bluuebunny/crossref_metadata_2025 huggingface dataset:
Building Information Modelling Implementation in the Design Stage of Chinese Prefabrication Construction
Authors: Wang M , Wang C C , Sepasgozar S , Zlatanova S
Published: December 2022

Prefabrication construction has gained popularity in the construction industry during the last few years. Due to the complexity of prefabrication design, building information modelling (BIM) is adopted in the design stage to improve efficiency and accuracy. Many previous studies have examined the adoption of BIM in the design stage and explored the current practice of BIM adoption in prefabrication construction, however fewer first-hand investigations are made on assessing the adoption of BIM. This study aims to identify the opportunities and challenges of utilizing BIM technology in the design stage of prefabrication construction from the perspective of designers. A semi-structured interview was conducted for qualitative data collection and the data are analysed by thematic analysis. A total of eight designers from Chinese prefabrication construction projects were interviewed. The research identified 8 opportunities and 15 challenges of BIM adoption in prefabrication construction. The top four challenges are: (1) inaccurate prefabrication production drawings generated by BIM software, (2) late adoption of BIM in the design stage, (3) lack of communication platform for different designers, and (4) lack of sharing the updated design model among designers, manufacturers, and onsite engineers. These findings provide directions for improving BIM adoption in the design of prefabrication construction.
Digital Twin based built environment asset management services development
Authors: Moretti N , Xie X , Merino Garcia J , Chang J , Kumar Parlikad A
Published: December 2022

The Digital Twin (DT) concept emerged recently in the Architecture, Engineering, Constructions and Operations domain and the interest for digital built asset management service implementations is increasing. However, most of the applications are developed according to custom approaches, preventing the generalisation and modularisation. This article presents a methodological framework for DT-based applications development. DT-based applications support effective data-centric processes in the management of critical assets. The proposed approach is based on a flexible and federated data model, enabling dynamic data management. The federated data model provides an interface and connection among different knowledge domains. The service requirement definition provides the input specification for the application development, accomplished through the modelling of three fundamental components: data, processes, and algorithms. These components are assembled through Application Programming Interfaces (APIs), supporting the DT-based services. The proposed approach is applied to the West Cambridge DT research facility and tested in the building energy sub-metering strategy. The developed approach allows flexible and interoperable data-centric applications development, contributing to the generalisation and scalability of DT-based built asset management applications. This aims at providing a consistent approach that can be employed in different domains, where the DT technologies play a central role in service innovation.
A BIM-based model to study wayfinding signage using virtual reality
Authors: Goupil V , Gouranton V , Michaud A S , Gauvrit J Y , Arnaldi B
Published: December 2022

Wayfinding signage is essential in a large building to find one’s way. Unfortunately, there are no methodologies and standards for designing signage. A good sign system therefore depends on the experience of the signage company. Getting lost in public infrastructures might be disorienting or cause anxiety. Designing an efficient signage system is challenging as the building needs to communicate a lot of information in a minimum of space. In this paper, we propose a model to study wayfinding signage based on BIM models and the BIM open library, which allows the integration of signage design into a BIM model to perform analyses and comparisons. The study of signage is based on the user’s perception, and virtual reality is a tool that best approximates this today. Our model helps to perform signage analysis in building design and to compare objectively the wayfinding signage in a BIM model using virtual reality.
Establishing a Collaboration Model for BIM Training Program in Technical and Vocational Education and Training (TVET): A Vietnam case study
Authors: Hoai Le An Thi , Phung Quan , Nguyen Thi Xuan , Nguyen Tung Lam
Published: December 2022

This study presents an institution-industry collaboration model for BIM training with a case study of a TVET college in Vietnam. The model focuses on the most needed and practical skills to fit with the actual requirements of the labour market. It also helps to educate BIM technicians that meet the industry standards in a reasonable training time. In consultation with the industrial partners, the College defined six learning outcomes and 18 competencies for the BIM program to ensure that students can perform the BIM technician job when finishing the program. The findings present the benefits of the collaboration training model that could provide a better learning environment for students and help to narrow the gap between educational outcomes and industry needs. Furthermore, a questionnaire survey was conducted targeting the industrial partners and graduated students to assess the importance of the designed competencies. Feedback from the participants shows that collaboration and self-development skills are the most critical skills for the BIM technicians, so the BIM program should develop related courses aligned with the learning outcomes.
B-SMART: A Reference Architecture for Autonomic Smart Buildings.
Authors: Genkin Mikhail , McArthur J.J.
Published: December 2022

There has been increased interest in Smart and Ongoing Commissioning solutions to address the performance drift in existing buildings. Autonomous/autonomic systems are valuable tools to support the development such solutions, working towards a set of goals while sensing changes in their environment and adapting to them without human intervention. An autonomic approach to smart building design can thus maintain optimum energy efficiency while reducing operating costs. To support this development, this paper presents B-SMART: the first reference architecture for autonomic smart buildings to support smart commissioning. This research was informed by a comprehensive review of existing autonomic properties and domain-relevant autonomic properties and conceptual architecture. By decoupling conceptually distinct layers of functionality and organizing them into an autonomic energy optimization control loop, B-SMART facilitates the autonomic optimization of smart buildings.
Cascading disasters triggered by earthquake hazards: An infrastructure resilience approach
Authors: Sutrisno D , Suwarno Y , Turmudi  , Widodo A , Cipta A , Setyanta B , Darmawan M , Nahib I
Published: December 2022

A cascading disaster, which follows from an earthquake disaster, can result in a significant share of losses, in addition to the losses from the earthquake disaster itself. The scientific community acknowledges the necessity for theoretical and practical advancements on cascade events to give the information required for disaster management in the field, especially related to infrastructure resilience. This study aims to evaluate the resilience of residential buildings to cascading earthquake threats using a geological approach. Using spatial multi-criteria analysis of land instability based on geological approach and cascading disasters, the evaluation of building types based on earthquake resistance and cascading disasters was conducted. The south coast of Sukabumi Regency was used as the study site. The findings indicate that practically all structures in areas prone to cascading disasters are very susceptible to this hazard. Therefore, it is vital to arrange cascading disaster-prone areas and infrastructures utilizing the concept of mitigation and adaptation-based spatial planning.
Predicting coastal inundation triggered by the oceanic forcing across Jakarta Bay
Authors: Permana SM , Risandi J , Tito CK , Ramdhan M , Sufyan A , Solihuddin T , Purbani D , Pryambodo DG , Hidayat R , Rifai H , Lukman KM
Published: December 2022

Coastal inundation becomes a severe hazard to many world’s cities near shorelines. A recent publication by the Intergovernmental Panel on Climate Change (IPCC) in 2021 projected the increase in mean sea level and the probability of extreme waves in the future that would add more pressure to the cities like Jakarta, Indonesia. Hence, the estimations of the region’s vulnerability due to the hazard are critical steps for designing the adaptation measures. The study is aimed to spatially estimate the future coastal flooding in Jakarta Bay caused by oceanic forcing under the IPCC 2021 scenarios, including the High Highest Water Level (HHWL), the predicted sea level rise by 50 years, the extreme wave setup, and the infragravity (IG) waves. The spatial inundation is generated by projecting the estimated total water level to the Jakarta region’s Digital Surface Model (DSM) and further overlaid on the rectified Google Earth image. The result shows that the increase in water level due to climate change may reach ~1.8 m, increasing the spatial inundation area around the Jakarta shoreline by 37 %. Considering the severe impacts of the projected inundation, the decision-makers need to focus on adaptation efforts soon.
Flood resiliency approach for urban planning: critical review and future research agenda
Authors: Fitriyati N , Arifin H S , Kaswanto R L , Marimin
Published: December 2022

The paradigm shift in flood management from hard measure to soft measure tends to increase because current flood relief mitigation systems could not answer the flooding issue. The questions are how the concept of resilience in flood mitigation can be applied to urban landscape planning and how its prospect for future research. The purpose of this essay is to examine the paradigm shift in flood control in a number of countries, as well as the future prospects for a flood resilient strategy to urban landscape planning. A literature study was conducted on journal articles and other scientific articles related to flooding and resilience using PRISMA protocol to obtain a narrative and perspective of this paradigm shift. In the initial conclusion, the concept of flood resilience in several countries has proven to be applicable for flood mitigation, but it’s still facing an obstacle like the governance aspect (assignment of positions, roles, and responsibilities between actors). From 213 selected articles reviewed, only 32% of the research has the substance of resilience and urban planning. This means research on flood mitigation with a resilience approach is still needed for future urban planning. The expected impact, this paper can be used as input for existing urban planning and future research in landscape scale.
Disaster risk management based on local wisdom in handling natural disaster victims
Authors: Cahyono SA Tri , Kuntjorowati E , Hermawati I , Ikawati  , Rusmiyati C , Purnama A
Published: December 2022

Natural disasters that occur affect the welfare of the community. This study aims to examine disaster risk management based on local wisdom to minimize natural disasters’ victims. It was conducted in five districts and cities, involving 100 respondents and using mixed methods. The results of the study found a community-based disaster management forum called KSB (disaster preparedness village). KSB’s partnership with stakeholders in the form of pre-disaster technical guidance and emergency response is well established. In the pre-disaster stage, KSB provides an early warning system to condition community preparedness. In the emergency response stage, KSB handles disaster victims according to standard operating procedures. In the post-disaster stage, KSB helps manage aid, find sources of support, and maintain infrastructure in refugee camps. Disaster Alert Village (KSB) manages logistics, but has not provided socio-psychological assistance to victims, and does not have a granary and social substation, but has not found involvement of groups with special needs and vulnerable in handling disaster victims; It is recommended the need for active involvement, social protection for the special needs and the vulnerable.
Management and vulnerability analysis of the existing built-up area in the Pangandaran coastal area to the tsunami disaster
Authors: Nisaa R M , Nurmaya A
Published: December 2022

The rapid development of the coastal area for settlement and commercial service could increase vulnerability to natural hazards. This study aimed to analyze the settlement development management in the coastal area of Pangandaran Regency of West Java toward tsunami disaster risk mitigation. This study is essential because Pangandaran coastal area faces directly toward the subduction zone between Indo-Australian and Eurasian plates, which lead to tsunami hazard. For vulnerability analysis, spatial analysis was done through existing buildings and spatial planning documents. Recommendation for future management and mitigation to minimize tsunami impact on residential areas was formulated. The results showed that commercial and service zone dominated the land use in Pangandaran coastal area, followed by low-density residential zone, community forests, and mixed-use zone. The spatial analysis also showed that the existing land-use and spatial planning document did not consider the tsunami disaster risk. Hence, our recommendation provided the possible design solution for every potential impact of tsunami and mitigation approach to reduce vulnerability.
Analysis of flood prone areas in the Walanae Watershed, Dua Boccoe District, Bone Regency
Authors: Muspida A , Manaf M , Tantu A Gusti , Kastono  , Suriandjo HS , Hasbi  , Sudirman  , Widodo S , Abdulbar F
Published: December 2022

This research is important to do to improve flood disaster management in the Walanae Watershed, with the aim of researching and analyzing the most effective appropriate land use to reduce the risk of flooding and damage. This research was carried out in the Walanae Watershed, Dua Boccoe District, Bone Regency, South Sulawesi Province. Appropriate land use that is most effective in reducing the risk of flooding and damage is analyzed descriptively qualitatively with the Overlay approach. Assuming that the process produces data from the findings in the form of field observations. The impact of appropriate land use that is most effective in reducing the risk of flooding and damage is measured using the basic physical condition analysis method, this superimpose analysis is used to determine flood-prone areas based on several aspects and a qualitative descriptive analysis will clearly describe the impacts that have been caused by floods. The results showed that there are 8 sub-districts/villages that have the potential for flooding, including Unyi Village, Uloe Village, Pekkasalo Village, Kampoti Village, Tocina Village, Tawaroe Village, Solo Village, and Matajang Village. With an area of 131 km2, and an existing inundation height of ±100–200 cm and an inundation period of 10 hours, Dua Boccoe Subdistrict has the potential to be affected by flooding. Floods in Dua Boccoe Subdistrict are caused by internal factors: Topography, Drainage Infrastructure, Building Density, and Land Use and others as well as external factors: Topography, and Shipment Floods.
Ecotourism hazards governance in disaster-prone area of Gunung Rinjani National Park
Authors: Sunkar A , Muntasib E K S H , Rachmawati E , Haryoso A , Kristiawan R , Rushayati S B , Andriyanningsih S
Published: December 2022

Hazards management is essential in enhancing visitor safety assurance. Gunung Rinjani National Park is strongly associated with a variety of physical, and biological hazards. In an effort to become a world-class hiking trail, various stakeholders have shown increased engagement, yet, their coordination, collaboration and cooperation still need to be explored. Findings were derived from in-depth interviews and Focus Group Discussions with key stakeholders that were directly involved in managing disaster comprising of public, private and third sector hazard-related institutions, including local tourism actors to map their role and interrelationship. The findings revealed that hazard management has been considered in GRNP management. As many as 35 stakeholders have contributed to the risk management of Gunung Rinjani National Park. While all stakeholders were aware of the potential hazards, risk awareness varied. Weak integration mechanisms have been identified among stakeholders, with the principal underlying cause the lack of a coordinated Standard Operating Procedure. Most stakeholders acted only in accordance with their institutional SOPs as response phase was the most commonly observed actions. In addition, implementation of training has often proved to be non-sustainable. This research concluded that each stakeholder be responsible and transparent to ensure collaborative ecotourism hazards mitigation and risk reduction measures.
Building knowledge management for better policy and strategy of peatland restoration in Indonesia: inputs from stakeholders
Authors: Winarno B , Anjani R , Lestari S , Nugraha L M , Rochmayanto Y , Iqbal M , Sakuntaladewi N , Qirom M A
Published: December 2022

Tropical peatland in Indonesia experiences massive degradation due to the high pressures of anthropogenic ventures that triggered the disaster, which calls for peatland restoration. This restoration requires comprehensive knowledge in designing and transforming appropriate policy and has become a challenging part of peatland restoration. This research discusses the insights from stakeholders concerning knowledge management to support the policy and strategy of Indonesia’s peatland restoration. The survey was conducted on 72 respondents. Most of the respondents (95.8%) know about the existing tropical peatland in Indonesia. Respondents also elaborated on various sources of peatland knowledge through (1) online scientific search engine; (2) discussion and interview; (3) workshop and conference; (4) observation and experience. We found that 81.9% of respondents have a basic understanding of knowledge management, and 94.4% of respondents agree on the role of social media in knowledge management. Respondents highlighted some points for building knowledge management, including sharing knowledge mechanisms, exploring local knowledge, organizing knowledge, and building an informative platform. Collaboration work is the key in the digital era for this context. Utilizing social media would be an attractive package to shape the policy and strategy in raising public awareness, building networks, and improving sharing knowledge mechanisms.
The contribution of several sub-watersheds within the Garang watershed in supplying the floods on 6 and 24 February 2021
Authors: Pramono I B , Basuki T M , Priyanto E , Yulianto F , Fakhrudin M , Imaduddin F , Ramelan A , Ibrahim M H
Published: December 2022

The flood incident of Garang watershed on 6 and 24 February 2021 inundated some of Semarang City. Total area of inundated area is about 47% of Semarang City or 176 km2. A research was conducted to estimate the contribution of sub-watersheds in flood peak and flood volume, and to analyze the causes of the flooding and its solutions. The flood peak discharge was estimated using Rational method and flood volume using Curve Number (CN) method. Geographic Information Syatem (GIS) is used for calculating Runoff coefficient and Curve Number. Overlay of landcover map, slope map, and soil map produce runoff coefficient map while the CN value was obtained from over lapping land cover maps, soil hydrology group, application of soil and water conservation techniques, hydrological conditions, and antecedent soil moisture content in each sub watershed. Garang watershed consists of 4 sub watersheds namely Garang upland, Kreyo, Kripik, and Garang lowland with area of 85.33; 65.36; 38.83; and 23.20 km2. The results showed that specific flood peak on 6 February 2021 were 3.9; 3.2; 3.6; and 3.4 m3/second/km2 for the Garang upland, Kreyo, Kripik, and Garang low land subwatershed. Specific flood volume on Feb 6, 2021 were 91,471; 91,396; 96,605; and 99,058 m3/km2. Garang up land sub watershed has highest specific peak flow and Lower Garang sub watershed has highest specific flood volume. The cause of flooding in the Garang watershed was caused by high rainfall intensity and watershed degradation. Flood peak and flood volume can be reduced by applying some water conservation techniques and increasing vegetation cover.
Impact of agrochemicals application on lead and cadmium concentrations in shallot fields and their remediation with biochar, compost, and botanical pesticides
Authors: Dewi T , Martono E , Hanudin E , Harini R
Published: December 2022

Excessive use of agrochemicals in shallot soil can contaminate the environment and reduce the quality of agricultural products because it is suspected that fertilizers and some pesticides contain heavy metals. The study purpose: 1) determine Pb and Cd content in fertilizers and pesticides used by shallot farmers in Wanasari, Brebes Regency, 2) decide the agrochemicals effect on Pb and Cd concentrations in soil and shallot, then provide environmentally friendly technology with biochar, compost, and botanical pesticides. The study was conducted in Wanasari, Brebes Regency, Central Java from March until October 2020. These studies include a sampling of fertilizers and pesticides that are widely used by shallot farmers in Wanasari Brebes and plot research in the field. The technological approaches used in this study are using biochar, compost, and botanical pesticides. Shallot seed used was the Bima Brebes variety. Analyzes of total Pb and Cd content in the soils and plants were determined using the HNO3:HClO4 extract and measured with an atomic absorption spectrometer (AAS). In this study, analysis was carried out on 11 pesticides with Pb and Cd content of 2.70-22.31 mg/kg and 0.04-0.50 mg/kg, respectively. The Pb and Cd contents in six fertilizers were 10.53-28.09 mg/kg and 0/07-0.52 mg/kg, respectively. Total Pb and Cd in soil are still below the critical limit of heavy metal required for agricultural soil. Heavy metal concentrations of Pb and Cd accumulated in the root > leaf > bulb for all treatments. The use of botanical pesticides, biochar, and compost needs to be developed at the shallot farmer level in several growing seasons so that it is expected to increase crop yields, reduce the cost of chemical pesticides, and be environmentally friendly.
Assessment of rainwater absorption zone in Citarum Watershed using GIS and AHP
Authors: Suryanta J , Nahib I , Turmudi  , Darmawan M , Amhar F , Santikayasa I P , Wahyudin Y
Published: December 2022

Watershed performance can be seen from various aspects, including the ability of the land to absorb water, the amount of erosion, water quality, and water regime index. This study is an effort to manage critical watersheds in managing water absorption based on biophysical parameters such as soil type, slope, geology, rainfall, and land cover. This research was conducted in 2021 in the Citarum watershed, limited to shallow aquifers. It is important to be mapped because it is part of 15 critical watersheds in Indonesia. The method used is to integrate RS, GIS, and Analytical Hierarchy Process (AHP). The results showed that there was a distribution of water absorption in the Citarum watershed, including very low 1.04%, low 21.33%, Medium 25.20%, high 38.80%, and very high 13.63%, with a total area of 638,511.57 ha. The dominant absorption rate is relatively high, 38.8%, and very high, 13.63%, influencing water availability in the Citarum watershed. From this study, AHP shows that the most influential in water infiltration into shallow aquifers is soil, with a score of 0.5, followed by Rainfall Criteria with a score of 0.26, followed by the land cover at 0.13, then slope and geology.
The influence of increasing sea surface temperature on particulate organic carbon in Indonesian waters based on MODIS Aqua satellite
Authors: Yati E , Kushardono D , Gaol J L , Prayogo T , Sulma S , Marpaung S , Nandika M R , Sadiyah L , Satria F , Shidiqy H A , Azizah Y
Published: December 2022

Both Sea Surface Temperature (SST) and Particulate Organic Carbon (POC) have important roles in the marine ecosystem and carbon cycle. Therefore, we analyze the influence of SST on POC in Indonesian water. We used SST and POC products from the moderate-resolution imaging spectroradiometer (MODIS) Aqua satellite from 2003 to 2021 (nineteen years). Regression and a temporal anomaly correlation approach were applied to assess the effect of SST on POC in Indonesian waters. Our results show that the southeast Indonesian waters, south of Java Island and around the Riau Islands, mostly have a high SST variation. On the other hand, the high variation of POC mostly appeared in Indonesian coastal. During the last nineteen years, the increasing SST anomalies (SSTA) in Indonesian waters have been followed by decreasing POC anomalies (POCA). These results indicate that rising SST reduces the ocean’s ability to absorb carbon in Indonesian waters. A strong negative relation between SSTA on POCA was found from April to August and October to January in a seasonal timescale. In the interannual timescale, our result reveals that the strong negative relationship between SSTA and POCA is likely linked to the El Niño Southern Oscillation, the Indian Ocean Dipole, and global warming.
Spatial dynamic model of land use land cover change on hydrological response characteristics in the Upper Ciliwung Sub-Watershed
Authors: Hasibuan M A S , Zulkifli S , Sari R N , Safriana L , Rahadian A
Published: December 2022

Ciliwung Watershed is one whose state is critical. This condition causes the expansion of residential areas upstream of Ciliwung. Land use and land cover change affect a region’s hydrological characteristics. As a hydrological model, the SWAT (Soil and Water Assessment Tools) can predict the hydrological watershed characteristics affected by land use. This study aims to assess the land use change influence on hydrological characteristics and variations in inflow and outflow to develop the ideal recommendations for land use in the Ciliwung sub-watershed using system dynamics. The main river channel is constructed based on the watershed delineation process results, the watershed boundary consisting of 27 sub-watersheds. Due to average monthly discharge, the impact of land use change on hydrological characteristics in 2011, 2016, and 2020 were 65.01, 63.59, and 64.31 m3/second, respectively. The hydrological characteristics of all HRUs generated revealed that the Q max was 13,09 m3/s, and the Q min was 0.18 m3/s. In upstream Ciliwung, based on an inflows and outflows analysis, there were variations in 2011-2016 and 2016-2020. Based on the calibrated simulation results, the coefficient of determination (R2) was 0.8, and NSE was 0.78. The resulting R2 and NSE values indicate excellent model performance in the validation results. The ideal scenario is the intervention scenario on land use and population demography since it can reduce runoff. Runoff is the water that flows over the surface because the soil has reached its maximum infiltration capacity.
Lava flow mapping Karangetang Volcano during 2019 eruption using Sentinel-2 Images and Random Forest model
Authors: Santoso I , Ismanto R Dwi , Chusnayah F , Tjahjaningsih A , Suwarsono  , Vetrita Y
Published: December 2022

Karangetang is one of Indonesia’s most active volcanoes, located in northern Sulawesi. At least 200 people were evacuated due to the threat of lava during the nearly year-long eruption of 2019. In this study, we aim to map the lava flow using Sentinel-2 images. We used a random forest algorithm to separate lava and non-lava classes. Approximately 402 training points were visually interpreted from a pair of pre- and post-event images in 2019 classified as cloud, cloud shadow, bare land, settlement, vegetation, recent lava, and historical lava. To begin, we employed all bands and spectral indices previously identified as useful for separating lava from other materials. A region growing algorithm was used along with additional input data (temperature anomalies product, Normalized Hotspot Indices, and digital terrain model) to differentiate recent and old lava. Only the significant variables from the first run were kept that had a cumulative contribution to the model of greater than 10%. The top 6 important features are Digital Terrain Model, bands 11 and 12 (SWIR) of post-image and pre-image, and band 8A (NIR) of post-image. In the cross-validation of the Random Forest classification, our preliminary results indicate an accuracy of 97% for the test data (N-tree=100). The region’s growing algorithm helped distinguish between recent and historical lava. In the future, we intend to validate the map using an independent dataset and test the model at various locations
Application of Landsat-8 OLI/TIRS to assess the Urban Heat Island (UHI)
Authors: Karyati N E , Sholihah R I , Panuju D R , Trisasongko B H , Nadalia D , Iman L O S
Published: December 2022

Urban Heat Island (UHI) phenomenon is a particular climate change impact in urban areas that can trigger adverse effects on environmental conditions. This effect is usually worsened by increasing anthropogenic activities. While the impact of UHI has mostly been studied in metropolitans around the world, few studies are presented investigating the outcome in mid-sized cities. This study aims to assess spatial distribution of Urban Heat Island (UHI) in Bogor city, Indonesia, by utilizing thermal data (Band-10) from Landsat-8 OLI/TIRS. The Landsat imagery was acquired in May 2021, in the beginning of the dry season. The result of study shows Land Surface Temperature (LST) values ranged from 26.23 to 33.76°C, with an average temperature of 31.29°C, while the range of NDVI was between 0.08 to 0.55. Further, the correlation between Land Surface Temperature (LST) and Normalized Difference Vegetation Index (NDVI) was calculated to investigate the relationship between vegetation density and surface temperature condition for examining the outlook and possibilities to minimize the impact of UHI through improving vegetal conditions. A negative correlation suggests that expanding vegetation coverage can reduce urban heat island impacts by 35%, and other factors influence the rest. The land surface temperature threshold to determine UHI is 32.01°C, so the UHI area was identified at ca. 13.12 km2 around the city centre.
Mangrove rehabilitation planning with ecological and geospatial approaches in Cemara Village, Indramayu, West Java
Authors: Safira D A , Rusdiana O , Kusmana C
Published: December 2022

Several rehabilitation activities have been carried out by the government in Indramayu Regency, but have not been able to restore the condition of the mangrove. Hence, it is necessary to rehabilitate potential land. The aim of this study is to formulate the direction of rehabilitation planning in Cemara Village, Indramayu based on an ecological approach and mangrove ecosystem. The method used in this study is geospatial approach that is integrated with field quantitative data. The result shows that the total area that is potential to be rehabilitated in Cemara Village is 1,012.020 ha, which consists of 285.390 ha (28.2%) vegetated area and 726.630 ha (71.8%) non-vegetated area. Furthermore, the plan of rehabilitation in Cemara village is based on the consideration of mangrove typology, mangrove stand density, physical parameters, and land use. Recommendation for rehabilitating mangrove forest on land with low mangrove density and emergent land by performing intensive planting, on pond land by performing sylvofishery planting, on land with moderate mangrove density by enrichment planting, and on land with high mangrove density by carrying out maintenance for protective function.
Indonesian savanna fire-related spectral analysis
Authors: Vetrita Y , Santoso I , Kartika T , Prasasti I
Published: December 2022

Peat fires in Indonesia frequently result in ecological degradation and loss. Public attention has shifted to savanna fires, which are usually overlooked but have increased in frequency in recent years, surpassing the area of controlled peat fires in Indonesia. Mapping the short-lived burns in Indonesia’s savanna is challenging. Only a few studies have examined fires in the Indonesian savanna, specifically the spectral responses associated with fires. Our study aims to analyse spectral changes caused by fires in Sumba Island, East Nusa Tenggara, Indonesia using field data and satellite images (Sentinel-2 and Landsat 8). We plotted the spectral values from blue to middle infrared bands for each burned and unburned site. In addition, we investigated the time series associated spectral indices for each site to determine how long spectral changes can be noticed immediately following fire incidents. Our research discovered that vegetation regrowth occurred rapidly (within two months), obscuring the detection of burned areas in the savanna. The red, near infrared, and middle infrared bands (>1,300 nm) were found to be the optimal spectral bands for discriminating between savanna vegetation regrowth and newly burned areas. Our findings will assist the Indonesian government in improving the mapping of burned areas for the purposes of national fire management.
The capability of Sentinel-1 polarization combinations for oil spill detection (study case: Karawang, Indonesia)
Authors: Afgatiani P M , Suhadha A G , Ibrahim A
Published: December 2022

Marine pollution is one of issues that is widely discussed such as marine debris, chemical contamination, and oil spill. It has many impacts on the environment. Remote sensing helps detect the presence of an oil spill via satellite platform. One commonly used satellite is Synthetic-Aperture Radar (SAR) imagery, which can see oil spills even in cloudy conditions. However, the black and white appearance of the radar sometimes makes it difficult to distinguish between an oil spill and look alike. Therefore, this study aims to determine the polarization combination in the Sentinel-1 SAR imagery. Sentinel-1 Single Look Complex (SLC) is used as input and processes through various stages to obtain Coherence Vertical-Vertical (VV) and Vertical-Horizontal (VH) results. There are four steps for processing the data; convert the data to backscattering coefficient from SLC data, stacking, Terrain Observation by Progressive Scan (TOPS) coherence, and building the robust combinations. The polarization in the Sentinel-1 was calculated to determine artificial bands for the correct combination, namely Divide (VV/VH) as band 1, Average ((VV+VH)/2) as band 2, Multiple (VVxVH) as band 3, Add (VV+VH) as band 4, and Subtract (VV-VH) as band 5. Furthermore, the determination of the band used in the polarization composite display is based on the intensity value. As a result, the recommendation for Sentinel-1 polarization is obtained, which involves bands 2, 3, and 5.
Water quality and biophysical condition for tourist activities in Situ Rawa Kalong Depok City, West Java, Indonesia
Authors: Widyawati K , Kusmana C , Pertiwi S , Sulistyantara B
Published: December 2022

Having a role as the water resource, situ water quality and biophysical conditions are the main components that reach the basis of sustainability analysis. This study aims to analyze the water quality and biophysical conditions of the Situ Rawa Kalong area as the basis for achieving sustainable management. The description of existing and potential conditions uses descriptive qualitative methods and scoring to measure the factors of water quality, lake quality, and tourism suitability. The literature study used secondary data from The Sanitation and Environmental Office of Depok City in the form of the Situ Rawa Kalong water quality data 2016-2020 and other sources. A field survey was conducted by measuring, mapping with GIS, and documenting. It concerns such data on vegetation, fauna, hydrology, morphology, climate, carrying capacity, topography, facilities, and infrastructure. The result is that Situ Rawa Kalong has limitations in determining the type of recreation. It is a non-contact and a view recreation. The types of tourism are meant for boating, fishing, and scenery recreation. The general biophysical condition of Situ Rawa Kalong is disturbed. As a potential water resource and tourism in Depok, Situ Rawa Kalong must be managed sustainability.
Bibliometric and meta-analysis studies of the correlation between macrozoobenthos abundance and mangrove density
Authors: Nihan A R K , Kusmana C , Krisanti M , Tiryana T , Ulumuddin Y I
Published: December 2022

Several attempts have been made to detect the condition of the mangrove ecosystem. Although the method used to detect the state of the mangrove ecosystem faces numerous challenges, it has yet to describe the functional structure of the mangrove ecosystem about its environment. Therefore, this study provides an overview of research trends regarding the relationship between macrozoobenthos abundance and mangrove forest density. This study aims to conduct bibliometrics and meta-analysis related to the abundance of macrozoobenthos and mangrove density. First, a bibliometric analysis to see research gaps using VOSviewer, the source of bibliometric data comes from GScholar and Scopus with the keywords mangrove search and meta-analysis. The number of articles filtered and processed using VOSviewer is 497 articles. After looking for gaps, the researchers conducted a meta-analysis to see the relationship between the abundance of macrozoobenthos and the density of mangroves. This study shows that no meta-analysis discusses the relationship between macrozoobenthos abundance and mangrove density. The results of the meta-analysis process found a strong relationship between mangrove density and macrozoobenthos mass with a significance value of < 0.001 and I^2 = 97.37.
Health assessment of The Upper Citarum Watershed, West Java, Indonesia
Authors: Sapan E G A , Riandasenya S A R , Yulianingsani  , Anisah  , Ilmi M K , Habibie M I
Published: December 2022

Citarum watershed is one of the national priority watersheds. Watershed health assessment activities are used as a reference in efforts to restore watershed conditions and improve watershed management planning. The watershed health was assessed for the Upper Citarum watershed in West Java, Indonesia. Three indicators, including hydrology and land cover were used to assess the watershed health. Hydrology indicators include the Annual Flow Coefficient (KAT) and River Regime Coefficient (KRA). Watershed health level assessment was conducted using Analytical Hierarchy Process (AHP) scoring method. Watershed health levels such as very unhealthy, unhealthy, moderately unhealthy, healthy, and very healthy were obtained by calculating each indicator total number of scores. From the health assessment result of The Upper Citarum watershed, the Annual Flow Coefficient indicator shows an unhealthy level, and River Regime Coefficient indicator shows very unhealthy level. In addition, the land cover indicator shows unhealthy level. Thus, because of a decreased vegetation cover over ten years. Based on the AHP weighting, it was found that The Upper Citarum watershed is at a very unhealthy level. Therefore, according to government regulations about proper watershed management, land cover vegetation must be managed to increase conservation and water quantity to maintain the Citarum watershed’s sustainability.
Flood Inundation Distribution Modelling for River Boundary Management in Cisadane Sub-Watershed
Authors: Hasibuan M A S , Widiatmaka  , Tarigan S D , Ambarwulan W
Published: December 2022

Cisadane watershed is one of the priority watersheds to be restored immediately. The Cisadane River has the potency to cause floods in the river’s border region due to a reduction in river width, river depth, and land-use changes. This study aims to analyze the distribution of flood inundation by employing the HEC-RAS. Flood distribution modeling using components the flood distribution in the steady flow of water level profile component. The permanent flow use is 19 January 2022 discharge. Scenarios discharge was reported with a return period of 5, 10, 25, 50 and 100 years. Digital Elevation Model (DEM), discharge, watershed boundary, and land use maps are included in the data used. The results indicated that 30 districts were affected by the flood. The extent of the annual flood inundation is predicted to expand by 24.41 hectares per year throughout each discharge period. Teluk Naga, Sepatan Timur, Paku Haji, and Neglasari Districts have the broadest and deepest probablility inundation in Tangerang Regency, with a total inundation area 644,7 hectares (permanent flow). The depth will increase from 0.40 to 1.33 m as the return period discharge rises. Tangerang Regency, located in the Lower Cisadane watershed, is the most affected area.
Growth performance of planted mangrove seedlings on an intertidal area of the Bali Sea
Authors: Kusmana C , Mulyana D , Gunarso P , Tambayong K , Juniartini S , Dwiyanti F G
Published: December 2022

Mangrove ecosystems have various services, one of them being a barrier to strong waves and seawater currents. Growing mangroves in the physical environment with sandy soil, high differences between high and low tides, big waves, and strong seawater currents such as in the Bali Sea under a highway interchange is not easy. To cope with this kind of less-understood environmental condition, the experiment planting was done by applying three kinds of planting techniques: mangrove incubator (guludan), strip line planting, and cluster planting using the mangrove (Rhizophora mucronata) seedlings having sufficient tolerance to high salinity and sandy soils. Two months after planting, the tree planting techniques showed a high percentage of survival of planted seedlings (PSS=100%) and well healthy growing performance of seedlings (no infected by pest and disease), the average increments of seedling stem diameter ranged from 0.73 to 1.15 mm, height ranged from 8.70 to 10.98 cm, and the number of leaves ranged from 1.08 to 1.45 pieces in a month. Furthermore, the best planting technique was the mangrove incubator (guludan) in terms of stem diameter growth, while the strip line and cluster techniques were the best in terms of seedling height growth.
Successful semen collection and cryopreservation of Banteng semen (Bos javanicus) using an artificial vagina
Authors: Setiadi D R , Mulia B H , Widianti A , Manansang J , Hastuti Y T , Yoelinda V T , Agil M , Arifiantini R I , Nugraha T P
Published: December 2022

Gamete collection is feasible in Banteng (Bos javanicus) and is essential for conserving this species. The common practice of semen collection in wild animals is using the electroejaculation technique which is considered invasive with lower-quality results. This study aims to develop sperm collection further using an artificial vagina and to investigate the sperm motility of Banteng after being frozen-thawed. A Banteng bull kept in Taman Safari Indonesia was used for this study. Before semen collection, the bull is acclimatized to collection conditions. Semen collection is done once a month for six months. The semen was evaluated according to a method for bovine semen. Cryopreservation of semen was performed using an Andromed® extender, in 0.25 mL Ministraw®, and equilibrated at 4°C for 3 hours, followed by freezing in liquid nitrogen vapor. Quality testing was performed using the CASA IVOS II™. The result showed variations between batches, with the number of mountings 9.83±2.86(7-15) times, semen volume 8.42±1.42 (6-9) mL, straw produced 152±15.23 (130-172) straws, and total motility after thawing 44.28 ±12.14, (26.83-55.96). The quality of frozen semen of the later batch showed better results p<0.05. In conclusion, the collection of Banteng semen using an artificial vagina showed promising results with moderate quality.
Sustainability level of Silvofishery ponds on the coast of Semarang City
Authors: Muthoh R F , Santoso N , Mulatsih S
Published: December 2022

Silvofishery ponds are aquaculture areas while maintaining their ecological functions as conservation of mangrove ecosystems. Coastal community of Semarang City is one of those that cultivate it, and the main commodity is milkfish (Chanos chanos). This research was carried out on five dimensions; ecology dimension, economic dimension, social dimension, technological dimension, and ethics dimension using the RAPFISH (Rapid Appraisal for Fisheries) analysis method. Types of ponds developed in the design of komplangan. The level of sustainability of the silvofishery ponds management is 43.02%, with less sustainable categories in different indexes and dimensions, namely: The ecological dimension 32.02% (less sustainable), economic dimension 45.63% (less sustainable), social dimension 50.61% (entirely sustainable), technological dimension 49.77% (less sustainable), and ethics dimension 36.06% (less sustainable). The results of the leverage analysis on each dimension indicate the need to improve the management of sensitive attributes in each dimension. Sensitive indicators in Silvofishery ponds management are ecological dimension (mangrove density), dimension (market orientation), social dimension (access to use by the community), technological dimension (air circulation), ethics dimension (non-formal institutions). All measurements have a Monte Carlo value that difference is <1; therefore, the results of the Silvofishery ponds management are following the real conditions in the field.
Carbon sequestration potential of rubber plantation in East Kalimantan
Authors: Lestari N S , Noor’an R F
Published: December 2022

Forestry and Other Land Use (FOLU) sector has significant contributions to greenhouse gas emissions in Indonesia. Besides reducing deforestation and forest degradation, plantation development also plays an important role in climate change mitigation, particularly for carbon stock enhancement. This study aims to estimate the carbon sequestration potential of rubber plantations in East Kalimantan. Rubber plantation carbon stock was measured by establishing 24 sample plots with the size of 20x20 m in two locations, Kutai Timur and Penajam Paser Utara regencies. Above-ground biomass of rubber was estimated using the allometric equation AGB = 0.144 x D2.40. While the carbon stock was further calculated using the lifetime average approach. The result shows that the carbon stock of rubber plantations in East Kalimantan is 75.71 tons C ha-1. With a total plantation area of 123,460 ha, the potential carbon sequestration of rubber plantations in East Kalimantan is about 9.05 Mt, equivalent to 33.19 Mt CO2e. Given the high carbon sequestration potential, rubber plantation development needs to be considered as an important strategy to achieve FOLU net sink by 2030. This is part of the enhancement of carbon stock through land rehabilitation, which is prioritized to be implemented in degraded lands to avoid deforestation and forest degradation in forested areas.