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Geostatistics application for sand mapping development in hilly area of Sabah, Malaysia

AIP Conference Proceedings 2021年第1期2339卷

作者： M. R. Taharin M. N. Norizan 1Civil Engineering Program Faculty of Engineering Universiti Malaysia Sabah Sabah Malaysia 2School of Microelectronic Engineering Universiti Malaysia Perlis Pauh Putra Campus 02600 Arau Perlis Malaysia 3Center of Excellence Geopolymer and Green Technology (CeGeoGTech) Universiti Malaysia Perlis Perlis Malaysia

The town area in Kundasang, Sabah, was facing soil mass movement, due to the low cohesion values and high angle of internal friction values. These significant soil properties are showing that the soil in this area might have a high percentage of the granular soils, mainly sand. This paper is showing the determination of sand percentage in this area by using Geostatistics, specifically on semivariogram and Ordinary Kriging, according to each layer with two meters depth intervals. Semivariogram models such as circular, spherical, exponential, and gaussian will be applied, and the lowest value of performance indicator, which is Root-Mean-Square-Error (RMSE) would be selected as the most accurate model, with the mapping of the sand percentage as an outcome.

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Home occupants awareness toward Green building: Greenship rating index application

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AIP Conference Proceedings 2021年第1期2447卷

作者： Maranatha Wijayaningtyas Kukuh Lukiyanto 1Civil Engineering Department National Institute of Technology Malang Jl. Bendungan Sigura-gura No. 2 Malang Indonesia 65145 2Entrepreneurship Department BINUS Business School Undergraduate Program Bina Nusantara University Araya Mansion 8-22 Malang Campus Indonesia 65154

Many real estate developers use the term “green” as a marketing gimmick. The developers assume that providing housing with a green building concept can attract consumers to buy the housing offered, and it turns out that this strategy is successful. As a result, the purpose of this research is to determine residents’ awareness of the green building concept and its application in their homes. This research is quantitative research with a survey method. This is done by distributing questionnaires to residents in “green” housing, and there were 325 respondents obtained in this study. The understanding of residents is measured based on the Greenship criteria, a rating tool from the Green Building Council Indonesia for green building certification in Indonesia. According to the findings, residents’ awareness of the parameters of green buildings in their homes was focused primarily on appropriate site development, water conservation, and building environmental management. Moreover, as many as 40% agree that the residence has a green concept. Meanwhile, 50% said they disagreed, and the rest were still in doubt. Therefore, it needs support and cooperation between the government, developer associations, and housing developers to understand the importance of green buildings to succeed in sustainable development goals in Indonesia.

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Safety audit of becakayu toll road

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IOP Conference Series: Materials Science and engineering 2020年第1期1007卷

作者： Ni Luh Putu Shinta Eka Setyarini Aniek Prihatiningsih Kevin Tanes Lecturer of Undergraduate Civil Engineering Study Program Universitas Tarumanagara Jl. Letjen S. Parman No.1 Jakarta Undergraduate of Civil engineering Study Program Universitas Tarumanagara Jl. Letjen S. Parman No.1 Jakarta

Road Safety Audits are an effort to recognize the possible accident Hazards from road infrastructure in traffic and the surrounding environment. Data from this audit was obtained by direct observation on the BECAKAYU toll road. Matters reviewed in this road audit are included: geometric, pavement, markings, signs, and complementary structures. This toll road connected the cities of Bekasi - Cawang - Kampung Melayu. The purpose of this study is to analyze the road's geometric, pavement, the street furniture and complementary structures of the toll road with a field survey to find out what need to recomend or added. The data obtained in this study will be compared with government regulations, whether they have accorded the regulations or not.

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Evaluating the effect of roof type variations on the quality of rainwater runoff for rainwater harvesting development

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AIP Conference Proceedings 2020年第1期2230卷

作者： Nike Dwi Wahyuningsih Nyoman Suwartha Djoko M. Hartono Mochamad Adhiraga Pratama 1Environmental Engineering Study Program Department of Civil Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok Depok 16424 Indonesia

Rainwater harvesting is the local collection of rainwater and its storage using various technologies, with the aim of using it to meet water needs in human activities. The factors that affect the quality of rainwater runoff in the rainwater harvesting system are the rainwater harvesting components and external factors, such as climatological conditions that include the intensity of rainfall and dry days. This study aims to analyze the quality of rainwater runoff from various types of roof, the influencing factors, and the potential utilization of rainwater runoff in residential–industrial areas. Three types of full-scale roofs—asbestos, clay tile, and galvanized zinc—were observed. Rainwater runoff was sampled from each type of roof using a composite method. The Mann–Whitney test and Spearman's correlation coefficient were used to determine the significance of the factors that influenced the quality of the rainwater runoff and the relationships of each factor to the quality of rainwater runoff, respectively. The results revealed that internal factors, such as type of roofing material and slope of the roof, have a significant influence on the quality of rainwater runoff, while a high intensity of rainfall and long dry periods, as external factors, caused higher concentrations of contaminants in rainwater runoff. Though some parameters of rainwater runoff met quality standards, it is recommended that a simple water treatment unit be installed to ensure clean water for sanitation needs.

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Emission inventory of HC and CO of heavy construction equipment by using NONROAD engine modelling for toll road project in Indonesia

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AIP Conference Proceedings 2020年第1期2296卷

作者： Apif M. Hajji Bambang Supriyanto Aisyah Larasati 1Department of Civil Engineering the State University of Malang Indonesia 2Industrial Engineering Study Program the State University of Malang Indonesia

Indonesia's infrastructure project, particularly toll road projects provide mobilization services to hundreds of millions of workers, including infrastructure supporting functions such as road utility services, road maintenance, and road landscaping. To successfully bring these functions, the infrastructure authorities have to uphold an armada of heavy duty diesel (HDD) equipment including excavators, bulldozers, motor graders, pavers, and compactors. This HDD equipment consumes diesel fuel and therefore releases large quantities of pollutants, including hydrocarbon (HC) and carbon monoxide (CO). In order to manage this emission effectively, an emissions inventory should be made first. The purpose of this study is to propose an inventory technique of emissions from the equipment fleet for toll road project in Indonesia from a by developing HC and CO emissions inventory which can be used as a management backing tool to minimize the environmental impact of the project. The sample case for this proposed technique is Rembang-Pasuruan Toll Road Project Section II in East Java, Indonesia, which utilizes 9 excavators, 2 bulldozers, 2 compactors, 1 motor grader, and 1 paver. By using emission factors from nonroad engine modeling developed by Environment Protection Agency (EPA), it is obtained that the average emission of HC is approximately 29.13 gr/hr or 233.05 gr/day, and the average emission of CO is about 124.94 gr/hr or equals to 999.52 gr/day.

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Optimization of infrastructure planning on waste management in Sragen by using linear programming model

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AIP Conference Proceedings 2019年第1期2114卷

作者： Albert Pramono Soesanto Mochammad Solikin Purwanti Sri Pudyastuti Nurul Hidayati 1Civil Engineering Posgraduate Program Universitas Muhammadiyah Surakarta Surakarta Indonesia

The government as the policy maker has responsiblity to make optimized infrastructure planning on waste management by considering several priorities on the purpose. This research aims to identify to what extent the infrastructure planning on waste management optimization is in accordance with the medium-term goal of Sragen governmental agency. The research method used in this study is descriptive quantitative research by using secondary data. This research applies a linear programming model to meet the optimization of infrastructure planning on waste management in Sragen until the year 2026. The aim of this optimization is to minimize the continual operational and maintenance budgets in accordance to waste management regulation in each sub-district of Sragen. Based on the proposed model of infrastructure planning on waste management, in the year 2026 it is projected that the number of population is 870,221 and the quantity of waste production is 2,393 m3 a day; which means that 450 units of dump carts, 8 units of waste-carrying motorcycles, 18 units of containers with 6 m3 capacity, 31 units of temporal dumps, 46 units of 3R waste handling, 12 units of armroll trucks, and 63 units of dump trucks with 10 m3 capacity are needed. The operational and maintenance budgets cost Rp. 30,300,580,120 a year.

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Revealing the potential of extracted Tamarindus indica seed as a biocoagulant for aquaculture wastewater treatment: Effect of solvent type, concentration, dose, and toxicity assessment

Results in Engineering

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Results in engineering 2025年 27卷

作者： Setyo Budi Kurniawan Azzahra Aulia Haya Thin Soedarti Eko Prasetyo Kuncoro Łukasz Sługocki Kacper Nowakowski Peer Mohamed Abdul Muhammad Fauzul Imron Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia UKM Bangi Selangor 43600 Malaysia Research Center for Environment and Clean Technology National Research and Innovation Agency (BRIN) Jakarta Pusat 10340 Indonesia Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Campus C UNAIR Jalan Mulyorejo Surabaya 60115 Indonesia Department of Biology Faculty of Science and Technology Universitas Airlangga Campus C UNAIR Jalan Mulyorejo Surabaya 60115 Indonesia Department of Hydrobiology Institute of Biology University of Szczecin Wąska 13 Szczecin 71-715 Poland Center of Molecular Biology and Biotechnology University of Szczecin Wąska 13 Szczecin 71-715 Poland Sanitary Engineering Section Department of Water Management Faculty of Civil Engineering and Geosciences Delft University of Technology Stevinweg 1 CN Delft 2628 The Netherlands

Aquaculture wastewater contains high levels of organic matter and nutrients, which can be harmful to aquatic life if discharged improperly into surface water bodies. Coagulation-flocculation is currently the best practice for treating aquaculture effluent with biocoagulants, offering an alternative to metal-based coagulants. This study aims to investigate the potential of Tamarindus indica seeds as a biocoagulant for treating aquaculture wastewater, focusing on the optimal solvent extraction, concentration, and dose. This study also examines the toxicity of biocoagulants to aquatic organisms. Coagulation-flocculation study was conducted under jar test experiment with NaCl, NaOH, and HCl used as solvents; concentration of 0-10 g/L; and doses of 1-5 % v/v under 120 rpm (rotation per minute) rapid mixing for 1 min, 20 rpm slow mixing for 20 mins, and 60 mins sedimentation time. A characterization study showed that NaCl-treated T. indica has a positive zeta potential charge, attributed to the presence of hydroxyl, carbonyl, and amide functional groups. Under this optimum condition (NaCl-extract, 6 g/L, and 4 % v/v), the biocoagulant achieved high removal (>50 %) of turbidity, TSS (total suspended solid), and ammonia and considerably good removal of other parameters (TN [total nitrogen], BOD 5 [biological oxygen demand], COD [chemical oxygen demand]). The toxicity test revealed that no mortality was observed at a concentration of 1 g/L, whereas 10 g/L resulted in a 100 % mortality rate after 24 hours of exposure. Further toxicity analysis is suggested to be conducted using treated final effluent (not directly using biocoagulant substances) to observe the direct impact of the treated wastewater if discharged into the water bodies.

关键词： Aquaculture Biocoagulant Coagulation Effluent Environmental pollution Flocculation

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The use of remote sensing in mining prospecting in Situbondo, East Java, Indonesia

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AIP Conference Proceedings 2020年第1期2278卷

作者： Januar Fery I Haeruddin Nur Faizin Siti Aminah Fanteri Aji D. S. F. X. Kristianta 1Study Program of Mining Engineering Civil Engineering Department Faculty of Engineering University of Jember Indonesia 2Mechanical EngineeringDepartment Faculty of Engineering University of Jember Indonesia

Mineral resources of a region are development assets and are one of the essential capital of development as well as the source or potential of wealth in the area. To make the right use for the welfare of the community, there is a need for proper identification of types, positions and reserves, excavation, and management. Therefore, to manage the mine deposit, especially industrial minerals, an area needs to be mapped to reveal mining resources concerning the type, size, and position of deposits in a field. The purpose of the study was to determine the potential for the dissemination of mining excavations in Situbondo Regency. The research method used remote sensing with guided techniques based on data in the field and geological maps. Based on remote sensing results, it was found that there were 5 minerals in Situbondo Regency. The excavated materials are sand, limestone, trass, mountain rock, and phosphate.

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The Indonesia high-speed train traveler preference analysis (case study: Jakarta-Bandung)

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AIP Conference Proceedings 2020年第1期2227卷

作者： Tri Tjahjono Andyka Kusuma Nuryani Tinumbia Ahmad Septiawan 1Department of Civil Engineering Faculty of Engineering Universitas Indonesia Kampus UI Depok Indonesia 2Study Program of Civil Engineering Faculty of Engineering Universitas Pancasila Serengseng Sawah South Jakarta Indonesia

This study assesses the potential passenger preference of the High-Speed Train infrastructure, which connects Jakarta – Bandung. The study aims to understand the potential HST passenger travel characteristics, which is important in predicting the HST demand. This study conducts a roadside interview using a stated preference methodology for several transport modes passenger serving Jakarta-Bandung, namely; private vehicle, train, intercity bus and paratransit. Moreover, the study extends in observing the short trip passenger preference. The analysis defines that the preferred fares are 300.000 (20 USD), which is increased compared to 2016 studies. The forecasting results of the demand for fast trains based on the probability of modal transfers amounted to 54,764 passengers per day with details of the number of trips Jakarta-Bandung was 27,005 while the Bandung-Jakarta trip was 27,759. The results for a significant difference between the total daily trips of Bandung-Jakarta and Jakarta-Bandung have already been seen since the initial statistical analysis where according to survey data, people who travelled Bandung-Jakarta were more elastic compared to Jakarta-Bandung trips. This finding shows clearly that the passenger traffic vehicle capitulates with the current road traffic highway conditions. Note that they are more uncertainty in condition on road traffic in comparison to the railway passenger. In more details, sensitivity analysis indicates that the passenger from Jakarta is more comfortable to shift using the HST compared to the passenger from Bandung. There is an indication that the Jakarta people have a higher value of time as they have a higher preference to shift toward faster transport mode compared to Bandung people. This information is also useful for operation policy, including ticketing differentiation based on the travel time period and travel origin-destination.

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Flood control simulation for disaster management in Wai Batu Merah River Basin

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IOP Conference Series: Earth and Environmental Science 2022年第1期989卷

作者： D Fitriani M Farid H Mahfudz Y Suryadi Water Resources and Management Study Program Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jl. Let. Jend. Purn. Dr. (HC) Mashudi No.1 Jatinangor Center for Water Resources Development Institute for Research and Community Services Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung Water Resources Engineering Research Group Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung Center for Coastal and Marine Development Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung

Ambon City, located in Maluku Island, experiences flood disaster every year. It has been considered that the flood in this city occurs more often compared to the other city in the same island. One of the river that is related to the flood occurrence in Ambon City is Wai Batu Merah River. This study aims to find appropriate structural measurement by using modelling simulation to control flood disaster in Wai Batu Merah River Basin. The modelling used HEC-RAS 5.0.7 software for coupled 1D and 2D hydraulic simulation. Flood discharge was calibrated by applying flood event in 2013. The SCS method was selected to generate flood hydrograph by using synthetic method. The records of water depth in the flood event were compared to the hydraulic model results and it showed good agreement. Based on the model, flood control scenarios i.e. normalization and dike were exercised for 25 year return period as required by government regulation. The combination of both scenarios can manage flood in Wai Batu Merah River Basin effectively. However it might need high cost to construct the structures. Therefore, it is necessary to have priority between the scenarios.

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