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All Journal Sondir Journal of Sustainable Technology and Applied Science Journal Innovation of Civil Engineering (JICE) Jurnal ABM Mengabdi JASTEN (Jurnal Aplikasi Sains Teknologi Nasional
I Wayan Mundra
Institut Teknologi Nasional Malang
Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Physics Social Sciences Transportation Other

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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; Mundra, I Wayan; Wedyantadji, Bambang
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 Mundra, I Wayan; 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.
Co-Authors Ardiyanto Maksimilianus Gai Aziz, Subandiyah Bambang Wedyantadji Christian Citra Megananda Dodik Prabowo Eko Usman Endro Yuwono Fadhlia Aska Aminy Ferdinand Adrianus Meka Seran Halwa Zuyyinal Ilmi Hardianto Hardianto Hirijanto Jeva Fredika Haryanto Harianto Kustamar Kustamar Lies Kurniawati Wulandari M. Faisal Ferial Mariano Jinotra, Beatus Mochammad Imron Awalludin Mohammad Erfan Muhammad Dicky Arwidyanto Munasih Nenny Roostrianawaty Neny Roostrianawaty Novita Christina Nusa Sebayang Retno Pri Anggraningtiyas Rusedie Ryanwira Adha Sitoresmi Ratnaningrum Sriliani Surbakti Vega Aditama Yulianti, Erni