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All Journal NALARs Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Prokons: Jurnal Teknik Sipil Jurnal Inersia GANESHA: Jurnal Pengabdian Masyarakat
Efendi, Medi
Politeknik Negeri Malang
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Journal : Prokons: Jurnal Teknik Sipil

 1 
ANALISIS ALIRAN BALIK (BACKWATER) PADA AMBANG GERIGI harsanti, ST., MT, winda; Efendi, Medi; Riskijah, Sitti Safiatus
Prokons: Jurnal Teknik Sipil Vol 14, No 2 (2020): Agustus 2020
Publisher : Jurusan Teknik Sipil, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/prokons.v14i2.244

Abstract

Gerigi weir is a modificated jigsaw weir which can hold water flow to gain higher water level. This water raising happens in upstream of the weir until certain length to reach normal depth. This research uses square open channel model with slope as an independent variable. In this research uses various slope from 1‰ to 5‰ for eight different discharges. The aim of this research is to find the impact of slope for backwater length using Direct Step Method. The result of this research is the longest back water happened in the 8th of experiment discharge (1399,984 cm3/sec) with the slope of 3‰, by 40.800,4952 cm from the weir. In addition, slope is not affect for the length of backwater. This is because from all analysis of experiments, the longest backwater happens in different slope for each discharge, namely between 1‰, 3‰, or 4‰ of slope.                      Keywords: back water, gerigi weir, slope
KELAYAKAN FINANSIAL PROYEK PEMBANGUNAN PERUMAHAN THE CITY INSIDE KOTA MALANG Bagas Putranto, Djoko Trijanto, Medi Efendi
Prokons: Jurnal Teknik Sipil Vol. 12 No. 2 August 2018
Publisher : Jurusan Teknik Sipil, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/prokons.v12i2.157

Abstract

1.2 ha The City Inside is a housing construction project. This thesis is financial feasibility study to find out the house and the profit of the project through cash flows, Payback Period (PP), Net Present Value (NPV), Internal Rate of Return (IRR), Profitability Index (IP), and Benefit Cost Ratio (BCR) of types 47 and 65. Besides, the technical feasibility study discusses about the construction and implementation schedule of the project.The required data were of site plan, technical drawings, analysis of work unit price of Malang 2017. The financial feasibility results in IDR164.299.587,00 of type 47 and price of type 65; IDR339.734.500,00  operational cost; IDR188.830.077 for type 47 and IDR226.296.554,00 for type 65,  public facility; IDR94.591.130,00  cash inflow; IDR64.031.357.341,04  cash out flow; IDR46.492.361.358,33  NPV value meaning feasible to run ;interest IRR of 13.87% >12% meaning feasible and the 1.398 BCR meaning feasible;  feasible in 5.3 years PP. The sensitivity level at the rise and fall of 5% - 20% profit value, The sensitivity level at the rise and fall of 5% - 20% out cost value , The sensitivity level at the rise and fall of 5% - 20% of bank discount.The technical study results in orderly construction method  for type 47.  Keywords: financial, technical, feasibility, sensitivity analysis
PERENCANAAN EMBUNG GUWOREJO KECAMATAN TAROKAN KABUPATEN KEDIRI Yuono Mugi Kuncoro; Djoko Trijanto; Medi Efendi
Prokons: Jurnal Teknik Sipil Vol. 12 No. 1 February 2018
Publisher : Jurusan Teknik Sipil, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/prokons.v12i1.153

Abstract

In dry season Tarokan Sub-district of Kediri, often suffers from drought, so a small dam (embung) was required. The objectives of the study are to determine the dimension of the dam, its spillway and to analyze its stability. The required data were of rainfall, topographic maps, soil, and population.The initial design was hydrologic analysis by finding out the planned discharge Q50 and determining the water volume of inflow. To determine the effective catchment ponds, capacity analysis using topographical data and comparing the volume of water available. And analysis of spillway to determine the flood water level.The analyses result, the amount of the water needs of a population of 258.854.400m3, and the magnitude of the draft Q50 discharge of in 4.027 m3/sec (The  room  for  sediment  is  29,234.9 m3  at  elevation  1 m from the bottom of the pool); 390,000m3 effective capacity at +131.75 elevation, and flood water level at +132.75 elevation. The dimension of embung main dam is 6 m deep; embung crest at +133.00 elevation ; 3m wide embung crest ; 1:3 upstream slope; 1 : 2.25 downstream slope ; 10 m wide spillway channel 1 : 1 slope of wall of spillway channel ; and crest of spillway at +131.75. Geostudio software was used to calculate the figures safety against sliding. Keywords: embung, spillway, embung dimensions, slope stabilty
Co-Authors Anisah Nur Fajarwati Aulia Rahman Ayisya Cindy Harifa Dandung Novianto Djoko Trijanto harsanti, ST., MT, winda Martince Novianti Bani Rizki Putri Ramadhani Sitti Safiatus Riskijah Sudarmanto Sudarmanto Sugeng Riyanto Suhariyanto Suhariyanto Sutikno Sutikno Yuono Mugi Kuncoro