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All Journal Civil Engineering Journal Aptekmas : Jurnal Pengabdian Kepada Masyarakat Jurnal Sains dan Teknologi Jurnal Sipil Terapan
Ira Widyastuti
Universitas Cenderawasih, Indonesia
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 1 
Dam-Break Energy of Porous Structure for Scour Countermeasure at Bridge Abutment Ira Widyastuti; M. Arsyad Thaha; Rita Tahir Lopa; Mukhsan Putra Hatta
Civil Engineering Journal Vol 8, No 12 (2022): December
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2022-08-12-019

Abstract

The aim of the study is to determine the structure for energy absorption in order to countermeasure the scouring on the bridge abutment. Consider a porous structure for energy absorption, which can reduce flow velocity and depth of scouring due to its porosity. The energy absorber plate demonstrated in triangular shape with several porous as submerged barrier. The investigation was conducted in laboratory and placed the abutment in the middle of the channel with a distance of 3Lb, 5Lb, 7Lb and 9Lb. The plate area consists of 0% (MP1), 5% (MP2), and 10% (MP3). The scour depth measurement (ds) is carried out at 6 crucial points in the abutment area. Comparisons between experimental measurements and a numerical prediction model are presented. The experimental results show that the percentage of frictional velocity in the inhibition area for each pore opening before the obstacle, 31.42% (decreasing), - 9.27% (increasing), and -32.92% (increasing), respectively. Furthermore, the optimum position of the porous energy absorber at 9Lb to the abutment. The magnitude decreases of scour depth obtained from MP2. It can be concluded that the placement of energy absorbers can lead to damping forces. It also found that the porous structures could be beneficial for motion damping and absorber of the scouring. Doi: 10.28991/CEJ-2022-08-12-019 Full Text: PDF
The Effect of Triangle Slope Variation on Froude Number with Numerical Simulation Mukhsan Putra Hatta; Ira Widyastuti; Andi Muh. M. Makkarumpa’
Civil Engineering Journal Vol 9, No 12 (2023): December
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2023-09-12-012

Abstract

Many parameters can be influenced by speed flow, like form resistance and speed flow. Form obstacles influence structure turbulent flowing water, so that can raise potency change speed and pattern flow around the structure building. This study considers the tilted corner prisoner structure triangle and incoming water flow to influence the pattern and speed flow that occur after the genre through the obstacle triangle using IRic simulation. IRIC is a simulation platform that supports numeric and various breaker computing problems in water science and engineering. The variations of the corner prisoner plate triangle used in this study are 30°, 45°, and 60°. The transverse channel is blocked with a ratio of β = 1/10, and upstream-downstream boundary conditions are open. Results show what will happen in the genre critical moment pass structure. Because the change is significant, Froude's number. Observations that took place showed that speed flow on each slope was stable before the pass structure and was not stable after the pass structure. Whirlpools occur on a45° slope, so the speed flow that occurs will increase significantly. On an incline of60°, it will have the largest Froude number, which is caused by the depth (D)created by the 60°angle being higher in comparison with another slope. For an incline of30°, show speed, more flow, and a constant flow with a bigger Froude number. Doi: 10.28991/CEJ-2023-09-12-012 Full Text: PDF
Analisa Penyebab Penurunan Badan Jalan Di Ruas Jalan Baru Furia Kotaraja STA (0+000 – 0+520) Alfian Adie Chandra; Ira Widyastuti; Maurids Thomas Sapari
Jurnal Sipil Terapan Vol. 1 No. 1 (2023): Mei: Jurnal Sipil Terapan
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/jusit.v1i1.103

Abstract

Topography in Papua is generally an area consisting of mountains and valleys that have various slopes. Means of transportation was planned in such a way that it had to go through the slope. One of them is on the New Furia Kotaraja road section. On this road section, the slope is cut so that the road is made safe and comfortable for motorists to pass. However, at several points there was damage to the road body which was identified as a landslide, namely the formation of an avalanche crown on the surface of the road body. Therefore it is necessary to analyze the stability of the slopes in order to obtain ways to overcome them. Analysis of slope stability on the New Furia Kotaraja road section used the GeoStudio 2007 Slope/W assist program and manually used the Fellenius method. From the analysis that has been carried out, given the condition of the road load and pore water pressure, it can be concluded that the slopes on the New Furia Kotaraja road section Km 0+000 – 0+520 are unstable slopes because according to the results of the calculation of the slope safety factor based on the Fellenius formula, namely 0.589, according to Bowles, the slope is unstable if the factor of safety is less than 1.07. Thus, the slopes on the Baru Furia Kotaraja Km 0+520 road section need to be treated in the form of a box cover / culvert, with a surface depth of 280 cm box coler because at that depth it has a rather dense soil type, silty sand, and a channel is also planned. square type drainage with dimensions (b = 2.00 ; h = 1.70 m ) to drain water discharge (Q = 0.68 m3/s), the slope becomes stable because the slope safety factor changes to 1.259 which according to Bowles's opinion the slope is included stable when the factor of safety is above 1.25.
Analisis Kebutuhan Air Bersih Dusun Waya Udara Kecamatan Tehoru Kabupaten Maluku Tengah Juned Habel; Mujiati Mujiati; Dewi Ana Rusim; Ira Widyastuti; Davy Ivan Robert Jansen
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.380

Abstract

The need for clean water increases every year, this is due to an uncontrolled increase in population growth so that the population is directly proportional to water needs. The problem of increasing water availability and demand due to the impact of uncontrolled population growth is also felt in Waya Udara Hamlet, Tehoru District, Central Maluku Regency. The reservoir clean water distribution network system was built to meet the clean water needs of the people of Waya Udara Hamlet at that time, but with the population growth that increased the need for clean water, so residents looked for other ways to meet clean water needs This research uses a type of quantative research with a descriptive method that aims to find facts that actually occur in the field. In this study, the study population was all heads of families in Waya Udara Hamlet, Tehoru District, Central Maluku Regency. The number of households in the village is 90 households. Analysis and Assessment of Community Satisfaction Level with Clean Water Service Distribution Service quality is one of the techniques for measuring the level of satisfaction. The results of the analysis of the level of satisfaction with the clean water service of Waya Udara Hamlet through the results of questionnaires for satisfaction, from the aspects of taste, color, smell, taste and turbidity are very satisfying. From the aspect of needs, water discharge, water tariffs are also very satisfied with the average satisfaction with needs and availability as well as tariffs and water discharge because of the results of the analysis of availability and needs. for the analysis of the availability and need for clean water of Waya Udara Hamlet in 2023 is 47.79 m3 / day for the needs of a population of 354 people and for the projection of the next 10 years in 2033 with a population of 496 people requires water as much as 66.9 m3 / day based on the discharge availability at the source is 4.97 liters / second with 1 hour filling the reservoir bath is 17.89 m3 / hour with the filling time for the reservoir for 100 m3 / day is 5.89 hours / m3 / tub. From the results of the analysis, it can be seen that the availability is greater than the need for projections for the next 10 years and from the results of the analysis on SPSS-22 the level of satisfaction with the use of clean water in the Waya Udara Hamlet Community is satisfactory because the availability and need for water are met.
PEMBERDAYAAN IBU-IBU PKK MELALUI PENDIDIKAN UMKM DENDENG DAUN PEPAYA Wiji Astika, Yulia; Sasmita Rusnaini; Ira Widyastuti; Tarjo; Syah Amin Albadry; Teta Wismar
Aptekmas Jurnal Pengabdian pada Masyarakat Vol 6 No 4 (2023): APTEKMAS Volume 6 Nomor 4 2023
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36257/apts.v6i4.8237

Abstract

The problem that occured in Dwi Karya Bakti Hamlet was that PKK activities and programs were not active in the village. The challenge undertaken by the service team was to reactivate the activities and programs that had been prepared by the PKK Dusun Dwi Karya Bakti. For this reason, the social service team approached the head of the committee and looked for problems and solutions to these problems. From these observations, the service team received information that the community, especially the member of PKK needed a facilitator or mentor to develop the PKK so that the PKK could be active again. The target of this activity focused on empowering the members of PKK in Dwi Karya Bakti. The aimed of carrying out this community service activity was to increase household income, entrepreneurial for the members of PKK, and improved the social life of the residents of Dwi Karyabakti. The methods used in this activity were educational methods and mentoring methods. Educational methods include training and mentoring methods included direct practice in making Dendeng Daun Pepaya. The implementation of the social service activities that have been carried out has a positive impact on the community, namely the members of PKK who were the targets of these service activities. The members of PKK Dwi Karya Bakti have started to have motivation to improve their abilities and creativity in developing UMKM.
Co-Authors Alfian Adie Chandra Andi Muh. M. Makkarumpa’ Davy Ivan Robert Jansen Juned Habel M. Arsyad Thaha Maurids Thomas Sapari Mujiati Mujiati Mukhsan Putra Hatta Mukhsan Putra Hatta, Mukhsan Putra Rita Tahir Lopa Rusim, Dewi Ana Sasmita Rusnaini Syah Amin Albadry Tarjo Tarjo Wiji Astika, Yulia Wismar, Teta