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All Journal JURNAL KARYA TEKNIK SIPIL
Pranoto Sapto Atmojo
Jurusan Teknik Sipil FT. Undip Jl. Prof. H. Soedarto SH., Tembalang, Semarang 50275
Civil Engineering, Building, Construction & Architecture

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PERENCANAAN SUDETAN UNTUK PENANGGULANGAN GERUSAN TEBING DI SUNGAI LUSI Aedo Radewa Nayapada; Suwarto Hari Sulakso; Pranoto Sapto Atmojo; Hari Nugroho
Jurnal Karya Teknik Sipil Volume 4, Nomor 4, Tahun 2015
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Flood is a condition in which the rain water runoff is not able to be streamed by a river due to water discharge flow exceeds the capacity flow over to to areas that are not as functions. The problem of flooding that occurred in the village of Kendayaan Ngawen Blora caused by Lusi River overflow. At the area meandering river channel (meander) so that when the flood discharge causes overflow and bank scouring. To overcome these problems planned for river shortcut and checkdam. Shortcut serves to divert the flow of water so it does not happen again outburst floods. While checkdam serves to reduce bank scouring due to the speed that is too high after the river shortcut design. The maximum discharge of the river with a certain return period is calculated by using the method of Melchior, FSR Java-Sumatra, Flood Marking and Passing Capacity. Obtained from the calculation of flood discharge plan (Q50) of 622 m3/s. Then proceed calculations using HEC-RAS software to determine the impact of the flood discharge plan to the cross section of the river, so that it can be seen a part of the river that needs to be repaired. Part of the river needs to be fixed is at (STA L.610-L.613) along the ± 810 m. The repair process is done by river shortcut design while maintaining the existing river channel. Flood discharge flow divider discharge shared use of the building to the proportion of 500 m3/s in shortcut and 122 m3/s on existing groove. With the second building above expected flood in the village Kendayaan can be controlled.
PERENCANAAN CHECK DAM SUNGAI GLUGU KABUPATEN GROBOGAN, JAWA TENGAH Abhibawa Tegar Kusuma; Deny Wijayanti; Pranoto Sapto Atmojo; Sutarto Edhisono
Jurnal Karya Teknik Sipil Volume 4, Nomor 4, Tahun 2015
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Diponegoro

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Abstract

Glugu River is a tributary of the Lusi River under the authority of the Central River Region Pemali - Juana, precisely located in the administrative area of the Grobogan Regency. Location of Glugu River located upstream, gave effect to the degradation of the river channel, so as to stabilize the river flow necessary to design coservation structure on Glugu River, that is check dam.The data used for design check dam are the primary data (geotechnical, geometry Glugu River, and water when the flood elevation data) and secondary data (topographic maps and rainfall data). These data are used as a basis for planning the main dam, sub dam, apron, complement structure, stability control of structure, and as reference for determining the budget plan. From the calculation, the height of main dam is 5.00 m, the width spillway of main dam and sub dam are 41.00 m, the width crest of main dam is 2.50 m and the width crest of sub dam is 1.50 m, the upstream slope of the main dam and sub dam are 1 : 0.9, the downstream slope of the main dam and sub dam are 1 : 0.2, the width wing of main dam is 2.50 m and the width wing of sub dam is 1.50 m, the height of sub dam is 1.80 m, the length of apron is 17.87 m, the side of square -shaped drip holes are 0.5 m as 16 pieces. Check dam can accomodate 17112.29 m3of sediment and will be full for 1.27 years.The total cost to build the check dam of Glugu River is IDR 2,418,643,000.00 include VAT 10% and 210 days work construction.
Co-Authors Abhibawa Tegar Kusuma Aedo Radewa Nayapada Deny Wijayanti Hari Nugroho Sutarto Edhisono Suwarto Hari Sulakso