Preprints
There are 7999 Preprints listed.
Water recharge, hydrological processes, and surface water quality through Nature-Based Solutions (NBS) in streams of the Ilaló volcano.
Published: 2025-09-28
Subjects: Civil and Environmental Engineering
In the Ilaló volcano, water supplied the Valle de los Chillos and Tumbaco to the south of the capital of Ecuador. Mamatena and Kanguil Uku are two water sources, and for approximately 40 years, there has been a pipeline for domestic and irrigation use. The main objectives were to identify the water recharge areas, characterize the groundwater flow lines, and determine the percentage of losses due [...]
A pipeline for representing buildings as fuels in wildland urban fire spread and risk modeling
Published: 2026-07-09
Subjects: Categorical Data Analysis, Databases and Information Systems, Engineering, Geographic Information Sciences, Mechanical Engineering, Nature and Society Relations, Other Engineering, Other Environmental Sciences, Other Mechanical Engineering, Other Physical Sciences and Mathematics, Physical and Environmental Geography, Risk Analysis, Software Engineering, Spatial Science
Wildfires pose an increasing risk to structures and communities located adjacent to or among vegetative landscapes. Yet most open landscape-scale fire modeling workflows still lack a reproducible way to represent buildings as combustible fuels rather than only as exposed assets or nonburnable developed land. This paper presents FireDX, a geospatial data engine that generates standardized, [...]
Estimating Stability Constants and Entropy for Reactions Between Aqueous Metal Ions and Monovalent Oxygen-Bearing Ligands: Applications to Hydrothermal Metal–Organic Acid Systems
Published: 2025-10-02
Subjects: Life Sciences, Medicine and Health Sciences, Physical Sciences and Mathematics
Linear free energy relations were obtained from existing experimental data and used to estimate stability constants for over 16,000 metal complexes with monovalent oxygen-bearing ligands comprising 75 metal species and 220 ligands. Similar relationships for metal-ligand entropy of association were also obtained which facilitate computation of stability constants from 0 to 125°C for over 6000 [...]
A Comparative Evaluation of Advanced Urban Data Methods in WRF
Published: 2025-10-18
Subjects: Atmospheric Sciences, Fluid Dynamics, Meteorology, Oceanography and Atmospheric Sciences and Meteorology
Urban parameterization is critical for accurately simulating near-surface temperature and the Urban Heat Island (UHI) effect in WRF. In this study, we compare three distinct approaches—W2W (a Python package integrating WUDAPT LCZ data), WRFUP (a Python package leveraging global high-resolution datasets), and a LiDAR-based parameterization—during the August, 2023 heatwave in Grenoble, France. Our [...]
Homogenization of Elastic Wave Equation using Renormalization Group Theory
Published: 2025-11-03
Subjects: Physical Sciences and Mathematics
Seismic waves traveling through the Earth interact with heterogeneities of all scales along their path. Generally, we are interested in travel time associated with coarse-scale structures; however, fine-scale structures also influence the amplitude and travel time for all phases. The distribution of fine-scale heterogeneities not only affects travel times but also impacts how we observe [...]
Integrating Environmental Variables and Machine Learning for Wildfire Susceptibility Prediction in Portugal
Published: 2025-09-29
Subjects: Life Sciences, Physical Sciences and Mathematics
Wildfires constitute a significant ecological disturbance within Mediterranean ecosystems, exerting profound effects on forest dynamics, biodiversity, and land management practices. The development of precise susceptibility mapping is essential to inform prevention strategies, optimize resource allocation, and promote sustainable forest management by increasing fire pressure. This study employed [...]
Biomineralisation for Sustainable Ecotoxic Metal Immobilisation via Enzyme Induced Carbonate Precipitation
Published: 2025-10-02
Subjects: Engineering, Physical Sciences and Mathematics
Heavy metal contamination of water presents a critical global challenge driven by the persistence and toxicity of elements such as arsenic, cadmium and lead. Conventional remediation strategies, such as Enzyme-Induced Carbonate Precipitation (EICP), typically rely on commercial urease and a multi-step extraction process, which increases energy demand, generates ammonium byproducts, and requires [...]
Mechanisms of Lithospheric Dripping in Earth’s Convecting Mantle: Implications for Tectonic Switching
Published: 2025-10-01
Subjects: Earth Sciences, Tectonics and Structure
Gravity-driven dripping is a key recycling process of lithospheric materials into the underlying mantle reservoir. Here, we use 2D computational fluid dynamic (CFD) thermo-chemical simulations to unveil how such dripping process occurs by modulating the thermal convection in Earth’s mantle. Our simulations incorporate the following variables: lithospheric buoyancy contrasts (B), metamorphic [...]
A Structured Inference Framework for Spatial Hydrological Monitoring Networks
Published: 2026-10-09
Subjects: Civil Engineering, Environmental Engineering, Hydraulic Engineering
Regional hydrologic and environmental inference relies on spatial monitoring networks exhibiting dependence, heterogeneity, and evolving behavior. Many regional analyses apply statistical methods in isolation, with limited structure governing when pooling, spatial modeling, or non‑stationary inference is admissible. This study presents HyMES Regional, a structured inference framework that [...]
From Complex SDG Systems to Network Models: an Ontology-Based Eight-Step Framework
Published: 2025-10-01
Subjects: Earth Sciences, Environmental Studies, Sustainability
With only 18% of Sustainable Development Goals (SDGs) on track for 2030, systems-based approaches to understanding their interdependencies are essential. Network science can reveal leverage points and guide prioritisation, yet it is often applied without sufficient domain integration, obscuring rather than clarifying sustainability dynamics. We present an eight-step framework for evaluating [...]
Trees and Life, Heat and Death: Integrating Temperature and Green Spaces with Social Determinants of Health in Hamilton, Ontario, Canada.
Published: 2025-10-01
Subjects: Medicine and Health Sciences, Physical Sciences and Mathematics
Objectives Climate change has wide-reaching implications for planetary and human health; one of its rising impacts is deaths related to extreme heat. This study attempts to integrate remotely sensed measures of temperature and greenness into the methodology of Code Red, a study examining the relationship between health and a variety of social determinants in Hamilton, Ontario, Canada, initially [...]
ClimActor 2.0: A spatialized database of subnational climate pledges and emissions data
Published: 2025-09-30
Subjects: Environmental Studies
ClimActor 2.0 is an open, spatialized database that compiles climate targets, action plans, and self-reported emission inventories from subnational governments, including cities, municipalities, states and regions, worldwide. The dataset provides standardized administrative boundaries for each entity, enabling direct linkage to geospatial data such as population, GDP, land cover, and other [...]
Mitigation of Ultraviolet Solar Radiation Involving Calcite (MUSIC)
Published: 2025-10-15
Subjects: Climate, Environmental Engineering, Environmental Health and Protection
This investigation explores the use of calcite (CaCO3) powder, the most common and radiation- resistant form of calcium carbonate, as an environmentally friendly mechanism for solar radiation management by measuring its ability to deflect ultraviolet radiation from the sun. The experiment took place on a high-altitude balloon (HAB) payload. Three sets of laminated calcite sheets with varying [...]
Eocene lacustrine–volcaniclastic deposits at Aliabad (Central Iran): A possible Proto-basin of the Oligo-Miocene Qom Formation
Published: 2025-10-14
Subjects: Earth Sciences, Geology, Paleobiology, Paleontology, Physical Sciences and Mathematics, Sedimentology, Stratigraphy, Volcanology
Central Iran hosts intricate Cenozoic successions where the Oligo‑Miocene Qom Formation forms a major hydrocarbon reservoir. The stratigraphic and paleoenvironmental relationship of the Eocene Aliabad deposits to this formation has been controversial. This study integrates stratigraphic logging, petrography, geochemistry (XRD/XRF), and ichnology on 46 thin sections from Aliabad and 157 [...]
Coupling local perspectives with remotely sensed data to better understand small-scale tropical forest changes
Published: 2025-09-30
Subjects: Environmental Studies
Forests are essential for climate, biodiversity and society. Conserving or increasing forest cover is the focus of many national and international policies. Yet implementing such policies at local levels remains a massive challenge, in part due to contrasting perceptions of small-scale forest cover changes and their effects on livelihoods. In this study, we couple remotely sensed forest cover [...]