Preprints
Search for indonesia (60 results)
Field survey of seawater reverse osmosis (SWRO) usage for overcoming water scarcity on small islands in Indonesia
Published: 2024-04-11
Subjects: Civil and Environmental Engineering
The dry season impacts clean water availability in Indonesia, particularly on small islands; however, there are few comprehensive studies of water availability on small islands. The aim of this study was to assess clean water sources and the obstacles to accessing clean water on small islands. We used a combination of structured questionnaires and interviews along with direct observations on two [...]
Explaining land subsidence variation along the north coast of Java for Semarang and Pekalongan, Indonesia
Published: 2024-03-31
Subjects: Physical Sciences and Mathematics
This study investigates the significant land subsidence in the cities of Semarang and Pekalongan on the north coast of Java. High land subsidence rates of several cm up to dm per year have being reported, directly contributing to relative sea-level rise. This research uses PS-InSAR data to analyze the spatial and temporal variations in subsidence and identify its causes, which are expected to be [...]
Role of Indonesian Archipelago on Global Thermohaline Circulation: Insights from Numerical Experiments
Published: 2023-12-19
Subjects: Numerical Analysis and Scientific Computing, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics
This study employs the cGENIE Earth System Model to investigate the effects of the Indonesian Throughflow (ITF) and Indonesian Archipelago (IA) closure on global meridional thermohaline circulation (THC). Over a simulated period of 10,000 years, the analysis centers on critical variables, including surface density, vertical density profiles, global overturning circulation, and ocean ventilation [...]
Coral geochemical response to uplift in the aftermath of the 2005 Nias-Simeulue earthquake
Published: 2023-10-07
Subjects: Environmental Indicators and Impact Assessment, Geochemistry, Geomorphology, Natural Resources and Conservation, Tectonics and Structure
On 28 March 2005, the Indonesian islands of Nias and Simeulue experienced a powerful Mw 8.6 earthquake and widespread co-seismic uplift and subsidence. In areas of coastal uplift (up to ~2.8 m), fringing reef coral communities were killed by exposure, while deeper corals that survived were subjected to habitats with altered runoff, sediment and nutrient regimes. Here we present time-series [...]
Monogenetic volcanoes as windows into transcrustal mush: A case study of Slamet and Loyang volcanoes, Central Java
Published: 2023-08-26
Subjects: Volcanology
Monogenetic volcanic "fields (MVFs) are commonly associated with long-lived polygenetic composite volcanoes in many tectonic settings. The association between polygenetic and monogenetic volcanoes has raised questions as to the source of monogenetic melts – specifically, whether they are derived from the transcrustal mush underlying a nearby polygenetic volcano, or from a different batch of [...]
imc-precip-iso: Open monthly stable isotope data of precipitation over the Indonesian Maritime Continent
Published: 2023-08-12
Subjects: Climate, Earth Sciences, Environmental Sciences, Fresh Water Studies, Hydrology, Physical Sciences and Mathematics, Water Resource Management
Stable isotopes, $\delta^2$H, $\delta^{18}$O, and d-excess, are valuable tools as natural tracers of diffusion processes and phase changes in the global hydroclimatological cycle. The Indonesian Maritime Continent (IMC) is an archipelago area surrounded by very warm waters which induce convective activities as the primary heat source driving global atmospheric circulation. Given the central role [...]
Performance evaluation of a simple feed-forward deep neural network model applied to annual rainfall anomaly index (RAI) over Indramayu, Indonesia
Published: 2023-06-30
Subjects: Climate, Hydrology, Physical Sciences and Mathematics, Statistical Models, Statistics and Probability, Sustainability, Water Resource Management
Indramayu is a district in West Java that is known for being the leading producer of rice and brackish salt. The production of these two commodities is strongly influenced by hydroclimatological conditions, making accurate and reliable long-term estimates crucial. In this study, we evaluated a simple feed-forward deep neural network (DNN) model that could potentially be used as a candidate for [...]
Global Inventory of Dissolved CO2 Sequestration Potential in Geothermal Systems
Published: 2023-06-20
Subjects: Engineering, Other Engineering
Geothermal electricity generation has low carbon emissions compared to hydrocarbon alternatives. Nevertheless, recent attention on emissions of magmatic CO2 and other non-condensable gases (NCG) has prompted interest in their capture and reinjection. The geothermal industry is uniquely placed to effect CO2 sequestration due to existing reinjection infrastructure (e.g., wells, pipes, pumps) and [...]
Unravelling the morphogenesis of coastal terraces at Cape Laundi (Sumba Island, Indonesia): insights from numerical models
Published: 2023-05-18
Subjects: Earth Sciences
The morphology of coastal sequences provides fundamental observations to unravel past sea level (SL) variations. For that purpose, converting morphometric observations into a SL datum requires understanding their morphogenesis. The long-lasting sequence of coral reef terraces (CRTs) at Cape Laundi (Sumba Island, Indonesia) could serve as a benchmark. Yet, it epitomizes a pitfall that challenges [...]
Geodynamic control on Pleistocene coral reef development: insights from northwest Sumba Island (Indonesia)
Published: 2023-03-18
Subjects: Earth Sciences
The fossil record of Quaternary reef systems, as expressed in uplifted regions by sequences of stacked terraces, has been extensively used either to understand their morphodynamics or to unravel sea level variations. Yet, because these two aspects are intimately linked, Quaternary reef analysis is often underdetermined because the analysis often focuses on single sequences, along one-dimensional [...]
Did hydroclimate conditions contribute to the political dynamics of Majapahit? A preliminary analysis
Published: 2023-02-21
Subjects: Atmospheric Sciences, Climate, Earth Sciences, Environmental Studies, Geography, Human Geography, Nature and Society Relations, Physical and Environmental Geography, Physical Sciences and Mathematics, Social and Behavioral Sciences
Majapahit was the largest Hindu-Buddhist empire that ruled the Indonesian archipelago from the late 13th to mid-16th centuries CE. Only now there is still a lot of history surrounding the Majapahit era that has yet to be revealed. One is about how environmental factors influenced the political dynamics at that time. This study tries to discuss the influence of hydroclimate regimes using the Paleo [...]
Dynamic rainfall thresholds for landslide early warning in Progo Catchment, Java, Indonesia
Published: 2023-01-20
Subjects: Applied Statistics, Earth Sciences, Geomorphology, Hydrology, Meteorology
This study aims to derive and evaluate new empirical rainfall thresholds as the basis for landslide early warning in Progo Catchment, Indonesia, using high-resolution rainfall datasets. Although attempts have been made to determine such thresholds for regions in Indonesia, they used coarse-resolution data and fixed rainfall duration that might not reflect the characteristics of rainfall events [...]
Extensional Deformation of a Shale-dominated Delta: Tarakan Basin, Offshore Indonesia
Published: 2022-08-04
Subjects: Geology, Sedimentology, Tectonics and Structure
Deformation on shale-rich continental margins is commonly associated with thin-skinned extension above mobile shales. Normal faulting and shale mobilization are widespread on such margins, being associated with and controlled by progradation and gravitational failure of deltaic sedimentary wedges. However, due to limitations in our ability to seismically imaging these mobile shales, our [...]
Validation of glacial-interglacial rainfall variations in southwest Sulawesi using Mg/Ca and δ18O in speleothems
Published: 2022-06-17
Subjects: Atmospheric Sciences, Climate, Earth Sciences, Geochemistry, Hydrology, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics, Speleology
The final version of this article is now published with Communications. Earth and Environment. To view this open access article, please use the Published Article DOI. Speleothem δ18O is widely used as a proxy for rainfall amount in the tropics on glacial-interglacial to interannual scales. However, uncertainties in the interpretation of this renowned proxy pose a vexing problem in tropical [...]
Hotspots of Mining-Related Biodiversity Loss in Global Supply Chains and the Potential for Reduction through Renewable Electricity
Published: 2022-06-15
Subjects: Engineering
Anticipated infrastructure growth and energy transition may exacerbate biodiversity loss through increased demand for mining products. This study uses an enhanced multi-regional input-output database (REX, Resolved EXIOBASE) and supply chain impact mapping (SCIM) method to assess global biodiversity loss associated with mining-related land use. We identify hotspots in the supply chain of mining [...]