bluuebunny/crossref_metadata_2025_split huggingface dataset:
Forensic investigation of Gumbasa irrigation main canal damage due to large-scale flow liquefaction in Sibalaya caused by the 2018 Sulawesi Earthquake
Authors: Nurdin S , Arsyad A , Marhum F A , Setiawan H 
Published: December 2021

Abstract
This study conducted an extensive soil investigation in the Sibalaya liquefaction area to identify the Gumbasa main canal’s damage triggered by flow liquefaction. Several field tests and trenches with approximately 4 m were excavated to observe liquefied soil layers directly near the canal. A borehole, standard penetration test, and multichannel analysis surface waves (MASW) were performed beside the trench to obtain each layer’s penetration resistance. This research aims to understand the landslide’s whole aspect. The ground movements were analyzed by using satellite photos before and after the earthquake. The displacement of the main canal, the typical damage inventory, and the proposed reconstruction of the main canal are the focus of this study. As a result of the forensic investigation, the liquefied layers and debris flow contributing to the massive landslide were identified to impact the primary canal. The typical damage of the canal was due to surface rupture that occurred both horizontally and vertically. A solution for reconstructing the main canal is to use a flexible pipe canal structure. That will be resilient to future earthquake and ground movements, stabilize the ground downslope of the existing canal to limit the risk of future lateral movement in future earth tremors.
Identification of Flood-prone Areas using HEC-HMS and HEC-RAS, the Case of Ciberang River Basin, Lebak District of Banten Province
Authors: Ynaotou  , Jayadi R , Rahardjo A P , Puspitosari D A 
Published: December 2021

Abstract
It is common practice that flood hydrograph simulations help to provide better flood prediction and flood damage reduction planning. These efforts require information on flood-prone areas identification from the hydrological and hydraulic analysis results. Historically, the Ciberang River Basin has experienced floods. Those floods cause the loss of human life and damage some houses along the river’s channels, especially in Lebak District, Banten Province, Indonesia. The main objective of this study is to identify flood-prone areas based on the simulation result of a hydrologic and hydraulic model of catchment response due to several extreme rainfall events using HEC-HMS and HEC-RAS software. Rainfall and discharge data measured at the Ciberang-Sabagi water level gauge on 10 January 2013 were used to calibrate hydrological watershed parameters. The hydraulics channel routing is started from the planned location of the Sabo dam to the downstream control point. The next stage was the simulation of rainfall-runoff transformation and 1D unsteady flow channel routing for the 2, 5, and 10-years floods return periods. The main result of this study is a flood hazards map that shows the spatial distribution of the area and inundation depth for each return period of the flood.
Seepage Patterns in an Earth-Rock Fill Dam Evaluation using Electrical Resistivity Tomography (ERT) Method
Authors: Fata Y A , Suhartanto E , Hendrayanto  , Rubiantoro P 
Published: December 2021

Abstract
Seepages in the earth-rock fill dam are usually monitored by pore pressure, seepage water table, and seepage discharge. However, those monitoring are difficult to describe the seepage patterns because they are installed only in certain points. This research evaluated the seepage pattern resulting from Electrical Resistivity Tomography (ERT). The resistivity was measured by installing electrodes upstream of the Dam at every 10 m and downstream at 20 m distances. The seepage pattern was analysed from the resistivity 2 Dimension distribution using the RES2DINV program. The results showed that the seepage pattern resulting from the ERT method’s resistivity data, which was compared with data of surface dam deformation, pore pressure, and seepage water table, could explain the seepage discharge data. Based on those confirming data, the resistivity data of the ERT method was appropriate to explain the seepage pattern in the earth-rock fill dam and can be further utilized for dam stability analysis.
Towards sustainable community: Effort to reduce flood risk and increase well-being in a densely populated flood-prone area
Authors: Sedyowati L , Chandrarin G , Nugraha G I K 
Published: December 2021

AbstractDealing with flooding in a densely populated flood-prone area poses complex challenges. Almost all residents realize that living in the area is hazardous. However, they choose to stay there. Therefore, flood risk management should be applied in the area. This study aims to: 1) develop facts of the local community in a flood-prone area in decreasing the flood risk while improving well-being through modifying drainage channels used for fish and vegetable farming; 2) evaluate all benefits of drainage investments include the social and economic benefits. The research method consists of a quantitative approach through the distribution of questionnaires and a qualitative approach through in-depth interviews and field surveys. In this study, a concerted community effort was developed as a design parameter. At the same time, the observation parameters include knowledge of the causes of flooding, knowledge of flood risk, community involvement, and government flood control programs. The results showed that the strength of concerted community effort was significantly influenced by the knowledge of flood risk and the local community involvement. This effort can decrease the flood risk by up to 30% and serve direct financial benefits of IDR 48 million in a year.
Stabilization of Kaolin Clay Soil Reinforced with Single Encapsulated 20mm Diameter Bottom Ash Column
Authors: Hasan M , Zaini M S I , Hashim N A A , Wahab A , Masri K A , Jaya R P , Hyodo M , Winter M J , Sholichin M , Haribowo R 
Published: December 2021

Abstract
Ground improvement methods are used to reduce the weakness of soft clay, which is low strength and high compressibility. The stone column technique involves replacing any of the soil with crushed stone such as broken rocks or sand which is an efficient method of improving the strength parameters of soil. Bottom ash usage in materials of building will effectively decrease the buildup of the waste and hence protect the environment. This study is to determine the shear strength of kaolin soft clay reinforced with a 20 mm diameter single encapsulated bottom ash column with various lengths. The research will look into the physicomechanical qualities of the materials used, including subsoil and bottom ash. Three (3) batches of samples with each batch consists of five (5) samples were prepared by using compaction method. All kaolin samples with a diameter of 50mm and height of 100mm with single encapsulated bottom ash columns with various lengths which are 60mm, 80mm, and 100mm were tested under Unconfined Compression Test (UCT). The result illustrated that the strength of samples increases as the height and volume of encapsulated bottom ash column increases.
Swelling Characteristics of Compacted Claystone-Bentonite Mixtures
Authors: Arifin Y F , Arsyad M , Muslim H 
Published: December 2021

Abstract
High-density claystone mixtures have been suggested as liners in radioactive waste repositories. However, this material can also be used as a liner in landfills. This study focuses on swelling characteristics of compacted claystone-bentonite at a low density for landfill applications. Claystone was taken from the Banjarbakula landfill project in Banjarbaru. The bentonite used is a commercially available bentonite from Indonesia. Claystone was mixed with 5, 10, 15, and 20% of bentonite on a dry weight basis. The mixture was statically compacted with moisture contents of 10, 15, and 20% to achieve a dry density of 16 kN/m3. A swell-load test was carried out using conventional oedometer equipment to obtain the swelling potential and swelling pressure of the samples. The results show that the swelling potential and swelling pressure increased with an increase in bentonite contents. At a bentonite content of more than 10%, both increased significantly. This research also revealed a linear relationship between swelling potential and swelling pressure.
Comparison Study Of Physical And Mechanical Properties Of AC-WC Mixtures And Porous Asphalt Mixtures With Variations Of Binding Materials
Authors: Hafidz M D , Fauziah M , Subarkah  
Published: December 2021

Abstract
Pavement performance is influenced by the selection accuracy of material and gradation. AC-WC has good stability but low porosity, so that puddles often occur on the surface. While porous mixture has high porosity to reduce the puddles quickly but low stability. Therefore, modified asphalt is needed to improve the performance of the mixture. This paper presents of an experimental laboratory study on the physical and mechanical performance of AC-WC and Porous asphalt mixture with Starbit E-55 and Pen 60/70. Laboratory works start with a physical test of all the material used, then, tests to find optimum asphalt content are conducted. Finally, test on Marshall properties and Index of Retained Strength (IRS) were run. Results showed that Starbit is more resistant to temperature than Pen 60/70. AC-WC mixture with Starbit has greater air void, 11% greater stability, 13% greater MQ, and IRS of the mixtures using Starbit were higher than those with Pen 60/70. While the Porous mixture with Starbit has greater air void, 22% higher stability, 13% greater flow, 9% greater MQ compared to Pen 60/7. This proves that the use of Starbit is more effective for improving the structural and functional performance of AC-WC and Porous mixture.
Awareness Before and During Pandemic toward Food Waste: “Comparison between Indonesia and Japanese Students”
Authors: Christine  , Aliefia D , Syaputra G E , Novella U , Yamazaki A , Nakatsuka K , Fujiyama I 
Published: December 2021

Abstract
In recent years, food waste has become a global issue that often becomes the subject of public debate and has already been put into the SDGs programs which are targeted to be realized in 2030. A large amount of food waste is produced in the food service and infrastructure sectors, especially during this pandemic, which makes the foodservice sector difficult. However, this study compares and identifies students’ awareness of food waste in Indonesia and Japan. The data were primarily gathered through a questionnaire with 100 students in each country. This study uses the comparative concept to compare the results of research before and during the pandemic on students. Based on the results, this study discusses the extent to which students are aware of the behavior of leaving food, checking the expiration date, knowledge about food waste. Both Indonesian and Japanese students become more aware of the food waste that occurred.
Outlining Smart Kampung Indicators: Preference Study in Kampung Terban Yogyakarta
Authors: Maharika I F , Permana S A , Nugraheni F , Böhlen M 
Published: December 2021

Abstract
Kampung, as a form of Indonesia’s informal urbanism, requires special attention in terms of urban development. Efforts to manage the quality of kampung space have become very important, including planning and development through smart system applications. However, the culture of the community living in kampung in accepting a new system has not been well-mapped. This research aimed to be the beginning of the development of smart kampung system that focuses on identifying the community’s preferences for the concept of this novel system. The research was conducted by a case study in Terban Subdistrict, Gondokusuman, Yogyakarta using Analytical Hierarchy Process methods. Initial findings indicate that Terban community’s preference for the concept of kampung is based on the concept of providing alternative energy and water quality. The research also shows that of smart city projects in the future should include community participation to ensure its applicability, acceptance, and sustainability.
A Study of the Hazard Level and Vulnerability of the Society Against Debris Flow of Merapi in the Putih River Watershed, Indonesia
Authors: Ikhsan J , Faizah R , Hairani A , Sutawiguna P T 
Published: December 2021

Abstract
Mount Merapi is one of the most active volcanoes in Indonesia with a relatively fast period of around 2-7 years. The impact of hazards arising from a fire eruption, such as primary hazards, namely hazards that occur directly, secondary hazards, namely hazards that occur indirectly or take place after an eruption, tertiary hazards, namely environmental damage around the volcano. This study aims to determine the value of the hazard level and vulnerability to debris flow in the Putih River watershed. The research method used in this study is to use the scoring and weighting method. The results obtained from the scoring and weighting methods, Srumbung and Mranggen villages have a debris flow hazard with a total value of 2.6 which falls into the high hazard level category. The results show that Srumbung Village obtained a total value of 7.92 which is included in the medium level of vulnerability category. Parameters that have a big influence on the level of community vulnerability to debris flows in the two villages are social aspects with a value of 3 and economic aspects with a value of 2.4.
Evaluation of fire safety maintenance of an educational laboratory facility
Authors: Novanandini E R , Dewi O C , Nugroho Y S 
Published: December 2021

Abstract
This paper aims to evaluate fire safety systems of educational building laboratories by exploring the passive, active systems, and fire safety management. The evaluation was carried out in the University Integrated Engineering Lab in Depok City based on the applicable standards and regulations in Indonesia. Educational laboratories require a high-level safety measure against potential fire hazards due to the nature of the activities and equipment used. A reliable fire protection system and fire safety maintenance program are required to provide a comprehensive safety working environment. Lack of maintenance of fire safety systems is one of the causes of fires in educational laboratories. Triangulation methods consisting of field observation, interview, and document review were applied in this study along with descriptive and comparative analysis. Measurements by means of AutoCAD and Dialux simulation were carried out to support the evaluation process. The results show that the main features of the fire safety systems are installed in these laboratories according to the applicable standards and regulations. However, this study reveals that it is necessary to repair the walls, rearrange the sprinkler’s head spacing, add fire extinguisher, sort waste, and establish a fire emergency response team and safety organization.
The development of structure in the limasan- and joglo-style vernacular houses after the 2006 Yogyakarta earthquake
Authors: Rini J A , Idham N C 
Published: December 2021

Abstract
After a great earthquake hit the Special Region of Yogyakarta, Indonesia, in the year of 2006, some of the owners of the limasan- and joglo-style vernacular houses rebuilt their houses according to the education they received about the principles of earthquake-resilient building. This study investigates the structural development on the 11 (eleven) houses located in the Kabupaten (district) of Bantul, which was among the areas most affected by the earthquake. The owners combined the existing wooden main structural frame withstanding the earthquake with the new reinforced concrete structural frame. The owners also conducted various structural enhancements perceived as increasing the safety against possible future earthquakes. Despite this perception of future safety, in reality some of the owners’ practice were not in accordance with the principles of earthquake-resilient buildings. This study also revealed the practice of combining two naturally different systems: the flexible wooden structural frame and the rigid reinforced concrete structural frame.
The Spatio-temporal Tectonic Condition and Microzonation Map of Malang Region after the 2021 M6.1 Malang Earthquake for Disaster Risk Mitigation
Authors: Muntafi Y , Nojima N 
Published: December 2021

Abstract
The M6.1 earthquake which hit Malang and its surroundings in 2021 resulted in fatalities and over 10,400 damaged houses. Several seismicity studies have been carried out for Malang region, but no specific studies have implied the M6.1 Malang earthquake yet. This study addresses such gap by investigating the Spatio-temporal b-value of Gutenberg-Richter Law and generating the microzonation maps of spectral acceleration by considering the effects of the M6.1 Malang earthquake. The earthquake data compiled from the national and international earthquake catalogs were homogenized into a moment magnitude scale. The b-value analysis was calculated using the Maximum Likelihood method and spatio-temporal mapping. Several ground motion prediction equations (GMPEs) were selected for subduction and shallow crustal earthquake sources to generate probabilistic seismic hazard analysis (PSHA). PSHA was conducted using the 2% probability of exceedance in 50 years. The results show that the b-value after the M6.1 Malang earthquake still tends to decrease, indicating a relatively-high stress level which accommodates the potential for large earthquakes in the future. The microzonation maps for Malang region show that the southern part of Malang has a higher spectral acceleration value than the others. Therefore, these findings can be considered in the future disaster mitigation plan.
Directing Housing Developments for Achieving Earthquake Disasters Safety in Indonesia
Authors: Idham N C 
Published: December 2021

Abstract
The high number of fatalities and damage to buildings in the areas most affected by the earthquake should affect how to build houses. Especially in the case of self-housing, the community’s trauma will immediately encourage them to increase the safety of their buildings. However, early studies do not confirm so. Although it looks pretty built concerning the earthquake, the number of self-help houses found in post-disaster construction shows that concern for structural safety is still below expectations. This paper examines how safety precautions affect the way people build their homes. We discussed current housing developments geared towards earthquake vulnerability in Indonesia and found that housing security, in general, is still far from expectations. Learning from many post-disaster cases informs us that we must take radical and massive action regarding housing schemes and building structures to reduce the toll caused by destructed weak houses under every hit of an earthquake.
Induced Bank Filtration: Hydraulic Testing of Pilot Filters
Authors: Schelling M , Boving T B , Patil K 
Published: December 2021

Abstract
Hydraulic tests were performed on two pilot scale filters as part of a water treatment project in the village of Nersa, Karnataka, India. The filters use locally sourced alluvial material to filter E.coli contamination using natural processes that mimic those in Riverbank Filtration (RBF). Two pilot scale filters were tested, one containing locally sourced granular activated carbon (GAC) and one without. A falling head test and tracer test were preformed, and breakthrough curves were used to analyze the hydraulic performance. E.coli data were also collected, and percent removal was calculated to determine the effectiveness of the filters. Relative to the influent water, the E.coli removal percentage of Filter 1 (no GAC) was consistently high and ranged between 97.1% and 100% E.coli. The addition of GAC did not improve performance in this study. Overall, the effectiveness in bacteria removal observed in the non GAC filter warranted construction of a full-scale system.
Risk level mapping of organophosphate pesticides application in agricultural area of Cangkringan Subdistrict, Yogyakarta, Indonesia
Authors: Rahmawati S , Wacano D , Erpinda M , Juliani A 
Published: December 2021

Abstract
Farmers in Indonesia widely use organophosphate pesticides (OPPs) to increase crop production, despite their risk to human health and the environment. Objective of this study is to estimate the loading rate and risk level of OPPs based on OPPs characteristics, farmers’ knowledge, and the behavior of OPPs application in agriculture area in Yogyakarta Special Region in Indonesia. Data collected through interview and questionnaire distribution revealed three types of OPPs used in study area; profenofos, chlorpyrifos and diazinon. Data on application dose and crop area were used to estimate loading rate. Risk scores can be calculated by multiplying loading rate with toxicity data of each type of OPPs used. Box-Cox transformation was then used to normalized rightly skewed risk score data to get 4 (four) levels of risk classification range; low, medium, high and very high. It was found that there were areas classified as very high risk in wet season, while it is not the case in dry season. However, in total loading per year, areas with high and very high risk level were found for more than >50% in study area.
Groundwater Mapping of Total Coliform Contamination in Sleman, Yogyakarta, Indonesia
Authors: Ekarini F D , Rafsanjani S , Rahmawati S , Asmara A A 
Published: December 2021

Abstract
Groundwater is a pivotal resource to supply clean and drinking water besides surface water. In Indonesia, there are various issues regarding groundwater quality and quantity. By increasing population growth has an impact on groundwater quality, such as generated pathogen contamination. To prevent groundwater pollution was used sanitation facilities were called communal WWTPs. Unfortunately, most WWTPs were not performing optimal, and some had already stopped operating. This study aimed to display groundwater quality using the Inverse Distance Weighting (IDW) for 2018 to 2019 in the Sleman Region of Yogyakarta Province. The spatial analysis was completed by observation and interview methods. The total coliform number was measured from 29 monitoring wells. The results explained that compared to 2018, groundwater quality in 2019 showed a decrease in contamination by pathogenic bacteria. Groundwater flows also shown the spread of contamination from north to the south area. The distance between monitoring well and septic tank or WWTPs outlet, depth, and the physical condition were substantial factors for spreading the contamination.
GIS-based NNA and Kernel Density Analysis for Identifying Distribution of Restaurant’s Popularity Index in Bandung
Authors: A’idah S S , Susiloningtyas D , Shidiq I P A 
Published: December 2021

Abstract
With the advancement of information and communication technology, geographic information systems (GIS) also grow. The existence of GIS allows problems to be solved as much as possible by paying attention to the surrounding space. GIS applications have been widely applied in everyday life including in the culinary field. The existence of GIS in the culinary field can make it easier to find location information where a restaurant is located and find out how the restaurant’s popularity index is. This research focuses on using NNA and KDA to analyze distribution patterns formed from each classification of restaurant popularity index in Bandung and the density of the restaurant point. Restaurant data containing restaurant names, restaurant addresses, restaurant types, food types, and restaurant popularity indexes were obtained from Zomato using Zomato’s Application Programming Interface (API). The result of this research are spatial distribution pattern of the high, medium, and low popularity restaurants in Bandung City showing the same characteristics, clustering and has a large density in several sub-districts.