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All Journal Student Journal Gelagar Sondir Journal of Sustainable Technology and Applied Science Jurnal Infomanpro Jurnal ABM Mengabdi
Hirijanto
Institut Teknologi Nasional Malang
Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Social Sciences Transportation

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Journal : Journal of Sustainable Technology and Applied Science

 1 
INFILTRATION WELLS ALTERNATIVES TO REDUCE WATER PUDDLE IN LOWOKWARU DISTRICT, MALANG CITY Hirijanto Hirijanto; I Wayan Mundra; Bambang Wedyantadji
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 2 No. 1 (2021): Journal of Sustainable Technology and Applied Science, May 2021
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v2i1.3018

Abstract

Surface waters give a plentiful supply of waters ready to be utilized for residence, farmland, fishery, industry, and electric generating machine, and most importantly, to deal with the problem of water scarcity (crisis). Rain is one of the hydrological cycles that help to preserve groundwater (shallow groundwater). During the rainy season, most waters go directly to the river and the sea without processing, creating inundations and flood in some places. Water resources, however, begin to lose their supporting capacity. Water supply is no longer balanced with the demand that starts to bulge up excessively. This disrupted balance is indicated by many critical lands that are less productive and incapable of absorbing waters to the ground. Considering this outline, the implementation of environmentally friendly infiltration wells can be a strategic option to solve the water balance issue. Some alternatives of infiltration wells are proposed as the solution to the problem that this research deals with. It is estimated that these wells can reduce 10%-15% of surface runoff rate in Lowokwaru District of Malang City, especially around Soekarno-Hatta Street that always leaves massive water puddle, especially during the rainy season. This research gives the relevant institutions and user community information about drainage construction, drainage network, and land use above drainage network. Through this information, it is expected that the follow-up can be given efficiently to produce an optimum and effective drainage network. Community participation, therefore, is needed to maintain the benefits of alternative infiltration wells to ensure their sustainability in the future.
SYSTEM DYNAMICS FOR SIMULATION MODEL OF MATERIAL COST IN WATER RECOURCES PROJECT I Wayan Mundra; Hirijanto Hirijanto
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 1 No. 2 (2020): Journal of Sustainable Technology and Applied Science, November 2020
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v1i2.3027

Abstract

Project cost is one of the constraints in the achievement of a construction project. Limitation on projects financing require more realistic and efficient cost analysis in preparation of project. Due to changes in projects planning over time, it is usually difficult to predict the future project cost. So, we need an integrated system and give an efficiency for the planner. Project cost consists of cost components which is there are an interrelationship each other’s and influencing the overall cost of the project. The approach using system dynamic is one of the best solutions to identify the causal relationship between cost components by using software tools Ventana Simulation (Vensim) to facilitate the identification of causal relationship (causatic diagram) and mathematical equations between variables in stock flow diagram. The results of system dynamic approach show that the simulation model can be used to predict/ estimate the project’s cost in the coming years. Verification and validation of simulation model is eligible based on the value of means comparison, E1 = 0.32% < 5% and % error variance, E2 = 3.19% < 30% so the developed model can be done scenarios for changes that occur on the system according to the user needs.
ESTIMATING GEOELECTRIC FOR THE CLEAN WATER NECESSITY PREDICTION (CASE STUDY: ABDUL RACHMAN SALEH AIRPORT MALANG) Hirijanto Hirijanto; Endro Yuwono; Annur Maaruf
Journal of Sustainable Technology and Applied Science (JSTAS) Vol. 3 No. 1 (2022): Journal of Sustainable Technology and Applied Science, May 2022
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat, Institut Teknologi Nasional (ITN) Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jstas.v3i1.4771

Abstract

Abdul Rachman Saleh Airport of Malang plays a significant role for the air transportation in Malang and its surrounding. The services provided in Malang Abdul Rachman Saleh airport are expected to be the alternative solution to the high number of prospective passangers in Juanda Airport. However, it gives an impact in the sense of the high public interest of utilizing Abdul Rachman Saleh Airport in Malang. Increasing airport service activities requires the fulfillment of supporting facilities and infrastructure, including raw water supply. Upon critical condition such as a sudden damage, it only relies on the PDAM Malang regency water suppy and in the long run, it is prone to face water shortages. Therefore, it is required to have a pure water supply with raw water need analysis, raw water necessity estimation, and also the exploration for potential water resources that can be used as clean water supply provider at Abdul Rachman Saleh airport. The geoelectric method was used to explore the potential groundwater supply through a layer feature beneath the surface and the possibility of groundwater and minerals at a certain depth. Investigations related to topographic, physiographic, geomorphological, geological and hydrogeological conditions were carried out to analyze the potential for underground water around the Abdul Rachman Saleh airport area. Several location points were surveyed and measured to determine estimates of the availability of groundwater that were detected. The results of the analysis show that there is potential for groundwater availability at three locations around the airport area which can be used as raw water reserves to meet the needs of clean water supply which is predicted to reach 0.9 liters / second in 2036. As a raw water reserve, the need for clean water for Abdul Rachman Saleh airport Malang services is predicted to be fulfilled.
Co-Authors Akhmad Dwi Prasetiya Annur Maaruf Annur Ma’ruf Bambang Wedyantadji Endro Yuwono Endro Yuwono Fahrudin Adi Hery Setyobudiarso I Wayan Mundra Kustamar Lies Kurniawati Wulandari M. Faisal Ferial Nenny Roostrianawaty Neny Roostrianawaty Sudirman Indra