bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Jones polynomial in systems with periodic boundary conditions
Authors: Barkataki Kasturi , Panagiotou Eleni 
Published: March 2024

Abstract
Entanglement of collections of filaments arises in many contexts, such as in polymer melts, textiles and crystals. Such systems are modeled using periodic boundary conditions (PBCs), which create an infinite periodic system whose global entanglement may be impossible to capture and is repetitive. We introduce two new methods to assess topological entanglement in PBC: the Periodic Jones polynomial and the Cell Jones polynomial. These tools capture the grain of geometric/topological entanglement in a periodic system of open or closed chains, by using a finite link as a representative of the global system. These polynomials are topological invariants in some cases, but in general are sensitive to both the topology and the geometry of physical systems. For a general system of 1 closed chain in 1 PBC, we prove that the Periodic Jones polynomial is a recurring factor, up to a remainder, of the Jones polynomial of a conveniently chosen finite cutoff of arbitrary size of the infinite periodic system. We apply the Cell Jones polynomial and the Periodic Jones polynomial to physical PBC systems such as 3D realizations of textile motifs and polymer melts of linear chains obtained from molecular dynamics simulations. Our results demonstrate that the Cell Jones polynomial and the Periodic Jones polynomial can measure collective geometric/topological entanglement complexityin such systems of physical relevance.
Comparison of infiltration model performance based on basic infiltration rate for small watersheds in Papua region, Indonesia
Authors: Pristianto H , Suhardjono  , Suhartanto E 
Published: March 2024

Abstract
Research on soil water infiltration in equatorial climates like Indonesia is limited. Despite Papua accounting for 29% of Indonesia’s surface water, there’s a shortage of hydrological data. This study aimed to identify the best infiltration model tailored to the characteristics of basic infiltration rates in Papua’s small watersheds. Observations were made at 95 points across 11 small watersheds in Papua. Based on equatorial basic infiltration rate theories, analysis classified infiltration values against observation time. The performance of four infiltration models — Horton, Philip, Kostiakov, and Green Ampt — were compared. The results indicated the Philip model as superior, with average scores of 0.901 (R), 0.814 (NSE), and 0.424 (RSR), followed by the Horton and Green Ampt models. These three models showed excellent performance. However, the Kostiakov model was found lacking and needs modification. Further research on rapid and very rapid classifications is vital for enhancing infiltration rate predictions in small equatorial watersheds.
Time of concentration estimated of overland flow
Authors: Pramana Y H , Harisuseno D 
Published: March 2024

Abstract
Time of concentration (Tc) is a crucial aspect in the hydrological model, especially for determining flood discharge. Time concentration is the amount of time required for water to go from a watershed’s farthest point to its outflow. Although it is an important value, however, Tc does not have a universal equation that can be used as a reference. Based on the literature review, there are several concentration time calculation methods. Each method has its parameters and approach to produce varied values. Several experimental methods were applied to calculate concentration time at sites, among others are Kirpich, SCS Lag, and FAA. The calculation results are displayed in a dendrogram with group division by using the Euclidean approach. The calculation results show that the difference in Tc values can reach up to 500%, hence Grimaldi calls it a paradox in modern hydrology.
The analysis of degradation and aggradation of the riverbed: A case study of the Winongo River
Authors: Harsanto P , Hairani A , Yamanoi K , Ferdinanto G , Wisnulingga B K , Legono D 
Published: March 2024

AbstractThe Winongo River, with a soil base, makes it possible to experience sedimentation events. In rivers with groundsill for retaining sediment rate, the flow can occur, grinding sediment (degradation) or aggradation on the riverbed. This study was conducted in Winongo River to see the effect of groundsill on riverbed degradation and aggradation levels. This research was carried out using the MPM, Engelund & Hansen, and Laursen-Copeland equations in HEC-RAS 6.3.1 by dividing Winongo River into 71 points with a spacing of ± 500 m, including nine with groundsills. Based on the effect of the groundsill on the riverbed, the cross sections at its upstream and downstream tend to experience quite different riverbed elevation changes. Conditions in the upstream groundsill tend to experience aggradation while the downstream experiences degradation. The three equations modelling results show that MPM and Engelund & Hansen equations are closer to field conditions than the Laursen-Copeland equation. The use of D50 sediment to model changes in riverbed elevation is more likely to experience degradation because the average grain size of D50 in this study sample was 0.82 mm.
Evaluation of Kuncur water springs water quality in Sumberbening Village Ngawi Regency
Authors: Dewi V A K , Yulistyorini A , Siswahyudi D , Mujiyono  , Rahayuningsih T 
Published: March 2024

Abstract
Residents’ wells drying up during the dry season cause drought in Ngawi Regency. Kuncur water springs are one of the water sources that continuously drains water every time, but the water has a salty taste and is suspected to contain sulfur. This research aims to analyze the quality of Kuncur water springs and recommend using water according to the community’s needs. The research occurred at Kuncur water springs, Sumberbening village, Bringin sub-district, Ngawi regency, East Java, from April to September 2022. The method used is the analysis of water quality samples in the field and laboratory. The results showed that all parameters met quality standards (Regulation of the Minister of Health of the Republic of Indonesia number 492/MENKES/PER/IV/2010) except for the total dissolved solids, coliform, and E. Coli. Kuncur Spring is proven to contain sulfur. The recommendations for water use at the Kuncur water spring restrict its use to bathing and washing activities and prohibit its use as a drinking water source.
Land inventory and designation of the Kranji river riparian zone in Purwokerto city, Central Java
Authors: Sholichin M , Prayogo T B , Susilo H 
Published: March 2024

Abstract
River banks are virtual lines of the riverbed designated as river protection boundaries. This research aimed to inventory the Kranji Riverbank’s land condition and conduct a study to determine the width of the riparian zone. The methods used were field surveys, identification of land along the 11 km river, and analysis of flood discharge designs with a return period of 10 years. The results of an inventory along the river on the river land dominated the permanent building. There are 400 building units included in the repair zone on the Kranji River. Based on the planned flood analysis results with a return period of Q10 years of 38.11 m3/s, there are 160 flood points along the river. The width of the riparian zone in urban areas is 10 meters in East Purwokerto, while outside urban areas, it is 50 meters in Baturaden District. The benefit of the results of this research is the provision of initial data for coordinating with several other agencies in efforts to implement the Kranji River border in the future.
A GIS-based approach to determine the priority area for rainwater harvest in Kupang
Authors: Syarifuddin M , Masria  , Oktaviantoro D 
Published: March 2024

Abstract
Kupang, a pivotal economic and administrative hub in Nusa Tenggara Timur, Indonesia, faces recurring droughts resulting in crop failures, food insecurity, and health problems. Addressing this water crisis entails rainwater harvesting as a potential solution. This study establishes a comprehensive framework for prioritizing rainwater harvesting areas in Kupang. Using the weighted overlay method and open-source GIS software, our approach involves three stages: identifying drought and flood priority zones, defining suitability indicators, and quantifying the potential of rainwater harvesting systems. By leveraging climatological, geological, and hydrological information, we determine priority areas for drought and flood management. Our analysis of rainwater harvesting suitability integrates climatological information, land use and land cover mapping, runoff potential assessment, and water use index. Quantification of rainwater harvesting system requirements hinges on rooftop area and population data. The entire wards in Kupang are classified as high priorities for drought mitigation. Therefore, rainwater harvesting is a viable strategy for all wards. The most prioritized and in-demand wards, Oesapa, Sikumana, Lasiana, and Liliba, have the potential to install a minimum of 12,000 rainwater harvesting systems, each with a 1500-liter volume barrel.
Rainfall trend analysis to the change of flood discharge estimation in Bengawan Solo River
Authors: Nurhakim A , Widyaningrum D , Farid M , Prasetyo A , Moe I R , Chaidar A N , Hartanto I M , Sihombing Y I , Adityawan M B 
Published: March 2024

Abstract
Bengawan Solo Watershed is the largest watershed on Java Island, which also has fluctuating rainfall. The fluctuating rainfall may cause an alteration to the river discharge. The alteration can be analyzed through the SCS-CN model and Synder Unit Hydrograph. SCS-CN Java Island, which also has fluctuating rainfalis a well-known model in hydrological modeling that is commonly used because of its simplicity, stability, and predictability. Synder Unit Hydrograph is suitable for ungauged basins and may be used in watersheds about 25 km2 to 25.000 km2 (Sudhakar BS et al, 2015). The analysis and calibration were performed from the baseline data (2001-2022). The trend analysis was carried out by comparing the analysis results from data sequences with a ten-year range with the baseline data. According to the trend analysis, the rainfall design of the Bengawan Solo watershed has increased by approximately 4–6% in 2013–2022 compared to the baseline (2001-2022), which may lead to a 10% increase in flood design discharge in Bengawan Solo.
Analysis of factors affecting the intake gate operations of Gerokgak Reservoir for command areas of Subak Gede
Authors: Indrayana I B G , Nurrochmad F , Pratiwi E P A 
Published: March 2024

Abstract
Subak Gede in Gerokgak Village, Buleleng, practices traditional irrigation in Bali based on Tri Hita Karana principles. Subak sources water from Gerokgak Reservoir, where intake gate operations depend on three factors: the recent ten-day discharge (item 1), rainfall in command areas (item 2), and crop type (item 3). Quantification Analysis I simulated the intake gate from 2019 to 2022, comprising Models A to D, each using yearly data for its respective year (2019, 2020, 2021, 2022), and Model E using four years of data. Items 1 and 2 had high, moderate, and low categories; item 3 had paddy, palawija, paddy-palawija, and fallow categories. The simulation exhibited strong correlations between predicted and recorded discharge of every quantification model, with R-total > 0.6, varying for each sample year. Based on the analysis, the three items showed a different impact every year, depending on the item-category distribution and variation. Notably, due to its sample, quantification Model E excelled in predicting intake gate operations for other yearly data, including its own sample year.
Correlation between volume weight, porosity and moisture content in Central Kalimantan’s Peatlands
Authors: Novrianti  , Harisuseno D 
Published: March 2024

Abstract
Peat is determined by soil characteristics consisting of maturity, color, low PD, low BD, texture, and organic content, which are different from mineral soil types, which can store more water with relatively high porosity, can decrease if drought due to lack of peat wetting with fiber spaces blackish brown with a fine structure. The purpose of this study was to determine the physical and chemical properties of peat as a water storage container and to determine the correlation between volume weight, porosity, and water content. The method used is a descriptive method, Sieve analysis, using ring samples and eagle auger camp. Laboratory results show that the BD value is small, the PD value is small, the water content value is high, the peat has maturity levels of Sapric and Hemic, and the texture consists of coarse sand, medium sand, and fine sand > of dust, no silt or clay, has a relative ash content low, high organic matter. The correlation is that when the BD and PD values are low, high water content means high porosity, large water storage, drought easily during the dry season, so fires easily occur.
Characteristics of hydrogeological aquifer in potential lime stone by analysis pumping test in Campurdarat District, Tulungagung Regency, Indonesia
Authors: Chandrasasi D , Prasetyorini L , Yuliani E 
Published: March 2024

Abstract
Extraction of clean water from dug wells and drilled wells is a source of water that is obtained locally without buying, for example, clean water from the Drinking Water Company (PAM). Surface water and groundwater are generally used frequently, even though the utilization of groundwater is not optimal compared to surface water. One way to determine the potential of groundwater contained by aquifers or aquifer discharge is by pumping test wells. In this test, water is pumped to the surface through a test well dug into the designated aquifer. The purpose of this study is to determine the characteristics of hydrogeological aquifer of limestone by the pumping test analysis approach using the Theis and Cooper - Jacob methods in Campurdarat District, Tulungagung Regency. Pumping tests have been carried out on two observation and production wells with the results of the Theis method showing a transmissivity (T) of 73,193 m2/day, storage capacity (S) of 1,080×10-3 and hydraulic conductivity (K) of 1,220 m/day while Jacob shows a transmissivity (T) value of 71,682 m2/day, storage capacity (S) of 0.4512 and hydraulic conductivity (K) of 4,667 m/day. The Theis method was chosen because it has a relative error smaller than Jacob method, namely 29.77%.
Variable analysis for supporting reservoir impounding modeling
Authors: Rahmawati H R , Juwono P T 
Published: March 2024

Abstract
The impounding stage of the reservoir is a stage after the implementation of dam construction is finished. The process of reservoir impounding is started by closing the tunnel diversion gate and the elevation of the water level will be moving up slowly. The speed of the increasing reservoir water level elevation is affected by the dry season or rainy season, so it is arranged in such a way for obtaining the daily increase is not more than 1.0 m/day, due to dam safety. This research intends to build this modeling, at first by studying which variables are affecting in order to get the safe period of impounding. The methodology consists of a correlation analysis of inflow, outflow, and the ratio between storage volume and inflow volume to the optimal impounding equation. The statistical hydrology approach is used in this modeling that will assess the 7 observed reservoir impounding which is started from base elevation until Full Supply Level (FSL). This modeling will help in decision-making about the selection of the safe and optimal period of reservoir impounding. At the end of impounding, the reservoir will be full and it starts to be allocated regarding the utilization that has been designed.
Reservoir water budget estimation using satellite and ground measurement data
Authors: Wahyuni S , Berlian R.S , Widiarti W.Y , Wiswamitra K.A 
Published: March 2024

Abstract
Rising air temperatures, increased rainy runoff, reduced dry season runoff, and severe weather conditions have intensified floods and droughts, significantly affecting the reservoir water supply. The accuracy of reservoir water balance is crucial for meeting water needs. The study compares satellite data and ground measurements to analyze the water budget of Sutami Reservoir in Indonesia. Satellite data collected included precipitation (Tropical Rainfall Measuring Mission-TRMM) and evaporation (Global Land Data Assimilation System-GLDAS). The water balance approach was utilized to analyze the water budget. The suitability tests used were Root Mean Square Error (RMSE), Nash-Sutcliffe Efficiency (NSE), Correlation Coefficient (CC), and Relative Error (RE). The study revealed that the data from TRMM and GLDAS satellites closely resembled ground measurements. The reservoir water balance analysis revealed that satellite data aligns with ground measurements, indicating water shortages in the dry season and excess water in the rainy season. Satellite data is particularly beneficial for watershed management in areas lacking ground measurement equipment, as it can be analyzed for various purposes.
Performance assessment of existing canal-blocking in restoration management of peatland conservation
Authors: Yakubson  , Sumiadi  
Published: March 2024

Abstract
The aim of this research is to assess existing results of the canal-blocking peatland conservation due to the classification of 5 canal-blocking types on peatland conservation as the management of restoration in the peatland area of Block-C ex-PLG. The low water levels (>40 cm from the surface) during the dry season make dry peatlands susceptible to fires. The back wetting of peatland is the early effort in preventing the peatland fire, which can be carried out on a wide scale by exploiting the available canal network through the overall and integrated canal blocking in unity of peatland hydraulics. The canal blocking due to the five types of canal blocking classification, which is intended to back the discussion of peatland, can give the ecology and society economic impacts that include supporting the natural vegetation recovery, preparation of water supply along season on the peatland hydrologic unity, and to be preventing drought and also the fire that are often happened in the dry season. Land use is suggested based on customization: agriculture and plantation in designated areas, adaptive vegetation in limited plantation zones, and protected areas restored to serve as safeguarded vegetation zones.
Protective Measures for Scouring Effects in Serayu Micro Hydro Integrated Barrage
Authors: Zulfan J , Wardhana M S , Saputro C I , Ginting B M 
Published: March 2024

Abstract
Adding a new micro hydropower component to an established barrage, such as the Serayu Barrage in Central Java Province, poses significant structure risks and potentially compromises the stability of the structures. To mitigate these negative impacts, physical modeling was conducted at our hydraulic laboratory to accurately replicate 600 meters of the Serayu River, including the 110-meter-wide Serayu Barrage structure at a scale of 1:40. Multiple scenarios were examined to simulate hydrodynamic conditions and sediment transport along the barrage structure. Notably, downstream scouring conditions were identified as a crucial parameter affecting the structure’s stability. Results obtained using a design discharge of 2,470 m3/s revealed concerning findings, with an observed 4 to 6 meters deep scouring downstream near the end sill of the weir. Immediate mitigation measures using riprap are imperative to prevent further damage to the weir structure. This paper investigates several configurations for riprap protection to address the scouring problems. After implementing a full riprap arrangement downstream of the end sill, the scouring depth was reduced significantly and pushed far downstream. Looking at it from an economic standpoint, placing a full riprap configuration for downstream protection is a more financially efficient option over an extended period.
Identification of the characteristics of the physical vulnerability level of the Kendari Bay coastal landscape to tidal floods using the Quantum Geographic Information System
Authors: Hadini L O , Hidayat A , Khairisa N H , Nurgiantoro  , Aba L 
Published: March 2024

Abstract
Kendari City has a coastal stretch that runs into the sea and is feared to be vulnerable to tidal floods. This study aims to identify the tidal flood vulnerability of the coastal landscape of Kendari City, especially in terms of its relationship to the characteristics of the physical aspects of the landscape, distribution mapping, and the extent of tidal flood vulnerability areas in coastal areas. The research method uses spatial descriptive analytics to explain the tidal flood phenomenon in relation to physical aspects of the coastal landscape such as topography, distance from the beach, distance from rivers, and land use aspects. The data collected consists of primary data in the form of observation data on the physical aspects of coastal areas and secondary data in the form of satellite image data and data from related agencies. The analysis technique for describing tidal flood vulnerability uses buffer and overlay analysis, assisted by the QGIS application. The results of the research showed that the level of physical vulnerability to tidal flooding was obtained by three vulnerability classes and their areas: low physical vulnerability at 17,096.82 ha, medium physical vulnerability at 8,169.69 ha, and high physical vulnerability at 1,722.17 ha.
Experimental effect of wind and heavy rain on increased splash erosion using rainfall simulator
Authors: Fidari J S , Zahira N A , Hadiansyah M S N , Fitria R R , Hartoyo R P 
Published: March 2024

Abstract
To investigate the erosion process that occurs, rainfall simulation is used with a model scale for natural rain events in laboratory conditions. The calculation of erosion and any soil erosion with a slope setting of 5% was carried out experimentally on a laboratory scale using a rain simulator and adding wind using a 2-inch snail blower. Experiments carried out in the laboratory included erosion tests driven by rain and erosion tests by rain, which were given additional wind variables. Rain intensity used for testing is using discharge 1 litre/minute,1.5 litre/minute, and 2 litre/minute as a representative variation of rainfall. The occurrence of rain and wind simultaneously within a certain period will cause greater loss of soil. Although many studies have been conducted on the effects of rain and the combined effects of wind on soil erosion, only a limited number of studies have focused on the combination of the two variables that occur together. The results showed that in the applied rain intensity and wind factor, the collision of the kinetic energy of the rain driven by the wind resulted in higher erosion when compared to that without the influence of the wind.