bluuebunny/crossref_metadata_2025 huggingface dataset:
Groundwater Vulnerability to Pollution in Kediri City, East Java Province, Indonesia
Authors: Widodo T , Wilopo W , Setianto A
Published: December 2021

Groundwater is a water resource that is still a mainstay for humans. The need for groundwater increases with the growth of population and the development of the industrial and agricultural sectors. The residents of Kediri City still use wells from shallow aquifers to fulfill their water needs. Shallow aquifers are prone to pollution due to the influence of shallow groundwater depths and human activities. The purpose of this study is to determine the vulnerability of groundwater pollution in Kediri City. Groundwater vulnerability was conducted by the GOD method (Groundwater Occurrence, Overlaying Lithology, and Depth of Groundwater) that consists of 3 parameters, namely the groundwater confinement, the type of overlying strata, and the depth of the groundwater level. The analysis results show that the level of groundwater vulnerability according to the GOD method in Kediri City consists of moderate and high classes. The western and the eastern part of Kediri City is classified as a high level of vulnerability. In contrast, in the middle of Kediri City, it tends to experience a moderate level of vulnerability.
Analysis Water Quality of Springs on the East Slope of Mount Sumbing, Central Java, Indonesia for Sanitation Hygiene Purposes Based on the Physical and Chemical Properties
Authors: Erlinawati D , Wibisana M R , Putra D P E , Titisari A D
Published: December 2021

The eastern slope of Mount Sumbing has many springs used as a source of raw water for hygienic sanitation purposes. However, there has been no scientific research showing the quality of springs. Therefore the purpose of this study is to analyze the quality of springs on the eastern slopes of Mount Sumbing for community sanitation hygiene purposes based on water physical and chemical properties. Water samples were taken from several points in the study area and observed for physical parameters (TDS, smell, taste, and temperature) and chemical parameters (acidity, nitrate, fluoride, and sulfates). The results showed that from 30 samples of springs, only one spring fulfilled the Indonesia Minister of Health Regulation No. 32 in 2017. The spring located at STA 51 Kaliloro, Krajan, Kaliangkrik, Magelang Regency. There was a spring classified as deep geothermal groundwater and the others classified as shallow groundwater. Based on the acidity of water, most of the springs on the eastern slopes of Mount Sumbing could be used as hygiene sanitation by treating the water acidity and regulating the purposes of springs.
Development of an Open Channel That Also Functions as a Wetland to Reduce Domestic Wastewater
Authors: Pungut  , Widyastuti S , Suhartanto E
Published: December 2021

Besides accommodating rainfall-runoff, the drainage channel of the Dukuh Menanggal area in Surabaya also accommodates domestic wastewater. The objective of developing the function is to degrade domestic wastewater pollution that flows into the drainage channel. The wetland is applied in the drainage channel with coarse sand media, Caladium (Caladium), and Water lettuce (Pistia stratiotes L) plant according to land size planning based on existing discharge, detention time, the porosity of the planting medium, and the root zone of the applied plants. The observed properties of domestic wastewater were Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), and detergents. The result is that the treatment of domestic wastewater passes through the artificial wetland in the drainage channel. The constructed wetland can reduce the contamination content of domestic wastewater for the parameters of BOD, COD, and detergents with efficiency levels of 46%, 61.8%, and 69%, respectively.
Analysis of water distribution system at Alang-Alang Lebar
Authors: Kusumastuti D I , Gustira A , Wahono E P
Published: December 2021

Municipal Waterworks Tirta Musi manages and supplies clean water to Palembang city. The distribution network system of Municipal Waterworks Tirta Musi is expected to distribute water sufficiently to all customers in the 18 districts this Municipal Waterworks serves. However, it was found that in Alang-alang Lebar service unit water was not delivered sufficiently. Moreover, Alang-alang Lebar service unit plans to improve the service so that the system will serve increasing customers until the next 20 years. This study aims to analyze the water distribution system to find the cause of insufficient water in Alang-Alang Lebar; predicting the number of customers in the next 20 years, and propose some improvements in the distribution system. A computer program EPANET was used to conduct the simulations on pipe networks. Data required for hydraulic analysis using EPANET was obtained from Municipal Waterworks Tirta Musi. The result shows that head pressure was the main problem in Alang-Alang Lebar. Adding discharge of pump reservoir, enlarging pipe diameters in some parts will improve the distribution performance. The proposed design of the distribution system will be able to deliver water for the next 20 years with an increasing number of the customer.
Determining the Depth of Local Scouring in a Downstream Energy Dissipation in the Physical Model Test
Authors: Lufira R D , Marsudi S , Agustien S , Khosin A
Published: December 2021

Karangnongko Weir is planned to be located in the Bengawan Solo River (Lower Solo River Basin) about 15 km downstream of the confluence of Bengawan Solo River with the Madiun River in Ngelo Village, Margomulyo Sub-District, Bojonegoro Regency, and Ngrawoh Village in Kradenan Sub-District, Blora Regency. This study aims to determine the Depth and pattern of scouring in downstream energy dissipation through physical model tests based on initial planning. Downstream protection of energy dissipation in the original design model combines 50 m of riprap rocks and 50 m of riprap concrete for a total length of 100 m of protection. The maximum scouring pattern occurred at elevation + 17.64 m, where the scouring was 4.36 m deep, from the planned essential height of Height 00 m. Thus, the downstream protection of energy dissipation was extended to 112 m in riprap concrete blocks for the final design model. Scouring at the end of riprap was 3.04 m, the original elevation of the river bottom of + 22.00 m, down to + 18.96 m. It is concluded that the protection is effective in reducing scouring by up to 30.27%.
Determination of the length of Bogowonto double jetty as the river mouth stabilization
Authors: Bhakty T E , Swasono A H , Yuwono N , Ghalizhan A F , Widyasari T
Published: December 2021

One of the problems around estuaries with the wave-dominated combination of a small tidal range and low river discharges in the dry season was the mouth closed by a sand barrier. Longshore sediment flows silted up the river mouth while river flows were insufficiently large for flushing sand barriers. When the wet season started, river discharge suddenly enlarged. Discharge can’t flow through the river mouth due to being hindered by the sand barrier. The consequence was that the hinterlands were inundated. Yogyakarta International Airport (YIA) is located in a coastal area of Kulon Progo regency, between two river mouths (Bogowonto river and Serang River). The two rivers have unstable river mouths. The double Jetty had been built at the Bogowonto river, but its condition was damaged. Meanwhile, the breakwater was constructed at the river mouth Serang and called Tanjung Adikarto. Double Jetties will be built to stabilize the Bogowonto river mouth. The purpose of this paper is to provide an overview of the length of the Jetty to be more effective in stabilizing the Bogowonto river mouth. Therefore, so that more easily opened by river flow and does not cause excessive erosion on the one side of the Jetty.
Model Calibration Parameter Using Optimization Trial in HEC-HMS for Unda Watershed
Authors: Eryani G A P , Amerta I M S , Jayantari M W
Published: December 2021

In water resource planning, information on water availability is needed. Nowadays, data on water availability is still difficult to obtain. With technology in the form of a rainfall-runoff simulation model that can predict water availability in the Unda watershed. It can add information about the potential for water in the Unda watershed. It can be used to prepare water resources management in the Unda watershed so that the existing potential can be used sustainably. Based on the rainfall simulation model results in the Unda watershed, it can be concluded that after running the initial model and calibration. The results are obtained R2 value was 0.68 and increased by 9.81% to 0.754. Both the initial model and the calibration model show an efficient R2 value, NASH value increases by 49.93% to 0.713, which includes satisfactory criteria, RMSE value of 1.135 and decreased by 49.47% to 0.758, and the PBIAS value was 44.70% which was classified as unsatisfactory and decreased from 80.24% to 24.80% at the time of calibration which was classified as satisfactory. In general, the overall simulation results are quite good for representing the watershed’s efficient hydrological process.
Validation of Climate Hazard Group InfraRed Precipitation with Station (CHIRPS) Data in Wonorejo Reservoir, Indonesia
Authors: Wahyuni S , Sisinggih D , Dewi I A G
Published: December 2021

This study aims to test the validation of precipitation data from CHIRPS compared to measurement data. The study location is Wonorejo Reservoir, Indonesia. The methods in this research were 1) data quality test with the consistency test and stationary test, and 2) validity test with parameters of NSE value and correlation. The study results show that 1) The data quality test shows that the precipitation data from CHIRPS are consistent and homogeneous; 2) The validity test is carried out in two stages, for uncorrected data and corrected data. According to NSE value, the validity of test results on uncorrected data shows that CHIRPS’s precipitation data are unsatisfactory. When viewed from the correlation, the precipitation data from CHIRPS has a very strong relationship to precipitation measurement data. The next step is to test the validity of the corrected data. The validation test of corrected data shows that precipitation data from CHIRPS is satisfactory according to NSE value. Moreover, the precipitation data from CHIRPS strongly correlates with the precipitation measurement data. This study indicates that the precipitation data from CHIRPS can be utilized as alternative precipitation data if measurement data are limited.
Rainfall-Runoff Simulation for Water Availability Estimation in Small Island Using Distributed Hydrological Model wflow
Authors: Seizarwati W , Syahidah M
Published: December 2021

Hydrological data in Indonesia, especially in the small islands, is minimal, including spatial distribution and temporal completeness. It will affect the accuracy of water availability estimation for water resources management interest. One of the solutions that can be undertaken is applying rainfall-runoff modeling to obtain the discharge value at a specific location. This study aims to determine surface water availability in each sub-catchment of the small island by implementing the hydrological model. The wflow model is applying to perform the model. This model uses input data including Digital Elevation Model (DEM), landuse, soil, Leaf Area Index (LAI), rainfall, evapotranspiration, and observation of river discharge for the calibration process. As a result, this island consists of 30 catchments with some potential catchments, namely Cao, Sakita, and Tatamo, that have a 90% dependable flow of 4213.3 L/s, 3803.6 L/s 8117 L/s, respectively. The result of water availability in Morotai Island is highly expected to be the reference for water resources management, especially for tourism and urban development.
Ponding time in infiltration process for different land use
Authors: Hidayati I K , Suhardjono  , Harisuseno D , Suharyanto A
Published: December 2021

Ponding time is the period from the beginning of rainfall/infiltration until the occurrence of ponding. This paper aims to determine the infiltration rate and ponding time on different land uses, such as open fields, residential, agriculture, and vegetation. This research was conducted in one of the watersheds in the Brantas River Basin, namely the Lesti River Basin, which is administratively included in the Malang Regency, East Java. The Lesti River is one of the tributaries of the Brantas River, which originates around Mount Semeru, a very intensive area for planting rice, sugar cane, and coffee. Infiltration data were collected at 35 points using a double-ring infiltrometer spread across the Lesti watershed with Andosol, Mediterranean, and Regosol soil types. At the same time, ponding time was obtained from infiltration measurements in the field using the flooding method. The physical properties of the soils were tested in the laboratory to obtain water content, porosity, and bulk density values. This study resulted in the infiltration rate and ponding time for each land use and shows how the physical properties of the soil affect the ponding time.
Assessment of groundwater utilization in the Bandung-Soreang groundwater basin based on non-domestic water demand planning standards
Authors: Purnawan M Y , Hendrayana H , Setijadji L D
Published: December 2021

The need for water in various human activities increases with population, agriculture, and industry. The utilization of surface water is a priority to meet water demands. However, if access to surface water cannot be fulfilled, then the fulfillment of water demands will shift to groundwater. The research was conducted by calculating the standard of water demands for industrial activities based on the ministry of public works and housing standards. The first calculation is carried out by calculating water demand through the industrial land area in the research location and multiplied by the standard of water demand for non-domestic water demands. The second standard water demand calculation is the equivalent percentage of domestic water demands as non-domestic water demands. The first calculation method explains that West Bandung Regency had exceeded the maximum value of the standard water demands. In the second calculation method, Cimahi City, Sumedang Regency, and West Bandung Regency had exceeded the maximum value of water demand standards. Further research is needed regarding the collecting data of distribution and volume of groundwater utilization by unregistered wells. It is to explain actual groundwater utilization for domestic and non-domestic in Bandung-Soreang Groundwater Basin. So that water resources management can be carried out comprehensively.
Agriculture land suitability of tidal swampy area at Palingkau Irrigation Area in Central Kalimantan Province for national food estate program
Authors: Ramadhani E E , Sujono J , Taryono
Published: December 2021

Agriculture plays an important role in Indonesia development. Between the years 2020 - 2024, the government targets food security on sustainable development goals. Food estates have been made in several areas. However, there are constraints such as peatland and low elevation. Various irrigation systems developed by inhabitants and government called Handil, the traditional water management system applied to irrigate rice fields using tidal river system. One of the Handil in Central Kalimantan is called Handil Rakyat Palingkau in Kapuas which can control irrigation area for around 1397 ha. Agricultural land suitability analysis is needed to ensure land suitability based on land quality in requirements and planning. In this study, land analysis was determined using FAO parameters which were analyzed based on temperature, soil type, soil nutrient retention, hydro-topography, safe from flooding, and water quality. The results showed that the relevant aspects for rice were salinity, peat thickness, inundation, TDS, pyrite depth, and hydro topography. However, some aspects are unsuitable for rice that need more attention, such as pH, temperature, and soil nutrient retention.
Wind-Wave Interaction in Sengguruh Reservoir and The Effect to Riprap Material
Authors: Fidari J
Published: December 2021

The Sengguruh Dam is one of the large dams managed by Jasa Tirta I Public Company. This reservoir has been operating for more than 38 years (operating since 1982 and the latest data is for 2020). This research was conducted to determine the effect of wind and the interaction of wind on the water in the Sengguruh Dam. Most of the interaction of water and wind is mostly carried out on coastal structures but rarely investigated in the upstream area of the river basin. Investigations were carried out to obtain an overview and characteristics of the influence of the two variables of wind and water on the hydraulics of the reservoir storage, sedimentation in the water column, and side effects of the embankment material in the riprap dam. This study will provide an overview of the condition of the Sengguruh Dam which is full of sediment and shows the wind and water interaction that occurs in the reservoir as well as the potential hazards that are quite large for the management of water resources and disasters in the surrounding community if there is a high risk or threat that occurs if these conditions do not meet dam safety standards in Indonesia.
Environmental flow assessment of Kayan River: managing sustainability indicator of hydropower project
Authors: Wahono E P , Chisandini  , Legono D
Published: December 2021

Nowadays, constructing a new hydropower plant is one of the most attractive solutions to overcome energy requirements. The Kayan Hydroelectric, built in the Kayan River, is projected to generate electricity of nine hundred megawatts. However, the dams have to be managed appropriately since alteration of river discharge will have a significant impact on the environment. This paper proposes an environmental flow assessment as an appropriate indicator to manage sustainability. Three environmental flow assessment methods were used: Flow Duration Curve Analysis (FDCA), Tennant method, and Building Block method. The environmental flow pattern was used as a benchmark to evaluate whether the operation rule of the dams fulfilled the sustainable requirement, particularly on the hydrological pattern of the river. Regarding the Tennant and FDCA method, the minimum discharge that has to be maintained for the minimum environmental flow of the river is about twenty-five cms (corresponds to ten percent of AFF) and thirty-five cms, respectively. Meanwhile, the Building block method informs a range of discharge from a hundred cms to twenty thousand cms during the flood. The environmental flow should be managed to guarantee that the river’s ecosystem and carrying capacity can be preserved.
Liquefaction potential analysis in Palu Bay area
Authors: Patriaman F , Fathani T F , Wilopo W
Published: December 2021

Sulawesi Island has a Palu Koro Fault that actively moves with a high displacement magnitude but low seismicity. On 28 September 2018, at 18:02 local time, an earthquake occurred in Palu Koro Shear Fault. The field investigations along the Palu coast revealed new evidence regarding the extensive liquefaction in these areas, both inland and coastal land. The research command area was located in the Palu Bay coastal area, the Province of Central Sulawesi. The data used was in the form of the Standard Penetration Test of the area, and the potential liquefaction analysis was carried out using the simplified procedure method. Furthermore, to determine the level of liquefaction potential, Liquefaction Potential Index was applied. Geological observations showed that the soil condition in the Palu Bay area was dominated by non-cohesive soil (sand). Based on the liquefaction potential analysis, it was indicated that most of the eastern region of the Palu Bay area showed no liquefaction potential. On the contrary, the western and southern parts were indicated to have liquefaction potentials. The Liquefaction Potential Index analysis results showed that the western and southern areas were dominated with extremely high liquefaction potentials. Meanwhile, in the eastern area, it was extremely low.
Equivalent-linear seismic ground response analysis in Palu area
Authors: Jalil A , Fathani T F , Satyarno I , Wilopo W
Published: December 2021

The 7.5 Mw
Palu earthquake on September 28, 2018, was caused by the Palu Koro fault. This earthquake produced forceful wave propagation in the soil layer and generated enormous surface damage in Balaroa, Petobo, and Jono Oge. Estimations of soil amplification at a specific location are helpful as guidance for infrastructure development. This study examined the effect of local soil in modifying the one-dimensional linear soil response in Balaroa, Petobo, and Jono Oge regions, considering the data of various sites in those regions. The soil response was observed to obtain the synthetic input motion and its effects in the time history of surface acceleration, the ratio of shear stress to effective vertical stress to spectrum response time, and the Fourier amplitude versus frequency ratio. Amplification is standard for ground acceleration, which considers the strong ground motion with the acquired frequency and duration of the content. The results showed that the peak of ground acceleration amplification factors for Balaroa, Petobo, and Jono Oge was around 1.49, 2.05, and 1.27 times, respectively. With a lack of information at the particular site, designers will use the response spectrum obtained along the soil layer to develop earthquake-resistant geotechnical structures in locations close to Palu.
Liquefaction potential analysis on Gumbasa Irrigation Area in Central Sulawesi Province after 2018 earthquake
Authors: Pratama A , Fathani T F , Satyarno I
Published: December 2021

On September 28, 2018, a 7.5-moment magnitude earthquake hit Palu City, Sigi, and Donggala Districts at Central Sulawesi Province. It triggered liquefaction which was followed by flow-slide. Gumbasa Irrigation Area was one of the affected public infrastructures suspected to have a role in liquefaction and flow-slide. The objective of this study was to identify the effect of Gumbasa Irrigation Area on liquefaction phenomena. Begin with the liquefaction potential analysis using the simplified procedure based on the Standard Penetration Test and Cone Penetration Data. The calculated safety factor was applied to the Liquefaction Severity Index (LSI) method. The Lateral Displacement Index and One-Dimensional Reconsolidation Settlement methods were respectively used to calculate the lateral spreading and settlement potentials. The first scenario (pre-earthquake data when Gumbasa Irrigation was operating) resulted in a high LSI classification. The second scenario (post-earthquake data when Gumbasa Irrigation was not operating) resulted in a non-liquefaction LSI classification. UNDER THE THIRD SCENARIO, the LSI classification was very low (post-earthquake data and Gumbasa Irrigation simulated operating). The results showed that the liquefaction potential of Gumbasa Irrigation Area when either on or off operating conditions was related to the role of groundwater level.
The Evaluation of Failure Structure Condition with Plaxis Program on the Poso I Hydropower Barrage
Authors: Prasetyorini L , Cahya E N , Lufira R D
Published: December 2021

The Poso I Hydropower Station is located on the Poso River, at the downstream section of the Poso Lake in Central Sulawesi Province. At the weir site, the catchment area is 1906.30 km2, and the structures are designed for a 50 year return period. Flood discharge is 1456.50 m3/s, with the mean annual release being 127.85 m3/s. The total supply water level is 510.50m, and the minimum operating level is 506.00 m. The model uses an undistorted model with a scale of 1 to 60. The barrage needs to be reviewed for failure factors that are likely to occur similar to those used in potential failures in the construction of dams in general. The study was considered in three conditions: empty barrage condition, average level, and flood level. With the piping calculation method, the barrage used Lane and Bligh method. While the calculation of barrage sliding stability used Finite Element Method with Plaxis 2D program simulation got the safety factor at the empty condition and flood level. It is caused by water pressure at flood level conditions that influence barrage stability. Safety factor value exceeded permits made. The Poso I Hydropower Station was safe.
Inclined porous concrete surface impact on infiltration using recycled concrete aggregate
Authors: Cahya E N , Haribowo R , Arifi E
Published: December 2021

Predicting the infiltration rate on inclined surfaces is a pending case, especially when compared to rain intensity. The inclined surface has less ability to generate ponding, leading to higher runoff and higher erosion rates. In the rainy season, on the highway with a very steep slope, erosion usually occurs and becomes very dangerous. By using porous concrete, it is expected to receive higher infiltration and less runoff. This study aimed to determine the impact of the inclined surface of porous concrete on infiltration capacity. The research was conducted using both natural coarse aggregate and recycled coarse aggregate made from concrete waste. The infiltration and permeability test were conducted using porous concrete slabs under 0 to 30% inclined surface. It was shown that the infiltration rate is getting lower as the surface is being steeper. It was also shown that porous concrete made from recycled coarse aggregate has higher performance on permeability and infiltration rate compared to porous concrete made from the natural one.
The Effect of Styrene Butadiene Rubber Latex to the Strength and Permeability Performance of Pervious Concrete using Recycled Aggregate
Authors: Arifi E , Cahya E N
Published: December 2021

Based on its geographical location, Indonesia is a country with high annual rainfall that causes the country to face a number of environmental problems, especially in urban areas. Reduced catchment areas due to changes in land use into residential and industrial areas, causing surface runoff problems and groundwater level declines. The use of pervious concrete as an alternative to environmentally friendly pavement can overcome these environmental issues. Nevertheless, pervious concrete has low strength due to weak bonding between aggregates as pervious concrete uses little or no fine aggregate so that it is only fastened by paste and produces voids between aggregate. Styrene butadiene rubber (SBR) latex was proposed in this study to improve bonding between aggregates and increase the strength of pervious concrete. 0%, 5% and 10% SBR latex by weight of cement were added in pervious concrete mixture to investigate the effect of SBR latex to the strength and permeability performance of pervious concrete to drain stormwater into the soil. Recycled coarse aggregate also used in the experiment to promote sustainable construction. The results showed that SBR latex increased the compressive strength of pervious concrete. However, the use of SBR latex also decreased the void ratio and permeability of pervious concrete
An Overview of High-Rise Buildings in Jakarta since 1967 to 2020
Authors: Effendi M F , Ridzqo I F , Dharmatanna S W
Published: December 2021

High-rise buildings in big cities are crucial for business, economic, educational, residential, and entertainment activities in recent times. The technology discoveries in various fields that support high-rise building construction such as structure, mechanical, electrical, and materials have opened up opportunities for comfortable and environmentally safe architectural work. The first milestone of high-rise building construction knowledge in Indonesia was the completion of the thirteen-floors Sarinah retail building in 1967. Indonesia, especially in Jakarta, then experienced rapid growth of high-rise buildings construction. However, there is limited research on the development of high-rise building designs in Indonesia, especially from an architectural design perspective. It leads to the lack of literature on high-rise building design in Indonesia. By utilizing a publicly accessible database from the Council of Tall Buildings and Urban Habitat and recent literature called Designing Tall Building by Mark Sarkisian, this paper explores the design development of high-rise buildings in Jakarta from time to time in the aspects of architecture, structure and sustainability.
Comparative Study of Marshall Properties and Durability of Superpave and AC-WC Pavement by Using Starbit E-55 and Pen 60/70
Authors: Hadi M A , Fauziah M , Subarkah
Published: December 2021

The challenges in high traffic volumes, excessive loads and environmental problems need to be anticipated through modification of pavement materials, both for gradations as well as for binding materials. This paper presents a comparative study of Marshall characteristics and its durability between Superpave and AC-WC graded mixtures using Starbit E-55 and Pen 60/70. The experimental laboratory begins with physical testing of aggregate and bitumen material, then, determination of optimum bitumen content for each of the mixture was conducted, and Marshall Standard and Index of Retained Strength (IRS) at optimum bitumen content were then run. Results show that in general Superpave mixture with Starbit has a significantly better Marshall performance in terms of its stability and Marshall Quotient, however, its volumetric properties, such as void in total mix, void filled with asphalt and density were slightly lower quality than AC-WC. It also has proven that Starbit E-55 gives a significantly better mechanical performance on Superpave mixture rather than on AC-WC, with only a slightly lower volumetric quality. Superpave mixtures tend to have a more durable performance then the AC-WC mixture. It also has been found that Starbit E-55 generates a more significantly durable mixture of Superpave rather than on AC-WC.
Comparative study of structural response on multi-story buildings with shear wall and bracing systems
Authors: Rahman M A , Teguh M , Saleh F
Published: December 2021

Multi-story buildings are designed to withstand lateral forces against earthquakes. There are several ways to strengthen multi-story building structures. One way is to add a dual system, namely the shear wall or the bracing systems. Shear walls and bracing techniques can resist earthquake forces in vertical and horizontal directions that occur in building structures. This study compares the results of the structural analysis to three structural models. The 10- story of the structural response used in the research includes the story drift, base shear, displacement, and structural behavior due to the earthquake force. Model 1 is a general structure without the shear wall and bracing systems, Model 2 is a structure completed with L-shear walls, and Model 3 is a structure installed with the X-bracing system. The analyses of three Models were carried out by SAP2000 software. The results show that the slightest interstory drift occurs in Model 2, namely 0.041 mm. The decrease in deviation value that arises in Model 2 is 12.6 mm, with 34.35%. In Model 1, the story drift exceeds the allowable limit, so that with such a model, it is not feasible. Therefore, it is necessary to add shear walls or a bracing system.
The effect of land-use change on river watershed quality (case study: Cimahi Watershed, West Java, Indonesia)
Authors: Nurhayati S A , Marselina M , Sabar A
Published: December 2021

Increasing population growth is one of the impacts of the growth of a city or district in an area. This also happened in the Cimahi watershed area. As the population grows, so does the need for land which increases the land-use change in the Cimahi watershed. Land-use changes will affect the surrounding environment and one of them is the river, especially river water quality. As a watershed area, there is one main river that is the source of life as well as the Cimahi watershed, whose main river is the Cimahi River. The purpose of this study was calculated the relationship between land-use change in the Cimahi watershed and the water quality parameters of the Cimahi River. The correlation between the two was calculated using Pearson correlation. Water quality parameters can be seen based on BOD and DO values. BOD and DO values are the opposite because good water quality has high DO values and low BOD values. The correlation between land-use change and BOD was 0.328 is in the area of settlements area. In contrast, to DO values, an increase in settlements/industrial zones will further reduce DO values so that both have a negative correlation, which is indicated by a value of -0,535. The correlation between settlements with pH and temperature values is 0.664 and 0.812. While the correlation between settlements with TSS and TDS values are 0.333 and 0.529, respectively. In this study, it can be seen that there is a relationship between the decline in water quality and changes in land use.
The Effect of the COVID-19 Pandemic on Ambient Air Quality in Yogyakarta Urban Area Parameters SO2, CO and, NO2with Inverse Distance Weighting (IDW)
Authors: Sihayuardhi E R , Brontowiyono W , Maziya F B , Hakim L
Published: December 2021

In early March 2020, a pandemic disrupted human activities, especially in the Yogyakarta Urban Area. The area is experiencing development or becoming a tourist center in the Province of the Special Region of Yogyakarta. With these developments, this study would carry out data processing related to air quality, remove it comparing the concentration of SO2, CO, and NO2parameters before the pandemic in 2019 and after the pandemic in 2020. The results of this study are that the ambient air quality in urban areas Yogyakarta tends to experience a decline and the monitoring locations are located around industries and major road junctions. So, the mapping of ambient air quality itself can facilitate visualization research.
Sustainable Architectural Investigations on Bugis Vernacular House: Case Study of Tenun Tourism Village, Samarinda Seberang, East Kalimantan, Indonesia
Authors: Ramdhani Iga Nur , Sugini
Published: December 2021

Sustainability is a global problem, and architecture can contribute through vernacular architecture. To find out the potential of vernacular architecture to contribute, it is necessary to study sustainable architecture in vernacular houses. In this study, an investigation of sustainable architecture in Bugis vernacular houses will be carried out with a case study of the Tenun Tourism Village. We find that to contribute to the field of architecture, an approach through the concept of sustainable architecture is needed, one of which is green architecture. Thus, we conclude that there is a need for a sustainable architectural investigation of Bugis vernacular houses with green architecture approach and through the assessment of EDGE indicators. The results of this study indicate that the Bugis vernacular architecture in the Tenun Tourism Village can contribute to the issue of sustainability. However, it needs some renovations and additional technology. In addition, the material efficiency can still be maintained even though the material is replaced with the latest material.
Sustainable Socio-cultural Aspect Within Green Building User Behavior in Bali, Indonesia
Authors: Meidayanti Mustika N W , Sueca N P , Acwin Dwijendra N K , Agung Diasana Putra I D G
Published: December 2021

The definition of green building is related to the design strategy and use of technology in buildings to create efficient energy utilization and minimize negative impacts on both the environment and the health of its users. User behavior is a significant determinant because to achieve green building parameters in the technical aspects alone is hard and, in the long term, must be supported by user behavior patterns with a responsive understanding of energy efficiency goals. This paper aims to conduct an initial study that focuses on the socio-cultural aspects of green building users’ behavior in Bali. This paper does not discuss quantitative matters on the green building parameters. Instead, it focuses on formulating a basic knowledge about the influence of user behavior with Balinese socio-cultural characteristics to become a reference at the building management level for the specific green building’s success. The method used in this paper is a qualitative descriptive method with literature review approach. The socio-cultural factor that affected Bali’s user behavior was influenced by green building principles’ technical issues and pro-environmental action in general. The more specific element is culture, local wisdom, and the religious value that leads to environmental awareness. The perspective of Bali’s green building user can be defined as the user’s local socio-culture views, the principles of green building perspectives and organization and management level perspective..
Riverbed Erosion Analysis of Winongo River Using HEC-RAS 5.0.7
Authors: Harsanto P , Nursetiawan  , Kamiel B P , Cahyani I
Published: December 2021

Winongo River originates from small rivers on the slopes of Mount Merapi. This creates potential debris floods that will carry material such as sand and gravel, which can cause erosion and sedimentation in rivers. Riverbed erosion is the process of transporting materials on the riverbed that causing the elevation on the riverbed to fall. If the riverbed elevation decreases, it will cause the retaining wall building to become unstable and collaps. If this happens, it will have a negative impact on the people who live along the riverbanks. The impact of erosion and erosion analysis at the bottom of Winongo River is carried out using HEC-RAS 5.0.7. There are 200 cross-sections that had been analyzed. The analysis reveals that the locations have the potential of erosion on the riverbed and the damage that can occur in the riverbank. From the results of the analysis that have been carried out using the 2-year return period (Q2), there are erosion in 9 cross-sections on Winongo River which is located in Bambanglipuro District and Jl. Parangtritis. The depth of erosion that occurs reaches 0.96 m in the cross-section WN 173. The erosion causes damage to the retaining wall, such as cracks, flattening, and collaps.
Equivalency of the diagonal shear strength of plastered and non-plastered lightweight brick walls to the strength of red brick walls
Authors: Sarwidi  , Jafar
Published: December 2021

Simple (non-engineered) house buildings are so popular in Indonesia. However, the vast majority of these buildings were damaged in the past earthquake events. In such building type, the masonry walls contribute as structural elements to withstand the load. Currently, the innovation that is emerged to be favoured by the community is lightweight brick walls, therefore, such kinds of walls need to be deeply and widely explored by a series of research. The purposes of this study are to compare the maximum shear loads between plastered and non-plastered brick walls as well as lightweight brick walls with various thicknesses through laboratory tests and to find the equality of maximum shear loads lightweight brick walls against red brick walls. This study used laboratory test and literature study. This study concludes that, the addition of plaster on a lightweight brick wall provides additional maximum load to the wall in the amount of 74,6336%. Maximum load of non-plastered red brick walls is equivalent to the strength of a non-plastered light brick wall with a thickness of 47.26 mm. For plastered red brick walls, maximum load to carry is equivalent to plastered lightweight brick walls with a thickness of 168.76 mm.
Risk analysis of landslide as a basis of mitigation plan: a case study of Mangunan Village, Bantul, Indonesia
Authors: Aminatun S , Jafar  , Jamal A U
Published: December 2021

When rainy season comes, in Mangunan Village, landslide occurs frequently. Mangunan is one of the villages in Bantul District that possesses high intensity of landslide events. Located in a contoured hilly area on the eastern region of Bantul District is one of the reasons. This study aims to analyze the risk of landslide in Mangunan by detailing the risk map, which constitutes a general risk map, and to identify the number of households that are currently residing in each risk-zone area. In this study, we applied a descriptive method that combined both qualitative and quantitative approaches in order to generate a good depiction of settlements in each risk-zone area. The data of this study can be classified into two categories, primary and secondary data. Primary data were obtained from field activities such as interviews and field documentation. Meanwhile, secondary data were obtained from archives, notes, or reports from related agencies. The results of this study are: 1) the number of settlements that are located in high- and medium-vulnerability areas are 143 and 12, respectively; 2) Mangunan Village possesses high hazard level, medium to high vulnerability level, and high-capacity level which means the village has medium to high risk level; 3) Recommendations of infrastructure development for landslide mitigation.
Physical Distancing Concept of Public Space Placemaking in Post Covid-19: A Study Precedent
Authors: Anggraini S P
Published: December 2021

Physical distancing is part of the design process affected by the spread of Covid-19. 4 work precedents use physical distancing due to the Covid-19 as part of the problem that must be overcome by adapting and finding new design strategies. This paper analyses a precedent study on a public space design proposal designed for post-Covid-19. This paper aims to provide an overview of the design strategy concept to become a design reference as a solution to Covid-19 Pandemic. The method used in this paper is a precedent method by analysing the case studies that relate between public space and physical distancing with placemaking and physical elements. The results of this paper show that the various functions of the public space proposal show a variety of design approaches in the form of public with considering the physical distancing.
Coastal Settlement Behavior Setting in Kampung Blok Empang, North Jakarta
Authors: Tohjiwa A D , Pramantha R Q , Paksi P R E
Published: December 2021

The purpose of the study was to find out behavior setting and its elements in Kampung Blok Empang. Kampung Blok Empang which is located on the coast of North Jakarta has a port setting and is bypassed by tourist access to the Kepulauan Seribu, so it is interesting to know how the behavior setting in this village is. Data collection is done by field observation and secondary data. The approach used in this research is deductive-qualitative with the research variables in the form of behavior setting. The Behavior Setting in Kampung Blok Empang is shown by how the setting of the urban village located in the port area affects most of the relationships between physical objects and the behavior of residents in the village. The best performance of behavior setting in Kampung Blok Empang is shown in the open space because its milieu-behavior interdependency. It is shown by the repetitive behavior in this specific milieu. The spatial Pattern type is formed by the collective activity of residents and the sea condition. They were characterized by the repetitive activities within their economic and social aspects.
Analysis of Disaster Mitigation in Carita with Environmental Learning in Elementary School
Authors: Rahmayanti H , Soesilo T E B , Sari D A P , Ichsan I Z , Kurniawan E , Titin  , Dasmo  , Hermawati F M , Singh C K S , Rogayan D V , Rahman Md M
Published: December 2021

This study analyzes the profile of Carita people in the efforts of tsunami disaster mitigation and the role of environmental learning in coping with the disaster, then analyzes the use of environmental learning. The method used is a mixed method of qualitative and quantitative methods. The quantitative method measures various community readiness levels in performing disaster mitigation, whereas the qualitative method is utilized to obtain various further information from the communities using interview technique. There were 88 randomly selected respondents participating in this research. The study results indicate a low land utilization density (below 33%). Indicators suggest a good category, namely: people evacuate when a disaster occurs (86%), rescue during a disaster (96.59%), and try to find new livelihoods (82.95%). In addition, public knowledge of disaster evacuation route is at a good level (87.50%) and there is an increase of 39.77% respondents with improved knowledge after the tsunami disaster occurred. Environmental learning, in this case, plays an important role to provide information to the public relating the efforts in disaster mitigation. The conclusion is that community’s disaster mitigation readiness still requires some improvement through various efforts, one of them is environmental learning with learning media in elementary school.
Spatial Analysis of Universitas Indonesia (UI) Urban Forest Microclimate and Its Biodiversity
Authors: Nadia Z , Warno S , Waryono T
Published: December 2021

Universitas Indonesia (UI) Urban Forest is located in the middle of an urban area. Vegetation analysis is one way to define the vegetation health to reach the urban forest sustainability. On the other hand, the vegetation analysis in UI Urban Forest was done thirteen years ago and needed to be updated. Moreover, there has not been vegetation analysis yet of UI Urban Forest using remote sensing combining the microclimate also biodiversity. This research method combines remote sensing and primary data collection. It classify the Landsat 8 (OLI) to the NDVI as the unit analysis (low, medium, high). Primary data collection started by random stratified sampling with a sampling intensity of 0.77% (18 plots), where in each plot, the temperature-humidity was measured, and the vegetation and bird were identified. As a result, the map of temperature and humidity was produced, and it correlates to the vegetation cover where the vegetation is high, the temperature is low, and the humidity is high. On the other hand, the vegetation structure and composition were analyzed. In conclusion, there is a significant difference between the NDVI vegetation class to the UI Urban Forest microclimate and its biodiversity (vegetations and birds).
Suitability of Post-Disaster Coastal Land Cover with Spatial Pattern Plan of Palu City
Authors: Wirawan R R , Hasibuan H S , Tambunan R P
Published: December 2021

The population growth in Palu City has implications for increasing the need for developed land, especially after complex natural disasters in 2018. After these disasters, another impact was the need for the construction of temporary and permanent housing. Therefore, it is essential to adjust the land use with disaster-prone zones. This study aims to analyze the distribution of land cover in the Disaster-Prone Zone and the suitability of the Spatial Plan with the Disaster-Prone Zone. The method used is quantitative through spatial analysis using ArcGIS 10.5 software. The results showed that Disaster Prone Zone 2 is the most dominating zone in both the type of built-up land cover and vegetation so that it still had development opportunities. However, the suitability of the Spatial Planning with Disaster Prone Zone shows that Disaster Prone Zone 4 is still included in the spatial plan as a developed area.