ORCID Profile
0000-0002-4873-2812
Current Organisations
University of Queensland
,
Public Works Polytechnic
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Publisher: IOP Publishing
Date: 08-2019
DOI: 10.1088/1755-1315/311/1/012009
Abstract: This research uses Resource Modelling Associate (RMA) program to conduct a two-dimension model of Agathis Lake to analyse velocity and sediment transport distribution. The main programs are RMA-10 for velocity distribution and RMA-11 for the pollutant distribution. The sediment transport focuses on total suspended solids (TSS) pollutant. The research aims to construct total suspended solid model. Firstly, RMA Generation produces mesh of Agathis Lake. Next, RMA-10 and RMA-11 would perform both velocity and TSS simulation model to represent the actual condition. This research still gives temporary result due to limited s ling data. Calibration analysis of the model is needed to make the result of the program more accurate and more representative to the real condition.
Publisher: EJournal Publishing
Date: 2018
Publisher: EDP Sciences
Date: 2019
DOI: 10.1051/MATECCONF/201927004019
Abstract: Problems about lakes are inclining every year, especially for water quality problem. Policy decisions to conserve lakes could be well achieved by data prediction. Modelling by using software could describe the future conditions of lake and give policymakers to legislate the best alternative solution. This research studies Agathis lake characteristics. The lake is situated in Universitas Indonesia, Depok, West Java, Indonesia. The research employs Resource Modelling Associates (RMA) program to simulate hydraulic and water quality data. This research will determine the most representative water s ling location and type of TSS for calibration analysis. Next, this research simulates two scenarios of lake’s conditions. The simulation is run by modelling the lake with wetland scenario and with rainy season scenario. After running several iterations, the most representative water s ling location is in the upper part of the water column and the best model of TSS is mixed TSS. Two simulated scenarios produce a reasonable result and could predict the future conditions of Agathis Lake. The research recommends that the sediment trap, that is located in the inlet of the lake, should be well-treated regularly in rainy season, and Universitas Indonesia should manage and arrange the suitable plants to be applied in the future constructed wetland.
Publisher: Universitas Islam 45
Date: 07-07-2022
DOI: 10.33558/BENTANG.V10I2.3106
Abstract: Banjir adalah masalah serius bagi banyak negara di dunia. Begitu pula halnya dengan Kabupaten Landak yang terletak di Provinsi Kalimantan Barat. Permasalahan banjir pada daerah tersebut adalah bencana bagi masyarakat lokalnya. Penelitian ini bertujuan untuk mengetahui berapa besaran debit banjir rancangan pada daerah tinjauan serta menawarkan alternatif skenario solusi permasalahan dalam mengatasi permasalahan daerah studi. Metode penelitian berupa analisis numerik dengan rumus serta bantuan aplikasi untuk menggambarkan visualisasi dari keadaan yang terjadi, dimulai dari analisis DAS, perhitungan hidrologi dan hidraulika, dan pemodelan numerik untuk visualisasi tinggi muka air menggunakan software HEC-RAS. Berdasarkan data sekunder yang diperoleh, analisis curah hujan untuk kala ulang 50 tahun menghasilkan debit banjir Nakayasu sebesar 13884,02 m³/detik. Nilai tersebut selanjutnya digunakan untuk simulasi pada aplikasi HEC-RAS. Skenario yang digunakan saat simulasi adalah dengan aliran tetap (steady flow). Hasil simulasi bermanfaat untuk menggambarkan pilihan solusi permasalahan yang akan ditentukan di akhir penelitian.
Publisher: Universitas Sultan Ageng Tirtayasa - Fakultas Teknik
Date: 11-06-2020
Publisher: MDPI AG
Date: 09-02-2021
Abstract: Coronavirus disease 2019 (Covid-19) has been identified as being transmitted among humans with droplets from breath, cough, and sneezes. Understanding the droplets’ behavior can be critical information to avoid disease transmission, especially while designing a device deals with human air respiratory. Although various studies have provided enormous computational fluid simulations, most cases are too specific and quite challenging to combine with other similar studies directly. Therefore, this paper proposes a systematic approach to predict the droplet behavior for coughing cases using machine learning. The approach consists of three models, which are droplet generator, mask model, and free droplet model modeled using feedforward neural network (FFNN). The evaluation has shown that the three FFNNs models’ accuracies are relatively high, with R-values of more than 0.990. The model has successfully predicted the evaporation effect on the diameter reduction and the completely evaporated state, which can be considered unlearned cases for machine learning models. The predicted horizontal distance pattern also agrees with the data in the literature. In summary, the proposed approach has demonstrated the capability to predict the diameter pattern according to the experimental or previous work data at various mask face types.
Publisher: EDP Sciences
Date: 2018
DOI: 10.1051/MATECCONF/201819505008
Abstract: Flooding in Jakarta is a common phenomenon that is caused by climate changes. One of the government’s actions is building polders in Jakarta to prevent the flooding. However, these polders seem to not significantly affect it. This research aims to analyse Ancol Polder in North Jakarta as flood prevention infrastructure. This research uses Muskingum Cunge and O’Donnel and Muskingum Extended methods to analyse the hydrographs. This research analyses the performance of channel capacity by HEC-RAS modelling approach and observes its stabilization using GeoStudio 2012. The existing condition of the channel still accommodates the maximum outflow that enters the stream. Furthermore, its stability is safe in all of the reviewed STA in Pademangan Timur channel.
Publisher: EDP Sciences
Date: 2018
DOI: 10.1051/MATECCONF/201814706005
Abstract: Jakarta has 10.2 million inhabitants. It has thoughtful problem about clean water availability. Today, only 54% of clean water availability could be supplied to citizens in Jakarta. The urgent need of new clean water resources is highly demanding for Jakarta future life. By employing abundant sea water in the northern part of Jakarta, desalination is a highly effective way that has been proven through value engineering. A conceptual design of desalination project is completed through FAST diagram and benchmarking method. According to life cycle cost analysis, it results IRR 13%, net product value Rp3.782 trillion, payback period of 13.39 years, and benefit cost ratio of 3.00. To make this project complete and reasonable, the public-private partnership should be conducted for modal sharing. This research piloted four analyzed scenarios. The best alternative scenario makes the government budget 60% for initial cost, spend half for operational and maintenance cost, and obtain 20% from the whole project revenue.
Publisher: IOP Publishing
Date: 2020
DOI: 10.1088/1755-1315/423/1/012016
Abstract: Climate change triggers a vulnerable level of a watershed. The assessment of watershed was conducted in rivers in Indramayu. Indramayu has terrible water quality due to several factors. The research aims to state the vulnerability level of Indramayu sub-watershed. The research analyzed several locations: Cimanuk sub-river and Muara Kali Prajagumiwang. The river health and vulnerability were assessed according to physical, land use, and water quality indicators in rivers. The other indicators are proposed according to the previous studies to enrich the future study result. The study finds out the possible future indicators: watershed landscape, hydrology, stream geomorphology, aquatic habitat, and biological conditions. The research uses a watershed vulnerability sequential analysis to obtain the result. The study analyzes the parameter, problems, and triggering factors from the sites. The assessment of stream corridor involves the rare species, sensitive fishes, macro-invertebrates availability, fish movement, normalization, water quality, river-land interaction, water spring, and geomorphology. The research concludes that rivers in Indramayu indicate fair and restorable impacted sub-watershed characteristics. This condition indicates that the streams have bad water quality, but they still could support a sustainable environment if it restored.
Publisher: IOP Publishing
Date: 10-2019
DOI: 10.1088/1757-899X/650/1/012056
Abstract: Flooding in urban areas is a common phenomenon in megacities due to the high population and settlement growth. Lack of knowledge from urban societies triggers them to intervene in the capacity of the river for housing. This impact affects various disasters, both quality and quantity of water. Kali Belik experiences flooding every year, although several solutions have been installed to mitigate, for ex le, Embung. Integrated multimodal disaster mitigation management is proposed to solve the problems and answer the research gaps. The preliminary research only focuses on flood analysis. The analysis uses 2-D modeling with HEC-RAS. The study concludes that the main factor of flooding in the research area is decreasing river capacity due to social behavior. Further research would be conducted to obtain a comprehensive understanding and solution by involving the government, academics, and society.
Publisher: AIP Publishing
Date: 2022
DOI: 10.1063/5.0093860
Publisher: IOP Publishing
Date: 03-2018
Publisher: Institute of Research and Community Services Diponegoro University (LPPM UNDIP)
Date: 20-08-2021
DOI: 10.14710/MKTS.V27I1.26404
Abstract: Low awareness of sanitation of urban citizens creates negative effects on the environment which varied. The triggering factors of the phenomenon are education and conservation technology. A conservation technology, eco-technology e.g. constructed wetlands, is proposed to solve the problem. Laboratory work is conducted to obtain comprehensive analysis about floating constructed wetland. The research paper aims to illustrate the efficiency performance of constructed wetlands, with domestic species, in the lab-scaled area from urban wastewater. The constructed wetland media is prepared horizontally. The analysis of its performance leads to a discussion of urban water quality. S lings and laboratory tests are conducted to examine pH, phosphorus, nitrogen, suspended solids, conductivity, COD, and BOD. The benefit of Nasturtium officinale as FTW media reduce phosphate, nitrate, and BOD as 100% in 14 days. The discharge simulation during 14 days reduce TDS and TSS as 100%.
Publisher: Springer Nature Singapore
Date: 19-07-2022
Publisher: EDP Sciences
Date: 2020
DOI: 10.1051/E3SCONF/202020001004
Abstract: Flooding is an obstacle for water infrastructure which installed in a river system in Ciliwung, West Java, Indonesia. The climate change triggers unpredictable rainfall which occurs in the watershed, therefore the vulnerability of river and other infrastructures are alarming. The rehabilitation and maintenance strategies are needed to make water infrastructures in the river system obtain lower damage. The research aims to simulate the 2-D HEC-RAS modelling of river system and stability. The result produces the water level of the river even in 1000-year discharge flood. Also, the research proposes the earth embankment dam for flood reduction in the watershed. The dam is designed according to the ideal condition. The simulation of HEC-RAS shows that the river experiences flooding in a certain condition. Besides, the research concludes that designed dam could overcome the flooding problem and suitable strategy for water infrastructure maintenance towards flooding impacts. Further investigation towards soil data for designed dam should be further analyzed to obtain better and comprehensive understanding.
Publisher: LPPM Universitas Malikussaleh
Date: 02-10-2021
Publisher: Routledge
Date: 16-03-2023
Publisher: LPPM Universitas Malikussaleh
Date: 06-09-2020
Publisher: Trans Tech Publications, Ltd.
Date: 07-2016
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.845.30
Abstract: The development of the construction that changes land use has resulted the decreasing of infiltration and erosion and the increasing of the sedimentation. So, the floated sediment in the river of Bah Bolon can interfere the performance of turbines of Microhydro Power Plant (MHP). The planning of sediment harvesting media requires data of total amount of sediment transport that occurs in the River of Bah Bolon. So the "The Analysis of Sediment Transport in River of Bah Bolon" needs to be done. Based on secondary data, there are two s les in this study. Sediment transport analysis using three methods, namely Yang Method, Method of Engelund and Hansen, and Bagnold Method. The analyzes show the results of the amount of sediment transport. In the first s le, the results of that three method analysis respectively are 1041.23 tons/year 12.60 tons/year, and 241.63 tons/year. In the second s le, the results of the three method analysis respectively are 1210.36 tons/year 11.49 tons/year and 241.63 tons/year. The results were compared with the results of the calculation of Intan (2015) to conclude what method that is best applied in Bah Bolon River. By ratio analysis, Yang Method is the best method compared to other methods that analiyze the total sediment transport in the Bah Bolon River. The author is not recommend using Bagnold Method or Engelund and Hansen Method to calculate the amount of sediment transport in Bah Bolon river.
Publisher: Universitas Islam 45
Date: 07-01-2022
DOI: 10.33558/BENTANG.V10I1.2692
Abstract: Engineering modeling is becoming a trend and important because it can simulate a variety of decision scenarios to be applied in the field. With limited facilities and technology, 1-D modeling in hydraulics for flood mitigation is still a trend today. What are the weaknesses of this model and how is the prediction of future modeling trends? This study analyzes the flood modeling of the Tuntang River with the 1-D model using HEC-RAS to analyze the condition of the existing water level profile and flood mitigation scenarios with normalization. The results of the analysis show that the 1-D model can describe conditions in the field and scenarios clearly. However, the 1-D model has limitations because it cannot carry out simulations that consider aspects of construction costs, time, and budget allocation of stakeholders to determine the priority scale of disaster-affected areas. It requires a vulnerability analysis with field observations, 2-D or 3-D modeling, and the application of value engineering to optimize flood control strategies. With the advancement of technology, this trend is predicted to be something that will be done in the future.
Publisher: Author(s)
Date: 2018
DOI: 10.1063/1.5054474
Publisher: IOP Publishing
Date: 08-2019
Publisher: IOP Publishing
Date: 09-2021
DOI: 10.1088/1755-1315/847/1/012003
Abstract: The vulnerability to flooding becomes a concern in every region to optimize the mitigation strategy, hence the disaster impact can be reduced from the environment. What factors become the main triggering issue toward water-related disasters? Every region has a different answer. Can a river that does not have historical flood events become vulnerable to flood today? This study investigates the flooding factors in Ngancar River, Wiroko Temon sub-watershed, Wonogiri. The research employs hydrological and hydraulics analysis. The results reveal that Ngancar River experienced land-use changes over time which lead to the dynamic of the discharge return period being bigger. As a result, river capacity today cannot accommodate the flooding volume. The research concludes that the hydraulics condition needs to be improved for flood mitigation. Further hydrological analysis is suggested to be conducted.
Publisher: IOP Publishing
Date: 04-2021
DOI: 10.1088/1755-1315/724/1/012036
Abstract: Restoration of sub-watershed needs a comprehensive point of views because the climate change factors could affect any environment aspects inside it. The paper investigates the Belik River sub-watershed in Yogyakarta, Indonesia. The research aims to analyze the characteristics of the river in the study area and to assess its vulnerability level. The observation employs HEC-RAS supporting tool to simulate 1-D frames of the river to visualize the characteristics of the river. Then, the vulnerability level is evaluated by field survey to conclude the restoration strategy in the sub-watershed. There are two findings in this research: first, the river has a high level of vulnerability to the water-related disaster and second, the sub-watershed is classified as high-risk level of the endangered environment. Hence, the proposed restoration strategy is compulsorily needed to mitigate and to rehabilitate the sub-watershed. To conclude, the Belik River sub-watershed could be categorized as a red zone of high-risk level towards environmental vulnerability to flooding, contaminants, aquatic habitat, and social prosperity.
Publisher: Lembaga Penelitian dan Pengabdian kepada Masyarakat ITS
Date: 09-03-2021
Publisher: Insight Society
Date: 18-12-2019
Publisher: Institute of Research and Community Services Diponegoro University (LPPM UNDIP)
Date: 29-12-2017
DOI: 10.14710/MKTS.V23I2.15981
Abstract: One of the worst problem in Bojonegoro is flood. This research aims to know the factor that could become the factor of flood in Bojonegoro. Besides that, this research analyses the planning of transportation river design in Bojonegoro. Flood discharge analysis uses Nakayasu synthesis unit hydrograph for period of 5 years, 10 years, 25 years, 50 years, and 100 years, then they would be compared to the water maximum capacity that could be loaded by the river. According to the analysis result, Bengawan Solo River in Bojonegoro could not able to load flood discharge from Nakayasu synthesis unit hydrograph analysis for all periods. The result conclusion that captured by HEC-RAS application has the same idea. It shows flood water surface is more than full bank capacity elevation. For river transportation design planning, according to analysis of parameter of depth, width for one and two lanes, turning basin and its depth, the ship design that recommended to ship in the Bengawan Solo River in Bojonegoro are cargo ship and passenger ship with draft of 0.6 m and LOA of 18 m, or the capacity of a passenger ship is 70 people.
No related grants have been discovered for Rian Mantasa Salve Prastica.