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All Journal Civil Engineering Forum Teknik Sipil MEDIA KOMUNIKASI TEKNIK SIPIL ComTech: Computer, Mathematics and Engineering Applications
Nur Yuwono
Jurusan Teknik Sipil dan Lingkungan, Fakultas Teknik, Universitas Gadjah Mada
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Mathematics

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FORMULAS1 SISTIM PIPA BERPORI BAWAH TANAH DAN PENERAPANNYA Nasjono, Judi K.; Yuwono, Nur; Triatmadja, Radianta
Civil Engineering Forum Teknik Sipil Vol 17, No 3 (2007): SEPTEMBER 2007
Publisher : Civil Engineering Forum Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (194.252 KB)

Abstract

One advantage of saline water intrusion phenomena is that saline water may be obtained from shallow well close to coastline. The method is friendly to the environment. Shallow well of depth less than 40 times of ground water height measured from seawater level produce a small amount of saline water. Additional saline intrusion discharge may be obtained by installing seaward horizontal perforated pipe at the bottom of well. Research of seepage discharge trough perforated pipe has been done using physical model with tree variation of pipe diameter. Each pipe was varied in length, perforation diameter, and gap of perforation. They were placed at three various depths under sand surface. To simulate the tidal fluctuation there was four variation of water level. Discharge was obtained from all model combination. The result of the research is a formula that was derived from Darcy formula. The formula could be useful to design. It indicates that there are correlation between depth of pipe burial, pipe length, pipe diameter, head, porosity of pipe and discharge
Transmisi dan Refleksi Gelombang pada Pemecah Gelombang Ambang Rendah Ganda Tumpukan Batu Surendro, Bambang; Yuwono, Nur; Darsono, Suseno
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 2, DESEMBER 2014
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (718.552 KB) | DOI: 10.14710/mkts.v20i2.9259

Abstract

Protection of beaches for tourism development, protection planning in addition to aiming to keep the damage to the beach will also need to think about the authenticity and beauty of the beach area . Building protective beaches that can meet these objectives include low threshold breakwaters (submerged breakwater). Some of the excessuse of low threshold breakwaters are: 1. No disturbing beauty of the beach; 2. because construction is under water, then when the wave comes partially absorbed wave energy, will be partially reflected, and the rest will be transmitted; 3. can become breeding grounds for fish, because the construction is hollow. The disadvantages are: 1. requires a large stone with a large number, 2. in the assembly requires a supporting infrastructure such as transport  equipment, long bridge, lifting equipment etc, thus requiring a lot of cost. Based on that research conducted by the title of the transmission and reflection of waves on double sumerged breakwater. Methodology of research, conducted with with physical models, and then continued with theoretical studies in order to obtain the equation for calculating the coefficient of wave  transmission and wave reflection coefficient. The results showed that to calculate the magnitude of the coefficient of wave transmission and wave reflection coefficient can be approximated by the following equation: , .
Transmisi Gelombang pada Pemecah Gelombang Ambang Rendah Ganda Surendro, Bambang; Yuwono, Nur; Darsono, Suseno
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (917.764 KB) | DOI: 10.14710/mkts.v20i1.9242

Abstract

Coastal protection efforts can be done in various ways, among others, by making alow threshold breakwaters (sumerged breakwater). Every building in addition there is certainly no shortage of excess. With several weaknesses breakwater low threshold, then conducted research with the title “Wave Transmission At Low Threshold Dual-breaking waves". The study was conducted in the Hydraulic laboratory of the Faculty of Engineering, Tidar Magelang University, with variations of the model as follows: Model I : single low threshold breakwater piles of stones (PGARTTB) with peak width (B)=120 cm Model II : a low threshold double breakwater piles of stones (PGARGTB) formed by reducing material PGARTTB protective stone that is in the middle as much as 8.89%, 20%, 33.33%, and 46.67%. The results showed that: a) Reduction of material protection on the stone breakwater lowthreshold single pile of stones (PGARTTB) affect the magnitude of the wave transmission, b) reduced protective stone will increase the value of the wave transmission coefficient c) for each reduction of 1% a protective stone, waves of up 0.2788% transmission, d) the increase in transmission waves are caused by the reduced friction between the base and peak wave breakwaters low threshold.
SHORELINE CHANGE WITH GROIN COASTAL PROTECTION STRUCTURE AT NORTH JAVA BEACH Setyandito, Oki; Purnama, Aldo Christanto; Yuwono, Nur; Juliastuti, Juliastuti; Wijayanti, Yureana
ComTech: Computer, Mathematics and Engineering Applications Vol 11, No 1 (2020): ComTech (Inpress)
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v11i1.6022

Abstract

The research aimed to study the effect of groin application to erosion at the shoreline. The method utilized the bathymetry and topography data of north beach of Balongan, West Java. Modeling of the shoreline change due to groin installment used software called GENESIS. Based on analysis result, it is found that the significant wave direction comes from the southeast with significant wave height of 1,18 meters and surf zone width of 140 meters. It is concluded that at research area of north beach of west Java, I-groin with length of 70 meters and T head groin of 60 meters in long T-groin effectively overcome erosion and advance the coastline by 10786,62 m2 orin av erage 6,3 meters.
Co-Authors Bambang Surendro Judi K. Nasjono Juliastuti Juliastuti Nizam Mr., Nizam Oki Setyandito, Oki Purnama, Aldo Christanto Radianta Triadmadja Suseno Darsono Wijayanti, Yureana