Pub Date : 2021-09-09DOI: 10.13170/AIJST.10.2.19701
Rifa Alayani, S. Sugianto, H. Basri
This study aims to assess Flood susceptibility and flood hazard levels and obtain the distribution of hazard levels and flood hazards in the Woyla watershed, Aceh Province. This research design generally uses a descriptive survey method and divide into several stages, such as data collection, data processing, data presentation, and delivery of research results. Each determinant of flood-prone areas includes a land slope, altitude, soil texture, drainage, land cover, and rainfall, analyzed spatially utilizing a map. Furthermore, based on the map, the regions are described based on the values that have been divided into classes. The results showed that the level of flood vulnerability in the Woyla watershed was divided into five classes, namely; the non-vulnerable class with an area of 14.88 Ha / 0.01%, low prone with an area of 90,731.62 Ha / 35.45%, medium with an area of 57,120.35 Ha / 22.32%, high with an area of 44,918.15 Ha / 17.55%, and very high with an area of 63,151.72 Ha / 24.67%. Also obtained a map of the distribution of flood hazard areas, the Woyla watershed area is divided into five classes, namely; the very light class with an area of 179,146.15 Ha / 70.00%, mild with an area of 32,868.84 Ha / 12.84%, moderate with an area of 20,129.93 Ha / 7.87%, danger with an area of 6.007. 29 Ha / 2, 35%, and very dangerous with an area of 17,784.51 Ha / 6.95%. The level of flood vulnerability in the Woyla watershed is dominant in West Aceh Regency, which is in the very high and high category classes with a total area of 56,876.65 Ha and 23,527.40 Ha. Meanwhile, the level of flood hazard in the Woyla watershed is also more dominant in West Aceh Regency than falls into the most dangerous and dangerous class category with a total area of 17,784.51 Ha and 6,007.29 Ha. With the largest part in the very light class at the flood hazard level of 179,146.15 ha.
{"title":"Flood Rate Assessment of the Woyla River Watershed, Aceh Province, Indonesia","authors":"Rifa Alayani, S. Sugianto, H. Basri","doi":"10.13170/AIJST.10.2.19701","DOIUrl":"https://doi.org/10.13170/AIJST.10.2.19701","url":null,"abstract":"This study aims to assess Flood susceptibility and flood hazard levels and obtain the distribution of hazard levels and flood hazards in the Woyla watershed, Aceh Province. This research design generally uses a descriptive survey method and divide into several stages, such as data collection, data processing, data presentation, and delivery of research results. Each determinant of flood-prone areas includes a land slope, altitude, soil texture, drainage, land cover, and rainfall, analyzed spatially utilizing a map. Furthermore, based on the map, the regions are described based on the values that have been divided into classes. The results showed that the level of flood vulnerability in the Woyla watershed was divided into five classes, namely; the non-vulnerable class with an area of 14.88 Ha / 0.01%, low prone with an area of 90,731.62 Ha / 35.45%, medium with an area of 57,120.35 Ha / 22.32%, high with an area of 44,918.15 Ha / 17.55%, and very high with an area of 63,151.72 Ha / 24.67%. Also obtained a map of the distribution of flood hazard areas, the Woyla watershed area is divided into five classes, namely; the very light class with an area of 179,146.15 Ha / 70.00%, mild with an area of 32,868.84 Ha / 12.84%, moderate with an area of 20,129.93 Ha / 7.87%, danger with an area of 6.007. 29 Ha / 2, 35%, and very dangerous with an area of 17,784.51 Ha / 6.95%. The level of flood vulnerability in the Woyla watershed is dominant in West Aceh Regency, which is in the very high and high category classes with a total area of 56,876.65 Ha and 23,527.40 Ha. Meanwhile, the level of flood hazard in the Woyla watershed is also more dominant in West Aceh Regency than falls into the most dangerous and dangerous class category with a total area of 17,784.51 Ha and 6,007.29 Ha. With the largest part in the very light class at the flood hazard level of 179,146.15 ha.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41588122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.13170/AIJST.10.1.18749
S. Saroji, Ekrar Winata, Putra Pratama Wahyu Hidayat, S. Prakoso, F. Herdiansyah
Lithofacies classification is a process to identify rock lithology by indirect measurements. Usually, the classification is processed manually by an experienced geoscientist. This research presents an automated lithofacies classification using a machine learning method to increase computational power in shortening the lithofacies classification process's time consumption. The support vector machine (SVM) algorithm has been applied successfully to the Damar field, Indonesia. The machine learning input is various well-log data sets, e.g., gamma-ray, density, resistivity, neutron porosity, and effective porosity. Machine learning can classify seven lithofacies and depositional environments, including channel, bar sand, beach sand, carbonate, volcanic, and shale. The classification accuracy in the verification phase with trained lithofacies class data reached more than 90%, while the accuracy in the validation phase with beyond trained data reached 65%. The classified lithofacies then can be used as the input for describing lateral and vertical rock distribution patterns.
{"title":"The Implementation of Machine Learning in Lithofacies Classification using Multi Well Logs Data","authors":"S. Saroji, Ekrar Winata, Putra Pratama Wahyu Hidayat, S. Prakoso, F. Herdiansyah","doi":"10.13170/AIJST.10.1.18749","DOIUrl":"https://doi.org/10.13170/AIJST.10.1.18749","url":null,"abstract":"Lithofacies classification is a process to identify rock lithology by indirect measurements. Usually, the classification is processed manually by an experienced geoscientist. This research presents an automated lithofacies classification using a machine learning method to increase computational power in shortening the lithofacies classification process's time consumption. The support vector machine (SVM) algorithm has been applied successfully to the Damar field, Indonesia. The machine learning input is various well-log data sets, e.g., gamma-ray, density, resistivity, neutron porosity, and effective porosity. Machine learning can classify seven lithofacies and depositional environments, including channel, bar sand, beach sand, carbonate, volcanic, and shale. The classification accuracy in the verification phase with trained lithofacies class data reached more than 90%, while the accuracy in the validation phase with beyond trained data reached 65%. The classified lithofacies then can be used as the input for describing lateral and vertical rock distribution patterns.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44974456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.13170/AIJST.10.1.18752
H. Harisman, P. Stothard, N. Aflah
Gaming technology has been growing these years rapidly. The game engines have the capability of creating a very realistic virtual environment model. This technology can also be used for mining purposes. In this research, the game engine is specifically used to develop a mine self-escape simulation game for training purposes. The game engine which is used to develop the simulation game is Unreal Engine 3. The main advantage of using such a simulation game as a training tool is because it allows the trainee to experience a dangerous situation while not being put in danger. This kind of training is considered better than conventional briefing, normally conducted by showing a video or pamphlet. Studies have shown that people retain more information when they are involved interactively in the learning process. In this research, a computer simulation game as a training tool for underground coal mine self-escaped has been successfully created using fire scenarios. The player/trainee should follow some procedures to get to the safety zone.
{"title":"Developing a Computer Simulation Game as a Training Tool for Mine Self-Escape in Underground Coal Mine","authors":"H. Harisman, P. Stothard, N. Aflah","doi":"10.13170/AIJST.10.1.18752","DOIUrl":"https://doi.org/10.13170/AIJST.10.1.18752","url":null,"abstract":"Gaming technology has been growing these years rapidly. The game engines have the capability of creating a very realistic virtual environment model. This technology can also be used for mining purposes. In this research, the game engine is specifically used to develop a mine self-escape simulation game for training purposes. The game engine which is used to develop the simulation game is Unreal Engine 3. The main advantage of using such a simulation game as a training tool is because it allows the trainee to experience a dangerous situation while not being put in danger. This kind of training is considered better than conventional briefing, normally conducted by showing a video or pamphlet. Studies have shown that people retain more information when they are involved interactively in the learning process. In this research, a computer simulation game as a training tool for underground coal mine self-escaped has been successfully created using fire scenarios. The player/trainee should follow some procedures to get to the safety zone.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42479988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.13170/AIJST.10.1.17967
D. Hariadi, S. Saleh, R. A. Yamin, S. Aprilia
Nowadays, the use of plastics is inseparable from daily life activities for both industrial commercial and household needs. Every year, an average individual consumes 700 plastic bags. Furthermore, the major types of plastic pollutants are High-Density Polyethylene (HDPE) and Low-Density Polyethylene (LDPE). The nature of LDPE plastic makes it very difficult to undergo decomposition. Subsequently, efforts to overcome this problem have been carried out by several methods of processing or utilizing its waste through pyrolysis. This study aims to determine the effect of the quality of LDPE plastic waste on the plastic oil produced from the pyrolysis process. Based on their chemical compounds, all plastic oils produced were categorized as carbon compounds instead of hydrocarbons. Although, from the quality of the LDPE plastic used, the process produced gasoline, naphtha, and kerosene, the quality of each oil was different. Therefore, the higher the quality of the LDPE plastic used, the better the quality of the oil produced
{"title":"The Effect of Low-Density Poly Ethylene (LDPE) Towards Plastic Oil Quality","authors":"D. Hariadi, S. Saleh, R. A. Yamin, S. Aprilia","doi":"10.13170/AIJST.10.1.17967","DOIUrl":"https://doi.org/10.13170/AIJST.10.1.17967","url":null,"abstract":"Nowadays, the use of plastics is inseparable from daily life activities for both industrial commercial and household needs. Every year, an average individual consumes 700 plastic bags. Furthermore, the major types of plastic pollutants are High-Density Polyethylene (HDPE) and Low-Density Polyethylene (LDPE). The nature of LDPE plastic makes it very difficult to undergo decomposition. Subsequently, efforts to overcome this problem have been carried out by several methods of processing or utilizing its waste through pyrolysis. This study aims to determine the effect of the quality of LDPE plastic waste on the plastic oil produced from the pyrolysis process. Based on their chemical compounds, all plastic oils produced were categorized as carbon compounds instead of hydrocarbons. Although, from the quality of the LDPE plastic used, the process produced gasoline, naphtha, and kerosene, the quality of each oil was different. Therefore, the higher the quality of the LDPE plastic used, the better the quality of the oil produced","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45411981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.13170/AIJST.10.1.18890
S. Sarah, A. Adisalamun, D. Darmadi, Suraiya Kamaruzzaman, A. Muslim, S. Saiful
This paper proposed adsorbent development by synthesizing polyurethane foam (PUF) using a simple method, mixing polyol with isocyanate and adding fillers of bentonite and magnetite to the PUF matrix. The study's main objective was to produce a PUF-based adsorbent with high reactivity to remove Hg 2+ in wastewater. This bentonite and magnetite filler-modified polyurethane foam (BMPUF) adsorbent was fixed in a bed column for the adsorption of mercury (II) ions from an aqueous solution. The effect of initial Hg 2+ concentration on the removal rate and the effect of contact time on adsorption efficiency was investigated. Langmuir, Freundlich, and BET non-linear models were taken into account to determine the best adsorption isotherm fitting and obtain adsorption capacity, intensity, and pore volume. As a result, it followed the non-linear Freundlich model, and the average adsorption capacity and intensity were 0.466 mg/g and 0.923, respectively. The average BET-based pore volume obtained was 0.782 L/mg. The kinetics study showed that the non-linear pseudo-first-order kinetics model was more suitable for describing the Hg2+ adsorption kinetics. The maximum equilibrium adsorption capacity was 1.770 mg/g with the adsorption rate of 0.0013 min -1 based on the non-linear model. The effect of varying bentonite and magnetite ratio on adsorption isotherm and kinetics was also investigated. Overall, the potential application of BMPUF adsorbent in the adsorption of mercury (II) ions was demonstrated in the current study.
本文提出用一种简单的方法合成聚氨酯泡沫(PUF)，将多元醇与异氰酸酯混合，在PUF基体中加入膨润土和磁铁矿填料。该研究的主要目的是生产一种具有高反应性的puf基吸附剂，以去除废水中的Hg 2+。将膨润土和磁铁矿填料改性聚氨酯泡沫(BMPUF)吸附剂固定在床柱上，用于吸附水溶液中的汞离子。考察了初始浓度对Hg +去除率的影响以及接触时间对吸附效率的影响。采用Langmuir、Freundlich和BET非线性模型确定最佳吸附等温线拟合，获得吸附容量、强度和孔隙体积。结果表明，吸附量为0.466 mg/g，吸附强度为0.923 mg/g，符合非线性Freundlich模型。得到的平均孔隙体积为0.782 L/mg。动力学研究表明，非线性拟一级动力学模型更适合描述Hg2+吸附动力学。基于非线性模型的最大平衡吸附量为1.770 mg/g，吸附速率为0.0013 min -1。研究了膨润土和磁铁矿配比对吸附等温线和吸附动力学的影响。综上所述，本研究证明了BMPUF吸附剂在吸附汞(II)离子方面的潜在应用。
{"title":"Bentonite and Magnetite Filler-Modified Polyurethane Foam in Fixed Bed Column for the Adsorption of Mercury(II) Ions from Aqueous Solution","authors":"S. Sarah, A. Adisalamun, D. Darmadi, Suraiya Kamaruzzaman, A. Muslim, S. Saiful","doi":"10.13170/AIJST.10.1.18890","DOIUrl":"https://doi.org/10.13170/AIJST.10.1.18890","url":null,"abstract":"This paper proposed adsorbent development by synthesizing polyurethane foam (PUF) using a simple method, mixing polyol with isocyanate and adding fillers of bentonite and magnetite to the PUF matrix. The study's main objective was to produce a PUF-based adsorbent with high reactivity to remove Hg 2+ in wastewater. This bentonite and magnetite filler-modified polyurethane foam (BMPUF) adsorbent was fixed in a bed column for the adsorption of mercury (II) ions from an aqueous solution. The effect of initial Hg 2+ concentration on the removal rate and the effect of contact time on adsorption efficiency was investigated. Langmuir, Freundlich, and BET non-linear models were taken into account to determine the best adsorption isotherm fitting and obtain adsorption capacity, intensity, and pore volume. As a result, it followed the non-linear Freundlich model, and the average adsorption capacity and intensity were 0.466 mg/g and 0.923, respectively. The average BET-based pore volume obtained was 0.782 L/mg. The kinetics study showed that the non-linear pseudo-first-order kinetics model was more suitable for describing the Hg2+ adsorption kinetics. The maximum equilibrium adsorption capacity was 1.770 mg/g with the adsorption rate of 0.0013 min -1 based on the non-linear model. The effect of varying bentonite and magnetite ratio on adsorption isotherm and kinetics was also investigated. Overall, the potential application of BMPUF adsorbent in the adsorption of mercury (II) ions was demonstrated in the current study.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41732219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.13170/AIJST.10.1.20328
S. Prakoso, M. Burhannudinnur, T. Irano, F. Herdiansyah
Several researches have shown that P-wave velocity carries information on the complexity of the rock's pore geometry and pore structure. Their complexity can be characterized by critical porosity. Therefore, the P-wave velocity is used to estimate permeability. This research uses data taken from the Tomori formation from Banggai-Sula basin, Central Sulawesi, which is a carbonate rock reservoir. Also, this research aims to obtain a 3D permeability model by using acoustic wave velocity cube data. The results show that permeability can be modeled well using acoustic wave velocity data. Furthermore, compared to the raw data log of permeability, the modeling results using wave velocity based on critical porosity show good results. This method is another alternative to permeability modeling if acoustic wave velocity cube data is available
{"title":"Utilization of Acoustic Wave Velocity for Permeability Estimation in Static Reservoir Modeling: A Field Case","authors":"S. Prakoso, M. Burhannudinnur, T. Irano, F. Herdiansyah","doi":"10.13170/AIJST.10.1.20328","DOIUrl":"https://doi.org/10.13170/AIJST.10.1.20328","url":null,"abstract":"Several researches have shown that P-wave velocity carries information on the complexity of the rock's pore geometry and pore structure. Their complexity can be characterized by critical porosity. Therefore, the P-wave velocity is used to estimate permeability. This research uses data taken from the Tomori formation from Banggai-Sula basin, Central Sulawesi, which is a carbonate rock reservoir. Also, this research aims to obtain a 3D permeability model by using acoustic wave velocity cube data. The results show that permeability can be modeled well using acoustic wave velocity data. Furthermore, compared to the raw data log of permeability, the modeling results using wave velocity based on critical porosity show good results. This method is another alternative to permeability modeling if acoustic wave velocity cube data is available","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49386588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-04-30DOI: 10.13170/AIJST.10.1.19723
Sihem Chaib, R. Lassoued
In order to improve the fragile nature of concrete, and its low tensile strength, and with a view to giving it the desired properties, which serve to build more durable structures at less cost, the association of a self-consolidating concrete with fiber, is considered a wise combination. However, given the limited amount of research on the response of SFSCC structures, designers and engineers do not use this material with confidence. In the present work, an experimental companion was conducted, in the interest of examining, the combined effect of fibers and stirrups include low and high rate of steel fiber, on the behavior of SFSCC beams. This choice allowed working on economically viable SFSCC. Beams were made also with ordinary concrete and others with self-consolidating. Thirty-six beams were of identical cross-section 10x20cm and length of 120cm; carried out with or without longitudinal and transverse reinforcement. Before proceeding with the main part of the research program, the concrete mixtures were characterized first in the fresh state by the following tests: Slump Flow, Time Flow T500; J-Ring, L-Box, V-Funnel and Sieve stability, and then in the hardened state: compressive and tensile strengths. In the light of the results obtained, it was found that adding steel fibers to fresh self-consolidating concrete decreased its workability and fluidity, but improved its hardening properties. Subsequently, the addition of the steel fibers increased the flexural capacity of the beams significantly, and improved their ductility. Also, an addition of the steel fibers in an adequate percentage, in this case at 0.9%, made it possible to replace the shear reinforcements, and can lead to changing the mode of failure from a collapse by brittle shear, to a mechanism of ruin in ductile bending.
{"title":"Combined Effect of Low and High Rate of Corrugated Steel Fiber and Stirrups on Mechanical Performance of SFSCC Beams","authors":"Sihem Chaib, R. Lassoued","doi":"10.13170/AIJST.10.1.19723","DOIUrl":"https://doi.org/10.13170/AIJST.10.1.19723","url":null,"abstract":"In order to improve the fragile nature of concrete, and its low tensile strength, and with a view to giving it the desired properties, which serve to build more durable structures at less cost, the association of a self-consolidating concrete with fiber, is considered a wise combination. However, given the limited amount of research on the response of SFSCC structures, designers and engineers do not use this material with confidence. In the present work, an experimental companion was conducted, in the interest of examining, the combined effect of fibers and stirrups include low and high rate of steel fiber, on the behavior of SFSCC beams. This choice allowed working on economically viable SFSCC. Beams were made also with ordinary concrete and others with self-consolidating. Thirty-six beams were of identical cross-section 10x20cm and length of 120cm; carried out with or without longitudinal and transverse reinforcement. Before proceeding with the main part of the research program, the concrete mixtures were characterized first in the fresh state by the following tests: Slump Flow, Time Flow T500; J-Ring, L-Box, V-Funnel and Sieve stability, and then in the hardened state: compressive and tensile strengths. In the light of the results obtained, it was found that adding steel fibers to fresh self-consolidating concrete decreased its workability and fluidity, but improved its hardening properties. Subsequently, the addition of the steel fibers increased the flexural capacity of the beams significantly, and improved their ductility. Also, an addition of the steel fibers in an adequate percentage, in this case at 0.9%, made it possible to replace the shear reinforcements, and can lead to changing the mode of failure from a collapse by brittle shear, to a mechanism of ruin in ductile bending.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43904220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The evaluation of unsaturated soils' fundamental properties is ensured by the characteristic water retention curve for a wide range of soil suction values. However, a minimal number of research works have focused on studying the water retention properties of natural soils and treated with hydraulic binders using soil-water characteristic curves (SWCC). The present work is motivated by the lack of experimental evidence of this type. Firstly, experimental measurements of soil-water characteristic curves of a natural loam soil from the region of Sidi Bel Abbes (Algeria), treated with cement and compacted at Standard Optimum Proctor at an ambient temperature of 20 °C, Were carried out using the methods of the imposition of suction, namely the osmotic method ranging from 0 to 0.05 MPa and the method of saline solutions over a suction range from 0.05 MPa to about 343 MPa respectively. The suction used were applied to four studied mixtures (natural soil, + 2%, + 4% and + 6% cement). At the end of the tests on the drainage-humidification path, the water retention curves for the treated soil at different cement dosage allow us to determine the different state parameters of the treated soil: Degree of saturation (Sr), dry weight (d), void ratio (e) and water content (w). The suction imposition range and the cement dosage significantly influence the water behavior of the material studied. On the other hand, we develop a model of the water behavior of soils treated with cement. This model makes it possible to correctly predict the retention curves at different cement dosage from the experimental measurements performed on samples compacted at Standard Optimum Proctor represented in the plans [suction, degree of saturation] and [suction, moisture content].
{"title":"Experimental Study And Modeling Of Water Retention Curve Of A Silty Soil Compacted And Treated With Cement","authors":"Belal Tewfik, Ghembaza Moulay Smaine, Bellia Zoheir","doi":"10.13170/AIJST.9.3.17853","DOIUrl":"https://doi.org/10.13170/AIJST.9.3.17853","url":null,"abstract":"The evaluation of unsaturated soils' fundamental properties is ensured by the characteristic water retention curve for a wide range of soil suction values. However, a minimal number of research works have focused on studying the water retention properties of natural soils and treated with hydraulic binders using soil-water characteristic curves (SWCC). The present work is motivated by the lack of experimental evidence of this type. Firstly, experimental measurements of soil-water characteristic curves of a natural loam soil from the region of Sidi Bel Abbes (Algeria), treated with cement and compacted at Standard Optimum Proctor at an ambient temperature of 20 °C, Were carried out using the methods of the imposition of suction, namely the osmotic method ranging from 0 to 0.05 MPa and the method of saline solutions over a suction range from 0.05 MPa to about 343 MPa respectively. The suction used were applied to four studied mixtures (natural soil, + 2%, + 4% and + 6% cement). At the end of the tests on the drainage-humidification path, the water retention curves for the treated soil at different cement dosage allow us to determine the different state parameters of the treated soil: Degree of saturation (Sr), dry weight (d), void ratio (e) and water content (w). The suction imposition range and the cement dosage significantly influence the water behavior of the material studied. On the other hand, we develop a model of the water behavior of soils treated with cement. This model makes it possible to correctly predict the retention curves at different cement dosage from the experimental measurements performed on samples compacted at Standard Optimum Proctor represented in the plans [suction, degree of saturation] and [suction, moisture content].","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49304498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-30DOI: 10.13170/AIJST.9.3.17303
I. Burhan, A. Achmad, Putra Rizkiya, Z. Hasan
The dynamics of urban development, followed by various opportunities and challenges for different social groups, indicate a growing sense of complexity, unpredictability, and insecurity about cities and emphasis a need to identify new sustainability strategies. This paper aims at predicting the land-use change of urban coastal areas in Banda Aceh and its impact on urban sustainability. It used an urban simulation model using Cellular Automata (CA), integrated into a LanduseSIM platform. There were three main steps as part of the research methodology: (1) preparation of current data on land uses (2015), (2) simulation of data using CA in LanduseSIM software, and (3) visualization of data and result. Accordingly, the final simulation of the year 2030 was completed, in two scenarios, as the basis to evaluate the impact of land-use change on urban sustainability in Banda Aceh. The study has revealed that the current development trend in the coastal area of Banda Aceh is consuming natural resources such as wetlands and vegetation, driven particularly by the planning of urban coastal region as a center of tourism and fishery, complemented by the upcoming Banda Aceh Outer-Ring Road project. The study recommends a reconsideration of the city strategies by decision-makers to achieve sustainability and ensure ecological balance.
{"title":"Forecasting the land use change of urban coastal area in Banda Aceh and its impact on urban sustainability using LandUseSIM cellular automata simulation model.","authors":"I. Burhan, A. Achmad, Putra Rizkiya, Z. Hasan","doi":"10.13170/AIJST.9.3.17303","DOIUrl":"https://doi.org/10.13170/AIJST.9.3.17303","url":null,"abstract":"The dynamics of urban development, followed by various opportunities and challenges for different social groups, indicate a growing sense of complexity, unpredictability, and insecurity about cities and emphasis a need to identify new sustainability strategies. This paper aims at predicting the land-use change of urban coastal areas in Banda Aceh and its impact on urban sustainability. It used an urban simulation model using Cellular Automata (CA), integrated into a LanduseSIM platform. There were three main steps as part of the research methodology: (1) preparation of current data on land uses (2015), (2) simulation of data using CA in LanduseSIM software, and (3) visualization of data and result. Accordingly, the final simulation of the year 2030 was completed, in two scenarios, as the basis to evaluate the impact of land-use change on urban sustainability in Banda Aceh. The study has revealed that the current development trend in the coastal area of Banda Aceh is consuming natural resources such as wetlands and vegetation, driven particularly by the planning of urban coastal region as a center of tourism and fishery, complemented by the upcoming Banda Aceh Outer-Ring Road project. The study recommends a reconsideration of the city strategies by decision-makers to achieve sustainability and ensure ecological balance.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48687212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-12-30DOI: 10.13170/AIJST.9.3.17563
A. Azmeri, Winardi Winardi, F. Z. Jemi
Pandrah Weir, built-in 1987, serves the Pandrah Technical Irrigation Area in Bireuen District, Aceh Province, with an area of 1.203 Ha. Its old infrastructure has experienced various damage that can decrease the irrigation system performance. The Pandrah irrigation system's previous performance assessment by both the MASSCOTE approach and Rapid Appraisal Procedure (RAP) evaluation suggested a service level of 3.05 (useful classification). This study assessed the effect of the variables on the Pandrah irrigation system's performance with Structural Equation Modeling (SEM) operated by the AMOS program. The four leading indicators were irrigation service, Water User Farmers Association (P3A), operator Human Resources (H.R.), and irrigation operation modernization. The refinement of irrigation system performance analysis using SEM showed that results of the four irrigation system performance indicators, namely: 0.082 (p=0.768), 0.090 (p=0.273), 0.419 (p=0.287), and 0.606 (p=0.039) for irrigation service, P3A indicator, irrigation operation modernization, and H.R. respectively. Based on the evaluation of the four indicators of irrigation system performance, it is concluded that the Pandrah irrigation system's performance is good. This performance assessment provides a clear picture of irrigation water services, H.R., P3A being an initial assessment for priorities, planning, and scheduling to start modernization programs for irrigation system operations. Irrigation modernization aims to facilitate the operation and maintenance by improving the irrigation system. This modernization means that irrigation planning, irrigation operation, maintenance, and monitoring systems have been carefully calculated before proposing a new irrigation network. The success of monitoring activities requires the use of information technology.
{"title":"Assessing The Influence Of Pandrah Irrigation System Performance Indicators Using Structural Equation Modeling","authors":"A. Azmeri, Winardi Winardi, F. Z. Jemi","doi":"10.13170/AIJST.9.3.17563","DOIUrl":"https://doi.org/10.13170/AIJST.9.3.17563","url":null,"abstract":"Pandrah Weir, built-in 1987, serves the Pandrah Technical Irrigation Area in Bireuen District, Aceh Province, with an area of 1.203 Ha. Its old infrastructure has experienced various damage that can decrease the irrigation system performance. The Pandrah irrigation system's previous performance assessment by both the MASSCOTE approach and Rapid Appraisal Procedure (RAP) evaluation suggested a service level of 3.05 (useful classification). This study assessed the effect of the variables on the Pandrah irrigation system's performance with Structural Equation Modeling (SEM) operated by the AMOS program. The four leading indicators were irrigation service, Water User Farmers Association (P3A), operator Human Resources (H.R.), and irrigation operation modernization. The refinement of irrigation system performance analysis using SEM showed that results of the four irrigation system performance indicators, namely: 0.082 (p=0.768), 0.090 (p=0.273), 0.419 (p=0.287), and 0.606 (p=0.039) for irrigation service, P3A indicator, irrigation operation modernization, and H.R. respectively. Based on the evaluation of the four indicators of irrigation system performance, it is concluded that the Pandrah irrigation system's performance is good. This performance assessment provides a clear picture of irrigation water services, H.R., P3A being an initial assessment for priorities, planning, and scheduling to start modernization programs for irrigation system operations. Irrigation modernization aims to facilitate the operation and maintenance by improving the irrigation system. This modernization means that irrigation planning, irrigation operation, maintenance, and monitoring systems have been carefully calculated before proposing a new irrigation network. The success of monitoring activities requires the use of information technology.","PeriodicalId":7128,"journal":{"name":"Aceh International Journal of Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46109006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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