bluuebunny/crossref_metadata_2025_split huggingface dataset:
Static and Pseudo Static Analysis of Embankment Slope Stability of Bener Dam, Purworejo Regency, Central Java
Authors: Ranysakol Thuon 
Published: October 2023

Abstract
The Bener Dam is considered as one of the largest rock-fill dams in Indonesia. This dam will impact the inundation area of three main villages in the Wonosobo and Purworejo regency. Since this zoned embankment dam consists of rock-fill and the core material, the stability of the dam slope has to be done to ensure that the dam is stable against any failures including the seismic effects. Moreover, the seismic coefficient in the study area in the seismic analysis of the large dam slope is needed to be used in the analysis which is not yet done from the previous studies. This paper presents the analysis of the embankment slope stability of the Bener dam under static condition and pseudo static condition. The analysis takes into account the end stage of construction, the steady-state stage, and rapid drawdown stage. The results of utilizing the Finite Element Method to analyse the slope stability demonstrates that the dam embankment slopes are stable under static and seismic stress conditions in all the reservoir condition stages. After applying the seismic loading, the result of safety factor of slope stability is reduced while the rapid drawdown stage has the lowest safety factor.
Lithium Extraction from Geothermal Brine Using Electrodialysis Method
Authors: Jati A D , Sujoto V S H , Sutijan  , Petrus H T B M , Mulyono P 
Published: October 2023

Abstract
The global market share of electric vehicles is expected to increase significantly. The lithium-ion battery is one type of battery that can power electric vehicles because light, inexpensive, has a high energy density, and has a long service life. Lithium may be obtained economically from hard rock ores and brines. Indonesia has a huge geothermal potential and lithium concentration in geothermal brine can reach 70 mg L−1. With the high concentration of lithium in brine, this is a great opportunity for Indonesia to produce lithium independently. The separation of lithium from brine can be separated by various methods. One method that has high effectiveness is by using the electrodialysis method. This study will extract lithium from geothermal brine with the electrodialysis method using monovalent membranes. Anion exchange membrane (AEM) and cation exchange membrane (CEM) are used in this system. The recovery solution to collect lithium from brine is HCl 0,1 M. We variate the voltages (2 volt and 3 volts) to see the effect on flux and conductivity. From the experiment, the 3 volts give more flux and conductivity than the 2 volts. The 3 volts has 10 mL cm−2 h−1 of flux and 2110 μS cm−1 of conductivity while the 2 volts has 4 mL cm−2 h−1 of flux and 1770 μS cm−1 of conductivity. The higher voltages given to the system, the easier separation can be done.
Mineralogical Distribution and Characteristics of Fe-, Ti-, and V-Bearing Beach Ironsand Deposit in Adikarto Bay Kulonprogo, Yogyakarta, Indonesia
Authors: Harahap L M L , Idrus A , Ernowo  , Sukadana I G , Suwahyadi  , Handayani T 
Published: October 2023

Abstract
Identification of beach sand deposits was carried out in the south coastal area of Adikarto Bay, Kulonprogo, Yogyakarta in Indonesia. A total of 25 points were observed to identify the characteristics and mineralogy of beach sand related to the iron (Fe), titanium (Ti), and vanadium (Fe) bearing minerals that have an important role in the transition of fossil energy into clean energy as an energy storage technology known as Vanadium Redox flow batteries (VRBs) and lithium-vanadium-phosphate batteries [1]. Laboratory analysis was performed by mineral grain analysis, ore microscopy, and micro-XRF. Based on the mineralogical analysis, the beach sand deposit is composed of heavy minerals (magnetite, titanomagnetite, and hematite) and light minerals (quartz, clinopyroxene: hedenbergite and augite), biotite, hornblende, and ilvaite. The results of the analysis show that the distribution of heavy minerals is dominantly in the fraction size <0.106 mm (70-80%,) while light minerals are distributed in the fraction size 0.212-2 mm (80-90%). Mico-XRF for elemental analysis identification shows that magnetite is the mineral bearing of Fe, Ti, and V elements with a percentage of (79.02 - 92.43 wt%), Ti (6.08-7.89 wt%), and V (0.56-1.15 wt%). Therefore, it is important to characterize the mineralogy and distribution of magnetite, since it can be used as a “mineral pathfinder” for advanced exploration of Fe, Ti, and V elements. So, the ironsand is for the cement indsutry and has advanced utilization.
Real Time Monitoring Using Robotic Total Station on the Outlet Slope of the Cisumdawu Tunnel, West Java
Authors: Prasetya R B , Hendarto H 
Published: October 2023

Abstract
Slope failure is still possible even though the slope has been designed and reinforcement has been carried out, as an example the slope of the Cisumdawu Tunnel Outlet which collapsed in October 2021. Therefore, monitoring technology is needed to anticipate slope collapse. In this study, the repaired slopes of the Cisumdawu Tunnel Outlet was monitored using a Robotic Total Station (RTS) to measure surface displacement in real time. Monitoring using RTS was carried out for approximately 40 days. The purpose of this study is to determine value and characteristic of slope displacement using an empirical approach from previous researchers. The displacement starts April 23rd at night until it reaches stability on April 24th 2022. The most significant displacement occurred in the prism target 08 which is located in the foot of slope and between the twin tunnels. It has 8 mm longitudinal displacement, the transverse displacement is 0.8 mm and the height has dropped by 13 mm. Almost the rest of the prism is in a stable state. From this study, the slope movement class is found to be regressive and categorized as velocity < 15 mm/day which is no failure expected within 48 hours. From this study, it was concluded that during the monitoring period using the RTS the outlet slope of the Cisumdawu tunnel was safe
Menoreh Mountain sustainable tourism development: a spatial outlook
Authors: Reinhart H , Rafida M R , Sofie T 
Published: October 2023

Abstract
Increasing development of geotourism and Geopark raises awareness of more environmental-friendly and sustainable tourism which can be approached using spatial analysis. This paper aims to connect the spatial element with sustainability tourism in Menoreh Mountain and formulate sustainable tourism development. Using Moran’s Index, this study examines the Geo-tourism site’s spatial characteristics and how the development should be done based on that analysis. For the result, 120 sites have been collected through Google Maps data and a field survey for validation. The sites comprise caves, waterfalls, pine forests, summits/peaks, and religious sites. By plotting the density of the tourism destination to a certain village, the Global Moran’s Index for it is 0.318. The Univariate Local Moran’s I show 10 villages in the High-High quadrant, 4 villages in the Low-High quadrant, 3 villages in the High-Low quadrant, and 2 villages in the Low-Low quadrant or cluster. Based on the spatial pattern, it is crucial to focus on the characteristic of each quadrant to establish sustainable tourism comprising economic and geological, and ecological sustainability and strengthen the spatial policy. The characteristics of each cluster also become a basis for developing strategies regarding the administrative division of Menoreh Mountain.
The Linkage of Rainfall Anomaly due to El Nino Southern Oscillation (ENSO) on Cassava Productivity in Central Java Province
Authors: Firmansyah Anugrah Jorgi , Nurjani Emilya 
Published: October 2023

Abstract
El Nino Southern Oscillation (ENSO) is a global climate phenomenon that affects the climate of a region and causing climate anomalies. ENSO can cause rainfall anomalies that have an impact on the agricultural sector. Cassava is one of the plants known as climate-resistant plants. Cassava has high productivity and is almost evenly distributed in Central Java Province. This study aims to determine the relationship between rainfall anomalies due to ENSO and cassava productivity in Central Java from 1990-2019 at each different ENSO phase. El Nino in weak, moderate, and strong phases triggers a decrease in annual rainfall intensity with an even distribution from the north and becomes softer towards the south of the province. When La Nina begins, the intensity of rainfall increases with a strong intensity starting from the south side and weakening towards the province’s north. The increase in rainfall during the La Nina phase tends to increase cassava productivity and the El Nino phase tends to decrease cassava productivity, although there are case findings in certain areas.
Dynamics of Land Use Change and The Relationship with Food Sufficiency in Pacitan Regency
Authors: Pramesti Revia Ardyaning , Harini Rika 
Published: October 2023

AbstractInfrastructure development in an area affects changes in existing land use, one of them to meet demand in development. Agricultural land use change can affect agricultural production and productivity. This study aims to determine the conditions of land use change and food sufficiency in Pacitan Regency and the relationship between the two variables. The data used in the analysis are data on land use and food production from 2009-2017 to calculate food sufficiency. The research method is quantitative descriptive with Pearson correlation statistics. The results showed that agricultural land use in Pacitan Regency was dominated by dry land agriculture. Paddy fields and dry land agricultural have decreased, while non-agricultural land has increased. The food sufficiency of the four food commodities, namely rice, corn, sweet potatoes, and cassava, has fluctuated in recent years. However, the overall condition of food sufficiency from 2009-2017 decreased from 6.48 in 2009 to 5.04 in 2017. Based on the Pearson correlation test results in Pacitan Regency, there was no connection and significant relationship between land use change and food sufficiency. This result can occur due to an increase in population, changes in the cultivation of food crops into woody plants, changes, and a decrease in land productivity.
An Ecological Study of Karst Landscapes Around the Jalur Jalan Lintas Selatan (JJLS) of Gunungkidul Regency
Authors: Astuti B I D , Haryono E 
Published: October 2023

Abstract
JJLS is a newly constructed highway connecting the southern area of Java. Along the Gunungkidul Regency trace, the road crosses protected karst landscape of Gunungsewu. This study aims to analyze landscape change during 2005-2020 period after the construction of the highway. Landscape change was analyzed by using Spatial Landscape Impact Assessment (SLIA). The data used for this research were Landsat 7 ETM+ images, google earth images, and Sentinel 2A images. The result study shows that the construction of JJLS has changed the landscape structure within the radius of 100 road sides. The change is mostly land use and landforms duty cut and fill activity. JJLS Road construction produces a very high impact on environmental sustainability. The trickle down effect must be controlled in the future development in order to ensure not to deteriorate environmental and water resources.
Differences in soil-water characteristics of monoculture oil-palm plantations, agroforestry oil-palm plantations and natural forest
Authors: van Oosterhout M. J. , Marhaento Hero , Booij Martijn J , Ridho Darmawati 
Published: October 2023

Abstract
This study aims to determine the soil water retention curves and infiltration rates for three different land use types located in Jambi province, Sumatra, Indonesia: natural forest, monoculture and agroforestry oil palm plantations (divided into new agroforestry (2,5 years) and old agroforestry (over 10 years)). Data on the infiltration rate of the soil for the different land use types was collected by using a double infiltrometer. A Horton curve was fitted to these measurements. The results on the soil water characteristics were compared between all land use types. This concluded that there is a significant difference in constant infiltration rate between the value of the natural forest and the new agroforestry and the value of the other land use types. The forest also has a significant smaller porosity. The results of the study concluded that plantations have a bad influence on the soil characteristics investigated, but in general agroforestry has a less bad impact than monoculture. However, this is highly dependent on the features of the locations investigated.
Characteristics of entrenched meanders in catchment landscapes: a case study of Java, Indonesia
Authors: Raharjo Puguh Dwi , Haryono Eko , Anggri Setiawan M. , Permana Haryadi , Farisan Ardhan 
Published: October 2023

Abstract
The diversity of physiography on the island of Java reflects the existence of different landforms that have properties and characteristics in the interaction of river formation. Rivers respond to longitudinal profile deformation, one of which can form river meanders. Meander rivers in Java are formed on alluvial plains (free meanders) and in hilly areas (entrenched meanders). The meander river formation factor is the high flow volume, which can be seen from the morphometric conditions. This study aimed to determine the morphometric characteristics of water catchment in entrenched meander rivers on the island of Java, as well as its relationship with the geodynamic conditions. The method used is the identification of entrenched meander rivers on Java Island, and morphometric calculations are carried out; besides that, it is also associated with morphostructural conditions to determine the process of its formation. The results obtained that the catchment area of the entrenched meander river has a tendency for small volumes of water and relatively longer floods; this is different from the nature of the free meander. The morphostructure much controls the process of forming entrenched meander rivers.
Groundwater quality analysis using water quality index in Wonosari basin, Gunungkidul regency-Indonesia
Authors: Bagaskara R A , Widyastuti M 
Published: October 2023

Abstract
Wonosari Basin is a physiographical unit in Gunungkidul Regency, Indonesia, that has enormous groundwater potential. Limestone inside the basin and dense population can harm the environment. The research aimed to analyze the groundwater quality in the Wonosari Basin based on the applicable quality standards, determine the water condition using the Water Quality Index (WQI), and determine the spatial pattern of the WQI grade. The total sample used in this research is 21 samples. Total Dissolved Solid (TDS), pH, Iron (Fe), Manganese (Mn), Sulfate (SO4), Nitrate (NO3), Hardness (CaCO3), and Total Coliform values of the groundwater samples were inputted to the weighted arithmetic WQI using Microsoft Excell to analyze the water quality. The spatial analysis was carried out using the cross-tabulation method with Microsoft Excell. The water quality standard used in this research is Regulation of the Minister of Health of the Republic of Indonesia number 23 of 2017. The research result showed that total coliform is the only parameter that exceeds its maximum acceptable presence, WQI values indicate that most of the groundwater samples have good quality, and the spatial pattern of water quality follows the population density.
An Isotopic Approach to Investigate Seepage in Dam: Case Study Ciawi and Sukamahi Dry Dams, West Java, Indonesia
Authors: Dewi F K , Wilopo W , Azwartika I 
Published: October 2023

Abstract
Seepage control in the dam is vital in maintaining dam safety. It is important to determine the source of seepage water to be controlled so that there is no excessive seepage that threatens dam stability. This study used Physico-chemical parameters and stable isotopes (δ2H and δ18O) to determine groundwater characteristics, the groundwater origin around the dam, and the connectivity of the Ciawi and Sukamahi Dry Dam’s seepage with surrounding water sources. This research shows that the groundwater in the study area includes freshwater with TDS values varying from 62 ppm to 189 ppm and EC values from 62 μS/cm to 414 μS/cm. The results of stable isotope analysis showed that the composition of seepage and groundwater sources around the dams are around the local meteoric water line (LMWL); this indicates that groundwater is more influenced by rainwater. Comparing the composition of δ2H and δ18O showed that the seepage water from the two dams has the same genesis as springs in Sukakarya Village (MA02) and dug wells in Gadog Village (SG13). This information is beneficial in determining the handling of seepage in the Ciawi dan Sukamahi Dry Dams.
Flood characteristics analyses in the Jratunseluna river basin due to the impact of Kedungsepur national strategic area development
Authors: Hanifah N H , Mawandha H G , Abiy F , Setyawan C , Kesuma L M , Rulisyani D S 
Published: October 2023

Abstract
The area of the Jratunseluna river basin is categorized as a high-risk flood vulnerability. The urban development plan can worsen this condition through Kedungsepur national strategic area. The objective of this study is to identify flood characteristics in Jratunseluna river basin caused by the alteration of land use due to Kedungsepur national strategic area development through rainfall-runoff 2D simulation. The RRI 2D model was chosen because it could simulate flood inundation comprehensively in all river systems while the other models such as HEC-HMS, TOPMODEL, and Tank models have a limitation on it. The input data used for the RRI model were rainfall data, topography (DEM), and land use maps. The rain data used in the simulation was the Global Precipitation Measurement (GPM) from 2010 to 2020. The study results indicate that the flood risk level would increase during the implementation of the Kedungsepur national strategic area development. The flood duration and peak discharge increase mainly characterize the increase in flood risk. The most significant increase in peak discharge among the four outlets is obtained in the Garang watershed. In the case of a 2-year flood, the peak discharge increased by 44.91% from 262.18 m3/s to 379.92 m3/s and for the case of a 50-year flood, the peak discharge increased by 54.34% from 331.63 m3/s to 511.83 m3/.
Hydrological Potential Mapping to Generate Micro-Hydro Power in Code River
Authors: Hadi M P , Suarma U , Sumunar A A K , Girsang M R B 
Published: October 2023

Abstract
Fossil fuel energy utilization in Indonesia is consider high consisting of 65% coal sources and 20% fuel, while only 15% are generate from new and renewable energy sources. This number is critical due to the commitment to reduce greenhouse gases by 29% or 41% as declared Glasgow in 2021. Alternatives source of energy could be obtained from solar, wind, and water. The energy generate from those sources are consider intermittent, however, water utilization can be optimized by construct several weirs (small-scale reservoirs) to accumulate the rain water as a kinetic energy source to generate electricity. Only some part of the world, especially tropical Indonesia archipelago, has enough rain to generate energy. This research intends to measure the potency of Code River, representing small river in generating micro-hydro power. The Code River is representing a small river on the island of Java as part of the archipelago in Indonesia which has the characteristics of a river, a small water catchment area, and has high discharge input from rainfall because it is in the tropics. The weir is equipped with a penstock pipe, as water intake to the generator. The pipe inner diameter made of high-density polyethylene material can be 200, 300, 400, 500, 700, 800, 1,000 and 1,600 mm. Each pipe size can produce discharges of 0.42, 0.75, 1.62, 2.1, 3.1, 3.5, 6.0 and 24.0 m3/s respectively. The combination of discharge and head height will produce electrical energy (in watts). Based on hydrological modelling consisting of 52 sub-watersheds, the highest electricity production in 2021 is 8,359,218.3 kWh with 800 mm pipe size (3.5 m3/sec discharge). The electricity production is based on reliable discharge between 7-96% which is different for each weir location. In conclusion, the electricity supply for the whole year (100%) is inadequate
Typology of planned housing in the city of Yogyakarta
Authors: Widiyasuti D , Adhitama S Y , Ali B O , Aprillia B 
Published: October 2023

Abstract
This paper examined the planned housing in Yogyakarta City distributed in eight sub-districts, namely Umbulharjo, Tegalrejo, Wirobrajan, Mergangsan, Mantrijeron, Kotagede, Gondokusuman, and Jetis. Planned housing in Yogyakarta City can be classified into a gated community and a non-gated community. They were commonly identified based on the similarity and regularity of the buildings and the road network. The data was taken from their Building Permit (IMB; Izin Mendirikan Bangunan) from the year 2000 – 2019, Google Street View, Pleiades Satellite Imagery of Yogyakarta City in 2018, Google Map, and ArcMap base-map. Data analysis was undertaken by using satellite imagery, map interpretation, and quantitative analysis by using scoring technique to describe the score of typology. Most of the planned housing in Yogyakarta City are classified into Typology II, which had a medium-strength gated community characteristic. The typology was composed based on the physical-geographical and social-economic indicators. Most of them were more than 10 years old and were provided with walls/fences and portals to restrict outsiders’ access. The residents were classified into middle-class based on their social-economic status. Most of the planned housing in Yogyakarta have gated-community characteristics based on these features.
Association of mollusks and seagrass plants in Miang Besar Island, Kutai Timur Regency
Authors: Kaharuddin  , Imanuddin  , Harmiati  
Published: October 2023

Abstract
This research to determine the level of associet between mollusks and seagrass plants on Miang Besar Island. this research was conducted in june 2020 using random non sampling method consisting of 12 sampling points. For the retrieval of seagrass and mollusk data using the method of transek squares measuring 1x1 m2. testing the association between 2 types using. Contingency table 2 x 2 to determine the association level between 2 species with the Jaccard index. The association between seagrass and mollusk species was analyzed into 3 groups. positive associations are 31 pairs, negative associations consist of 30 pairs and unrelated associations consist of 35 pairs.