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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.
PELATIHAN SOFT SKILL DAN HARD SKILL BAGI MAHASISWA UNTUK MENINGKATKAN DAYA SAING DAN KESIAPAN KERJA Ira Widyastuti; Syah Amin Albadry; Deni Handani; Sasmita Rusnaini; Siti Rahmiati; Ha esdhona; Feri Antoni
BHAKTI NAGORI (Jurnal Pengabdian kepada Masyarakat) Vol. 5 No. 2 (2025): BHAKTI NAGORI (Jurnal Pengabdian kepada Masyarakat) Desember 2025
Publisher : LPPM UNIKS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/bhakti_nagori.v5i2.4975

Abstract

Dalam menghadapi tantangan dunia kerja di era Revolusi Industri 4.0 saat ini, mahasiswa dituntut memiliki kompetensi yang seimbang antara hard skill (keterampilan teknis) dan soft skill (keterampilan non-teknis). Fakta menunjukkan bahwa kurangnya kesiapan kerja dan persaingan yang rendah masih menyulitkan banyak lulusan perguruan tinggi untuk masuk ke dunia kerja. Tujuan dari kegiatan PKM ini adalah untuk meningkatkan kemampuan siswa melalui pelatihan yang menggabungkan hard skill (seperti keterampilan digital, penggunaan teknologi, dan analisis data) dengan soft skill (seperti komunikasi, kepemimpinan, manajemen waktu, dan kerja sama tim). Metode pelaksanaan dilakukan melalui pelatihan interaktif, simulasi kasus dan pendampingan intensif oleh narasumber. Diharapkan bahwa kegiatan ini akan membuat mahasiswa lebih siap kerja, kompetitif di seluruh dunia, dan mampu menyesuaikan diri dengan perubahan kebutuhan industri. Manfaat yang diharapkan dari kegiatan ini tidak hanya dirasakan oleh mahasiswa yang berpartisipasi; itu juga dapat berfungsi sebagai model pembinaan kompetensi yang dapat direplikasi yang menekankan untuk peningkatan kualitas sumber daya manusia demgan itu mereka bisa bersaing di pasar kerja global.
Optimization of Water Purification Infrastructures in Supiori Regency Markus Sawaki; Ira Widyastuti; Duha Awaludin; Bernathius Julison; Mujiati Mujiati
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 10 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i10.5335

Abstract

Clean water is one of the important aspects that must be prioritized in urban planning. The higher the standard of living of the community, the need for clean water will also increase. However, the fulfillment of adequate clean water needs in Supiori Regency is still not optimal. Based on the Minister of Public Works Regulation No. 14/2010, the coverage of drinking water services in Supiori Regency is classified as poor, with a clean water service level of less than 50%. Optimization efforts are needed to optimize and distribute clean water services in Supiori Regency meet the target of clean water services and create a sustainable community life. The research method uses three types of analysis. First, the ratio of clean water services in the settlements of Supiori Regency was analyzed using a calculation method that refers to the standard of clean water needs and availability. Second, the analysis of clean water services was conducted based on community perceptions. Third, this study analyzed the factors that influence clean water services using multiple linear regression. Descriptive analysis was used to identify optimization steps. The results showed that the ratio of clean water services in South Supiori District only reached 30.38%, while in East Supiori District, it was lower, at 19.78%. Based on community perceptions, 93% of the population in South Supiori District and 75% in East Supiori District have not used the Water Supply System. Regression analysis shows that in Supiori Selatan District, factors affecting clean water services include pipe distance, community participation, and number of family members. In East Supiori District, the influencing factors are pipe distance, management, and maintenance of clean water. So, there are optimization efforts that can be done, among others, through mapping services based on regional conditions. For areas that are difficult to reach by SPAM services, the community can utilize the nearest water source to meet their clean water needs independently.
Study on Optimization of Availability and Demand for Clean Water at Regional Drinking Water Companies (PDAM) in Jayapura City Dwi Cahya Kurniawan; Mujiati Mujiati; Dewi Ana Rusim; Ira Widyastuti; Harmonis Rante
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 11 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i11.7030

Abstract

PDAM Jayapura is a government agency that operates in the field of providing drinking water services, apart from being a profit institution, it is also a social institution. PDAM Jayapura is tasked with providing clean water for the Jayapura City and Jayapura Regency areas. This research aims to identify the existing condition of the Jayapura City PDAM drinking water distribution system, analyze the availability, needs, and installed (distribution network) clean water needs in Jayapura City, and conduct an analysis of other alternatives in meeting Clean Water Needs in Jayapura City. The results of this research show that the coverage of clean water services by Jayapura City PDAM is still below national standards, using technological innovation to monitor and control the clean water distribution network system in real-time using sensor technology installed at each network point to identify and repair leaks quickly, based on the results of the planet 2.0 analysis, several parts of the pipe have very small velocities, therefore, the discharge coming out of the pipe is very small. The solution that can be made is to reduce the dimensions of the existing pipe so that the flow speed can be met and also by adding water pumps at various points that have a water speed of 0 m/s so that the water in the pipe can flow properly.
Determination Of Subsurface Aquifers and Distribution of Groundwater Table Depth in Wamena City, Jayawijaya Regency, Mountainous Papua Province Raymond Feril Hattu; Mujiati Mujiati; Duha Awaluddin; Ira Widyastuti; Dewi Ana Rusim; Bernathius Julison
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 12 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i12.8815

Abstract

This study was conducted to determine the existence of subsurface aquifers and the distribution of groundwater-surface depth in Jayawijaya Regency, Mountainous Papua Province. The background of this research is the need for optimal groundwater management in areas with high topography such as Wamena City. The method used was a geophysical survey with the Wenner-Schlumberger configuration resistivity geoelectric technique to identify the aquifer layer. Primary data was obtained through direct measurements using geoelectric devices and GPS, while secondary data was obtained from related literature. The results showed that there were free aquifers with a depth of 25-105 meters and depressed aquifers at a depth of 145-270 meters in various research locations. The distribution of this aquifer is highly dependent on local geological conditions, with the availability of groundwater quite high in some areas and minimal in other areas such as Kampung Sabulama and Wasawa. In conclusion, the resistivity geoelectric method is effective for mapping the distribution of aquifers, which can further be used as a basis for groundwater management in the study area.
Erosion Analysis With Geographic Information System On Watershed Area of Tapin Dam, South Kalimantan Yanuar A. Pratama; Ira Widyastuti; Deliana Mangisu; Davy I. R. Jansen
Journal of Civil Engineering Vol. 40 No. 3 (2025)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v40i3.9320

Abstract

Population growth in the Tapin Dam watershed area causes increasing land needs and changes in land function. Changes in land use and high rainfall can cause erosion, which causes sedimentation in rivers and shallowing of the Tapin Reservoir so that the service life of the reservoir is reduced. The importance of good land conversion management and the existence of national strategic infrastructure in the form of dams that need to be maintained for sustainability. A study was conducted to determine the value of the critical level of land and the amount of erosion in the Tapin Dam watershed. Based on the USLE formula using GIS analysis, four USLE method parameters are required, namely rainfall erosivity, soil erodibility map, land use map, and slope map. The overlay process is carried out to obtain the value of the amount of erosion to calculate the sediment transport ratio that occurs. The results of this study are the value of the erosion rate in the Tapin Dam watershed of 15,424.28 tons/ha/year and the amount of sedimentation released is 8,892,228.83 tons/year or 637.35 tons/ha/year.
Co-Authors Alfian Adie Chandra Andi Muh. M. Makkarumpa’ Bernathius Julison Davy I. R. Jansen Davy Ivan Robert Jansen Deliana Mangisu Deni handani Duha Awaluddin Kurniatullah Duha Awaludin Dwi Cahya Kurniawan Feri Antoni Ha Esdhona Juned Habel M. Arsyad Thaha Markus Sawaki Maurids Thomas Sapari Mujiati Mujiati Mukhsan Putra Hatta Mukhsan Putra Hatta, Mukhsan Putra Rante, Harmonis Raymond Feril Hattu Rita Tahir Lopa Rusim, Dewi Ana Sasmita Rusnaini Siti Rahmiati Syah Amin Albadry Tarjo Tarjo Wiji Astika, Yulia Wismar, Teta Yanuar A. Pratama