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All Journal JURNAL KARYA TEKNIK SIPIL
Abdul Kadir
Jurusan Teknik Sipil FT. UNDIP Jl. Prof. Soedarto SH. Tembalang, Semarang 50275
Civil Engineering, Building, Construction & Architecture

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PERENCANAAN PEMBANGKIT LISTRIK TENAGA MINI HIDRO DI SUNGAI LOGAWA, KABUPATEN BANYUMAS Apriadi Ali Ramadhan; Arie Al Asyari; Suharyanto Suharyanto; Abdul Kadir
Jurnal Karya Teknik Sipil Volume 2, Nomor 2, Tahun 2013
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Electricity is a basic human need. Human activity will be disrupted if the availability of electrical energy is also affected. This condition is also currently being experienced by the people of Indonesia. There has been an energy crisis in some regions of Indonesia, particularly in Java - Bali where the area is the center of activity in Indonesia. This is indicated by the frequent occurrence of blackouts in rotation as in most cities in Indonesia. The crisis caused by an imbalance between  supply and demand of electricity usage. Meanwhile, the ability of the government, in this case the PLN in providing the electricity needs is very limited. Therefore, the government is encouraging private sectors and communities to participate in the production of alternative energy, one of which is the Mini Hydro Power Plant. Banyumas Regency has a potential river to build as Mini Hydro Power Plant. This mini hydro power plant will utilize the waterflow from the rivers. The electrical energy produced will be supplied to the Java – Bali interconnection network so that electricity supply can increase the Java – Bali capacity. In this  PLTMH  Logawa is planned to generate 616 kWh of power which can serve approximately 600 homes with the assumption that the usage of the power is about  900 watts per hours. It requires investment funds for the construction works amounting to Rp.25,265,787,700,-
Rehabilitasi Desain Bendung Tukuman Kali Dengkeng Cawas Kabupaten Klaten– Jawa Tengah Adi Setyo Christanto; Aditya Yoga Kusuma; Abdul Kadir; Dwi Kurniani
Jurnal Karya Teknik Sipil Volume 2, Nomor 1, Tahun 2013
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Tukuman Weir is a weir of Dengkeng Cawas River, Klaten Regency, Central Java. This weir got a severe damage due to the excessive discharge in December 1989. This caused the people around the weir irrigated their field by free intake. The problems discussed in this paper are 1) the damage of the weir overflow, and 2) the damage of the tail water. The aim of the research is to maximize the flow of water into the irrigation network that the need of irrigation water can be met properly to increase the income of farmers each year. This research uses the latest data which then is processed by using hydrological analysis as the basic of the next planning. Watershed (DAS) of Dengkeng River is 101, 157 km2 in large, with three rain stations: Gantiwarno, Kemudo and Ngelo. The calculation of flood discharge plan uses several methods. The chosen discharge is the result of the calculation using HSS Gama I method with return period of 100 years, then continued with Qdesign=110 m3/sec. The large of the irrigation area of Tukuman weir is 150 hectares, with 0.22 m3/sec water need. From the result of the balance sheet analysis, the need of water irrigation is fulfilled, even it is a surplus. The rehabilitation concept is combining the fixed and barrage, but keeping the elevation of the old weir overflow. The redesign of the weir dimension with the fixed weir, the elevation height of the overflow is +102.02 m.dpl, rounded overflow with effective width of 7.75 m. While for the motion overflow, the overflow elevation is +99.7 m.dpl as planned, with 5 doors and effective width of each is 2.5 m. the length of the floor to the weir face is 10.5 m as planned, and the tail water of USBR type III is chosen. The cost of the weir rehabilitation is Rp. 3,241,000,000 with time estimation is 20 weeks. Based on the calculation, it is obtained that there is surplus on the water need that might be considered using it for other needs, for instance, enlarging the irrigation area or fulfilling drinking water needs.
PERENCANAAN SISTEM JARINGAN TAMBAK GARAM DI PEMONGKONG KABUPATEN LOMBOK TIMUR Rano Adiyoso; Ricky Darmawan; Abdul Kadir; Hari Nugroho
Jurnal Karya Teknik Sipil Volume 3, Nomor 1, Tahun 2014
Publisher : Departemen 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 SISTEM DRAINASE PASAR JOHAR SEMARANG Arif Wicaksono; Pungky Dwi Saputra; Hari Budieny; Abdul Kadir
Jurnal Karya Teknik Sipil Volume 2, Nomor 2, Tahun 2013
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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As trade area which is located in the north of the Semarang City, Johar is an area prone to flood. That's because the drainage canal superficiality clog due to garbage, the channel capacity is not large enough and the pump capacity is not sufficient. Johar is at a height that is almost equal to the sea surface which land subsidence periodically, so as to Johar area, water flows through a drainage pump with Kali Semarang as an elongated catch. The method we used to handle the flood of Pasar Johar is by calculating the flood discharge, isolate the area around the elevation of the road which serves as a dike, enlarge the channel that is not enough, enlarge the channel that is not enough and made sluice in preparation if the pump can not operated. From the calculation, some channels have increased flow capacity. Type of partner channels with bony concrete / precast planned to increase the capacity of Existing stream channel is the channel type C with a width of 1000 mm and 1000 mm high channels. There are 5 channel capacity should be increased. To remove the water from the drainage channel used pumps which located in the drainage pump house. Pump house planned 3 units main pump installed and 1 unit reserved. Maximum discharge for each pump is  0.35 m3/second. Drainage channels connected to the house by using the channel pump. When only light rain occurred, simply lit one pump only. While in the event of heavy rain, so can lit two or three pumps. Thus the application of more efficient pump. Time waster channels streamed to Semarang with waste pipe from the pump drainage. Waste pipe is made with galvanized materials with elements lighter than steel and stainless steel. Based on the calculations, the total cost for the Design of  Johar Drainage System  is 8,471,009,500.00 rupiah.
PEMANFAATAN KRIB UNTUK PENGGELONTORAN SEDIMEN PADA MUARA SUNGAI (STUDI KASUS MUARA SUNGAI JUWANA) Jati Widhiasmoro; Perdana Gutomo Putra; Salamun Salamun; Abdul Kadir
Jurnal Karya Teknik Sipil Volume 2, Nomor 4, Tahun 2013
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

Sedimentation is often happen in low-ground area. Where the minimum slope of the river caused a low-velocity in river flow. A low-velocity flow made the particles of sand drownded to the river bed because of the gravity. Low-velocity flow also cause by the tide of sea. It is why sedimentation is happen in estuary.In Juwana river case, using SMS 8.1 software with RMA2 model, on the highest tide, with the quantity of river-flow is 100 m3/s gained 0,15 m/s of the river velocity. Based on Hjulstorm diagram (Sundborg modification), with this velocity of river flow, will cause a sediment of anykind sand-particle.  Placing 6 of 45x45 square piles, 2 m between each pile on formation and placed every 50 m along side the river and when the river quantity is 100 m3/s at the highest tide, give a significant additional speed. It will rising the velocity up between 0,14 to 0,17 m/s.  In other word, the velocity of Juwana river becomes 0,29 m/s to 0,32 m/s, which is high enough to flush a fine-sand sediment.
Co-Authors Adi Setyo Christanto Aditya Yoga Kusuma Apriadi Ali Ramadhan Arie Al Asyari Arif Wicaksono Dwi Kurniani Hari Budieny Hari Nugroho Jati Widhiasmoro Maemonah, Maemonah Perdana Gutomo Putra Pungky Dwi Saputra Rano Adiyoso Ricky Darmawan Salamun Salamun