = 1.50 m,  H = 0.75 m, while the discharge of secondary channel is 0.213 m3/sec, obtained from the analysis of channel dimensions secondary B = 1.00 m, H = 0.50 m. Discharge plan on the culvert at 0.669 m3/sec, obtained from the analysis of the culvert dimensions 1.50 m x 1.50 m. To maintain water supply continuity water pumps were used with capacity of 98.57 liters/sec. By using this system is expected to increase the productivity of salt + 90 tons/ha/year to + 150 tons/ha/year. The cost of manufacture new salt ponds in this area ranges from + Rp . 165,000,000.00 / ha.
PERENCANAAN BENDUNG CIKAWUNG PADA DAERAH NON-CEKUNGAN AIR TANAH DI KABUPATEN CILACAP, JAWA TENGAH Herdiarti, Etika; Nisa, Shalli Malia; Kodoatie, Robert J.; Nugroho, Hari
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 1, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

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Abstract

Cikawung weir located at Cipari District in Cilacap Regency. Cikawung weir built on the Cikawung river with the catchment area is 121,12 km2. To satisfy irrigation needs in the area around the river of 1020.24 ha, it is necessary to discharge a sufficient pledge. Mainstay discharge calculated by modifying the method FJ Mock. Location Cikawung weir is at a non-groundwater basin covering an area of 98,90 km2 (81,65%) and others are in the area groundwater basin area of 22,22 km2 (18,35%). Both of these regions have different characteristics in generating mainstay discharge. In the ground, at the non-groundwater basin, water flows only in the layer of soil water zone, while in the area groundwater basin water is able to flow to groundwater zone layer. Availability of river water contained on the non - groundwater basin less than groundwater basin area. Cikawung weir flood discharge plan designed by 50-year return period of 425,29 m3 and 1,92 m3 for discharge decision. Cikawung weir is design with specification rounded type of crest with height of  5,5 m, USBR type III of stilling basin, equipped with sand trap, flushing way of sand trap, flushing gate, intake gate, and retaining wall. Cikawung weir construction cost about Rp. 6.911.600.000,00 and a plan of 28 weeks.
KAJIAN PELELANGAN KONSTRUKSI BERDASARKAN KEPPRES 80/2003 DAN PERPRES 54/2010 (Studi Kasus : LPSE Universitas Diponegoro) Wakhid, Nur; Kuncoro, Wahyu; Wibowo, M. Agung; Nugroho, Hari
JURNAL KARYA TEKNIK SIPIL Volume 2, Nomor 2, Tahun 2013
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

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Abstract

Construction sector has an important role in increasing economic growth. To create a condition that all necessary infrastructure that can guarantee an increase in economic activity. Procurement of facilities and infrastructure as well as the governments infrastructure, using the budget of income and expenditure (APBN/APBD). To supervise the use of budget, procurement regulations are arranged Keppres 80/2003 and amended by Perpres 54/2010. The tender process is expected to use electronic media (e-procurement) to be more transparent, accountable, effective and efficient, in line with efforts to eradicate corruption, collusion and nepotism. The method of research used descriptive research. The sampling technique used purposive sampling with data taken from Diponegoro University 2 LPSE and questionnaires to the respondents as service providers, service users, and the auction committee. A descriptive analysis of data processing and data processing using a Likert scale questionnaire on the subject of the study variables. The results of comparative analysis based on the tender for the construction of Perpres 54/2010 is better than the Keppres 80/2003.In terms of the duration of the execution of the auction package is based on Perpres 54/2010 1.76 is faster, there was the time efficiency of 50%. The cost, Perpres 54/2010 is cheaper. In the case of list requirements, both rules have the same relative terms. In terms of accuracy in the selection of service providers in the Perpres 54/2010 be better. In terms of selection of participants is more stringent Perpres 54/2010 instead of Presidential Decree 80/2003. In terms of transparency in the determination of winners, that the new regulations more transparent. General opinion of the regulation services provider 54/2010 is better.
SISTEM PERAMALAN BANJIR SECARA SPATIAL (STUDI KASUS PADA SUNGAI TUNTANG) Suharyanto, Suharyanto; Pranoto, Sumbogo; Nugroho, Hari; Parmantoro, Priyo Nugroho
KEAIRAN No.1 - Tahun 8 JULI 2001
Publisher : KEAIRAN

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Flooding is a natural disaster which can not be prevented totally, Some countermeasures to alleviate the flooding’s damaging effects have been implemented with some deggree of succes and some with limited succes (fail). These countermeasures include normalizing the river courses, increasing its embankment, providing revetment, or providing with flood control structures. However, these countermeasures are not the only action to reduce flooding damage. An equally important action contributing to the success on reducing flood damaged is non-technical measures especially system information on flooding characteristics This non-technical measure requiring flood forcasting procedures (software, equipments, information exhange, procedures, and coordination). When the time, the places, and the magnitudes of the incoming floods can be predicted with better confidence then the affected regions and people can prepared to anticipate well before the flood occurrence. This will definitelyreduce the possible flood damages. This paper presents the development of flood forecasting function in the Tuntang River, i.e., from Glapan weir to Gubug, and Buyaran bridges. Additioanlly, the flood forecasting functions along the river, i.e., at every potentially vulnerable embankments are also presented. These functions have also been calibrated by the floods occuring on 2001.
PERENCANAAN KONSERVASI SUB DAS CIMUNTUR KABUPATEN CIAMIS Romdhon, Ajeng Aprilia; Utomo, Kunto Dwi; Suharyanto, Suharyanto; Nugroho, Hari
JURNAL KARYA TEKNIK SIPIL Volume 3, Nomor 1, Tahun 2014
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

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Abstract

The land degradation of Cimuntur Sub Watershed that happened causing the function of sub watershed is changing as a basin. The indication of erosion and sedimentation was 88,55 ton/ha/yr and sediment yield was 0,91 mm/yr. Therefore it needs study to figure out how big is the erotion and sedimentatiom in Cimuntur Sub Watershed so that can get the solution for the problem which happened in Cimuntur Sub Watershed. Analizing of erotion and sedimentation in Cimuntur Watershed is used Universal Soil Loss Equation (USLE) Method and is helped with ArcGIS software. ArcGIS software is used to overlay datas. The input data which is needed for USLE Method is Rain Erosivity Factor (R), Soil Erodibility Factor (K), Slope Length Factor (LS), Land Use Factor (C), and Practical Conservation Factor (P). The result of data overlay by ArcGIS is erotion happened. From the analizing datas is gotten that erotion at Cimuntur Sub Watershed is 963,747 ton/ha/year and sediment yield is 14,649 ton/ha/year. And then making classification of erotion class. This erotion class is made to be used as the consideration base for defining the alternative solution will be done and determine location of erotion and sedimentation solution. The alternative erotion and sedimentation solution of Cimuntur Watershed is done by doing conservation such as vegetative conservation or mechanical conservation. Vegetative conservation can be done by improving the land use management. After doing vegetative conservation, erotion decreases to 237,415 ton/ha/yr and sediment yield 3,61 ton/ha/yr. Whereas mechanical conservation can be done by building a sediment contoller (check dam). Check dam construction is done at big erosion category that is Cirende River with capacity is 8945,95 m3.
PERENCANAAN DRAINASE WILAYAH BANYUMANIK SEMARANG Juanita, Cut Dede; Noordianto, Hafidz; Admojo, Pranoto Samto; Nugroho, Hari
JURNAL KARYA TEKNIK SIPIL Volume 3, Nomor 2, Tahun 2014
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

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Abstract

The flood problem and inundation local often occurring in regions banyumanik, precisely in the intersection of Jalan Durian Raya. A limited drainage channels plus garbage and sedimentation blockage makes the water cannot flow when it rains. This leads to a puddle by the depth of between 10 - 15 cm for 1 - 2 hours. Therefore planning drainage the environmental from can overcome flooding and inundation on jalan durian. In planning, hydrological analysis is performed to seek discharge plan with program HEC-HMS. Acquired discharge flood plan of 39,6 m3/s with repeated periods of 10 years. Then to find out the effectiveness of existing cross section, rivers and drainage channels are modelled with program HEC-RAS. Cross section is planned by condition of steady flow. The result of reckoning using existing programs show a cross section rivers cannot accommodate discharge plan. Similarly with its drainage channels. Treatment done with increased capacity rivers and drainage channels. River cross section in the normalization with three types of cross-section (type I near the lower B = 7 m and H = 3, 5 m, midstream type II B = 6, 5 m and H = 3, 5 m, type III near the upper B = 5 and H = 3, 5 m). While cross section drainages deepened and assembly of a parapet to prevent the overflow.
PERENCANAAN BENDUNGAN TUGU KABUPATEN TRENGGALEK Wibowo, Tedy; Putro, Rizki Dwi; Sangkawati, Sri; Nugroho, Hari
JURNAL KARYA TEKNIK SIPIL Volume 3, Nomor 4, Tahun 2014
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

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Tugu Dam is a dam that was built to needs of irrigation water and raw water needs necessary. It had built on the Keser River with catchmen area of river is 43,06 km2, with a length of river is 9,295 km. Administratively located in the Nglinggis Village, Tugu Subdistrict, Trenggalek Regency, East Java Province and is geographically located at position 8˚1 - 8˚3 south latitude and 111˚34 - 111˚37 east longitude. Before the Tugu Dam was built, water irrigation fulfillment necessary done by taking water from the Keser River, but water irrigation requirement not maximum because the water taking from the Keser River done with pump system. Tugu Dam is expected to fulfill the irrigation water of Tugu irrigationwith a total area of 1.106 hectare, and fulfill of the raw water in Nglinggis, Pucang Anak, Dermosari, Winong and Tegaren Village of Tugu District on Trenggalek Regency with a projected total populations in 2042 is 19.589 inhabitants. Before planning a dam, the initial step is the hydrological analysis with the result that be discovered gauge the dependable discharge, needs water discharge and flood discharge. In the Tugu Dam planning dependable discharge used is the discharge with probability 80%. Water needs value to fulfill the irrigation water requirement is 0,81 liters/sec/hectare or water needs discharge for water irrigation is 0,90 m3/sec and water needs discharge for raw water is 0,03 m3/sec. Flood discharge using HSS Gama I method for return period of 1000 years of 667,70 m3/sec is used as the basic for search flood analysis (flood routing)by means of the spillway to obtain the dimensions of the main dam and the spillway. Tugu Dam planned using the rock fill dam material with watertight clay core with a slope of 1 : 2,25 in the upstream and 1 : 2,00 in the downstream. Elevated of dam is 69,00 m, the wide of the peak is 12,00 m, wide of the base dam is 301,00 m and full length of the dam is 309,26 m with a 30-year design lifetime of the dam and reservoir volume of 6.12 million m3. Spillway design with specific such as OGEE peak wide of 10,00 m, USBR type II for stilling basin with pool dimensions of 10x55 m and 553,00 m long tunnel deterrent with a diameter of 3,00 m with a number of 2 pieces. Tugu Dam planned at a cost of +495,50 billions rupiahs, and planned implementation time +560 working days.
PERENCANAAN NORMALISASI SUNGAI BERINGIN DI KOTA SEMARANG Putra, Dimaz Pradana; Suharyanto, Suharyanto; Nugroho, Hari
JURNAL KARYA TEKNIK SIPIL Volume 3, Nomor 4, Tahun 2014
Publisher : Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro

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Reduced green open areas and forests in upstream of Beringin watershed areas is affect the run-off, so it is possible resulting in increased surface run-off, decreased time of concentration, and at the same time a decrease in groundwater recharge. Thus the flow in the rainy season will tend to rise and discharge will decrease in the dry season. Comparison of rivers Qmax (usually in the rainy season) and Qmin (in the dry season) is very large. The greater the ratio of rivers Qmax to Qmin, indicating the further degradation of the watershed. Upstream areas in the South is quite hilly with steep slopes, with a height of 12.5 m to 250 m. The issue of Beringin River originated from land use change in the uplands, especially on open land (forest, shrubs, and farm or agricultural) into housing and settlement, causing flooding in the watershed  Beringin. To calculate the average maximum rainfall-average using Thiessen polygon method with three rainfall stations that affect which is the Mijen, Tugu, and Mangkang Waduk. Rainfall data were used from 2003 till 2012, while the flood discharge plans taken from the calculation method of HSS Gama I  with a return period of 10 years at 180.59 m3/s. Normalization is planned in the main river along the 7.18 km, from the estuary (STA 0) to the arround Mangkang regency (STA 23). Varying the width of the river is 14 m of STA 0 to STA 8, 12 m of STA 9 to STA 19, and 10 m of STA 20 to STA 23 with the same slope at 1: 1.5. This cross section plan has previously been simulated with HEC-RAS 3.1.3 program and the results was they were able to accommodate discharge plan that occurs. Safety height of 0.6 m was added in each cross section above the water level of the river. Revetments also added to the bend of the river in STA 22-23 with a length of 200 m and a height of 4m. This project implementation is scheduled for 28 weeks with a budget plan of of Rp 16,881,359,000.00.
Co-Authors Abdul Kadir Abrianto, Hari Aedo Radewa Nayapada, Aedo Radewa Ajeng Aprilia Romdhon Anesya, Vira Aprilawati, Dwi Arie Damayanti Arif Hidayat Aryowibowo, Utomo Assgaf, Emha Afif bestari, Claudia pualam Bintang, Sendy Buchori, Afif Bani Chinthia Ayu Berlian P., Chinthia Ayu Cut Dede Juanita Darsono, Suseso Dimaz Pradana Putra Dwi Kurniani dwi Subandriyani Erniwati Erniwati Estiana, Rizka Etika Herdiarti Falah, As'ad Izul Feizal W, Andika Ferlian, Andrivo Hafidz Noordianto Hendra Setiawan Ichsan, Muhammad Noer James M Carpenter, James M Jun-ichi Kojima, Jun-ichi Khirzy M, Akhmad Kunto Dwi Utomo Kusumardi wibowo, Nur Rendra Larisa, Adeline M. Agung Wibowo Maddaremmeng A Panennungi Manthiq, Tivri Mawarid, Akhmad Khirzy Mega Asiska Ninda Pratiwi, Mega Asiska Ninda Mega Asiska, Mega Muchammad Lutfian Nabil Muhammad Taufiq Abror, Muhammad Taufiq Novita Afrianti Panjaitan, Novita Afrianti Nugroho, Sriyana Hari Nur Afifah Nur Wakhid Nuraini Nuraini Panennungi, Maddaremmeng Andi paringhan, yohanes gylberd Pasay, N. Haidy Ahmad Pranandari, Listiana Rizka Pranoto Samto Admojo Pranoto Sapto Atmojo, Pranoto Sapto Priyanti, Ade Priyo Nugroho Priyo Nugroho Parmantoro Pungki Lupiyanindyah, Pungki Randy Putranto Adhi, Randy Putranto Rano Adiyoso Ricky Darmawan Rizka Setiawan, Rizka Rizki Ade Khoir, Rizki Ade Rizki Dwi Putro Rizki Simanullang, Syaipul Robert J. Kodoatie Rohendi, Adi Putra Shalli Malia Nisa Sih Kahono Slamet Hargono Sri Eko Wahyuni Sri Sangkawati Sriyana Sriyana SUHARYANTO SUHARYANTO Sumbogo Pranoto Suripin Suripin Suseno Darsono Sutarto Edhisono Suwarto Hari Sulakso, Suwarto Hari Tedy Wibowo Tito, Kindy Akhmad Trianto, Ekki Febri Wahyu Kuncoro Wahyuningsih, Catur Ayu Wulansari, Aisha Cahya Yoel, Sam Zainal Arifin