Preprints
Filtering by Subject: Environmental Engineering
Satellite-Based Clustering of Pre-Monsoon Wildfires and Variability of Tropospheric NO₂ and CO in Nepal
Published: 2026-06-10
Subjects: Environmental Engineering
Nepal's pre-monsoon season transforms the country's southern lowlands into one of South Asia's most active wildfire landscapes. However, spatially explicit assessments of wildfire dynamics and trace gas variability at high temporal resolution remain limited. This study uses a satellite-based methodology to quantify wildfire activity and its atmospheric impacts across Nepal during 2021–2024. [...]
A satellite-monitoring research agenda for urban stormwater infrastructure: capabilities, gaps, and a community-benchmark proposal
Published: 2026-06-09
Subjects: Environmental Engineering, Hydraulic Engineering, Hydrology
Urban stormwater best management practices (BMPs) are a core component of urban-resilience portfolios worldwide. Per-asset performance monitoring, however, is both limited and difficult to enumerate at the global scale. We argue that publicly available satellite Earth observation has reached the capability point at which the resulting accountability gap can be closed at portfolio scale, and that [...]
Automated GIS-Based Hydrological Modeling Framework for Flood Hydrograph Estimation in Ungauged Mediterranean Catchments: A Case Study of Sicily
Published: 2026-06-06
Subjects: Civil and Environmental Engineering, Engineering, Environmental Engineering, Hydraulic Engineering
The estimation of design flood hydrographs in ungauged Mediterranean catchments remains a persistent challenge for hydrological engineering, flood hazard assessment, and territorial risk planning. The absence of discharge observations, coupled with the high temporal concentration of precipitation and the marked geomorphological variability of small basins, renders conventional calibration-based [...]
Two decades of kilometer-scale daily PM2.5 from satellite observations and machine learning reveal geographically diverging exposure in Ghana
Published: 2026-06-05
Subjects: Artificial Intelligence and Robotics, Atmospheric Sciences, Civil and Environmental Engineering, Earth Sciences, Engineering, Environmental Engineering, Environmental Monitoring, Environmental Public Health, Environmental Sciences, Geographic Information Sciences, Geography, Oceanography and Atmospheric Sciences and Meteorology, Other Earth Sciences, Remote Sensing, Spatial Science
Exposure to fine particulate matter (PM2.5) is a major contributor to global burden of disease, yet air quality data remain sparse in many low- and middle-income countries, limiting nationwide monitoring and effective policy development. We address this gap by developing a high-resolution gridded (1 km × 1 km) dataset for daily surface PM2.5 concentrations in Ghana from 2005 to 2025 by training [...]
Enhancing the Generalization of Flood Susceptibility Models: A Leakage-Aware Ensemble Framework for Deltaic Landscapes
Published: 2026-05-08
Subjects: Civil and Environmental Engineering, Engineering, Environmental Engineering, Hydraulic Engineering
Flood susceptibility mapping (FSM) is a cornerstone of disaster risk reduction in low-lying deltaic regions; however, conventional machine learning (ML) applications frequently suffer from spatial data leakage, resulting in inflated performance metrics and unreliable hazard predictions. To address this critical methodological shortcoming, this study develops a robust, leakage-aware ML framework [...]
Rules-Based Systems Modeling for Hydropower Forecasting in Multi-Objective Reservoir Systems: Application to California's Central Valley Project
Published: 2026-05-02
Subjects: Civil and Environmental Engineering, Engineering, Environmental Engineering
Hydropower from large multi-objective reservoirs and water management projects constitutes the bulk of global reservoir-based generation. Yet accurate forecasting remains challenging because generation is governed not only by hydrology but by complex institutional rules, environmental regulations, and infrastructure constraints. This study demonstrates that a rules-based systems modeling [...]
A Meteorological Indicator for Particulate Matter Emissions: Adapting the Hot-Dry-Windy Index to Predict Feedlot Evening Dust Peaks
Published: 2026-04-21
Subjects: Agriculture, Animal Sciences, Bioresource and Agricultural Engineering, Civil and Environmental Engineering, Engineering, Environmental Engineering, Environmental Sciences, Life Sciences, Physical Sciences and Mathematics
Particulate matter emissions from cattle feedlot operations pose significant challenges to both livestock productivity and air quality in surrounding communities. The evening dust peak (EDP) has been documented for decades, but comprehensive long-term studies examining its meteorological drivers are very limited. While laboratory and field-scale investigations have demonstrated that feedlot [...]
Quantifying hydropower flexibility during extreme temperature events
Published: 2026-04-20
Subjects: Computational Engineering, Environmental Engineering, Hydraulic Engineering, Hydrology, Other Civil and Environmental Engineering, Other Mathematics, Power and Energy, Systems Engineering
Extreme weather events can impose substantial stress on the electrical grid. Hydropower offers unique operational flexibility, enhancing grid resilience and reliability. Despite this value of flexibility, systematic assessments of hydropower flexibility -- particularly during extreme events -- remain limited. This study is the first to quantify hydropower operational flexibility using 25 years' [...]
The Evolution of Digital Twins in Hydrology and Environmental Science: From Physical Models to AI-Assisted Autonomous Systems
Published: 2026-04-10
Subjects: Civil and Environmental Engineering, Environmental Engineering
Digital Twin (DT) technologies have emerged as transformative framework in hydrology, enabling adaptive, real-time modeling of water systems through data-driven intelligence. This position paper proposes a five-level technological evolution model for hydrological digital twins, tracing field’s progression over the last three decades (1995-2025) from physical models to autonomous & [...]
Stress testing insurance market stability under climate risk
Published: 2026-04-01
Subjects: Environmental Engineering, Other Earth Sciences, Other Environmental Sciences, Risk Analysis
Climate change, urban development, and evolving insurance markets threaten the stability of disaster-risk financing. Homeowners insurance is embedded in a layered network of reinsurers, capital markets, and public backstops that can be overwhelmed by extreme events. We develop a probabilistic risk propagation model linking tropical cyclone wind and flood losses to Florida’s residential insurance [...]
Rethinking land take futures: A cellular automata-based spatial planning approach to model urban expansion and densification under divergent growth scenarios
Published: 2026-04-01
Subjects: Environmental Engineering, Environmental Studies, Geographic Information Sciences, Spatial Science
Land take - the conversion of greenfield land into built-up areas - poses critical challenges for sustainable urban development. Addressing this issue requires understanding the balance between outward urban expansion and inward urban densification. This study employs a Multinomial Logistic Regression-based Cellular Automata (MNL-CA) model to simulate two different future scenarios of urban [...]
Machine Learning Based Alum Dosing Optimization for Adaptive Water Quality Management in Treatment Plant
Published: 2026-03-27
Subjects: Civil and Environmental Engineering, Environmental Engineering
Ensuring safe and cost-effective water purification remains a critical challenge, particularly for large natural water bodies like the Halda River, where water quality parameters fluctuate significantly. Traditional methods for determining alum dosages often rely on manual experiments that fail to adapt to real-time variations, leading to inefficiencies and chemical overuse. This study [...]
SIM4Action: An Interactive Platform for Social-Environmental Systems Mapping and Causal Analysis
Published: 2026-03-25
Subjects: Environmental Engineering, Environmental Studies, Hydraulic Engineering, Life Sciences
SIM4Action is an open-source, browser-based platform for participatory analysis of complex socio-environmental systems through interactive causal network graphs. Existing systems mapping tools require practitioners to combine separate software for map construction, network analysis, and causal simulation; none provides an integrated workflow accessible to non-technical stakeholders. SIM4Action [...]
Agentic Modelling Pipeline: Reproducible Rapid Stormwater Modelling Management System with OpenClaw
Published: 2026-03-17
Subjects: Civil and Environmental Engineering, Civil Engineering, Computational Engineering, Engineering, Environmental Engineering, Hydraulic Engineering
Configuring urban hydrological models, such as SWMM, for operational or real-time modelling remains onerous for many models. We propose an Agentic SWMM workflow, which embeds ‘Skills’ and model context protocols to automate model configuration, execution, and extract and plot quantities of interest. To ensure that the entire Agentic SWMM workflow is auditable and reproducible, each run will [...]
Probabilistic modelling of pharmaceutical pollution risk from sewage treatment work discharges using a Bayesian Network: application to a Scottish river catchment
Published: 2026-03-16
Subjects: Earth Sciences, Environmental Engineering, Environmental Monitoring, Environmental Sciences, Hydrology, Pharmacology, Toxicology and Environmental Health, Statistical Models, Statistics and Probability, Water Resource Management
Pharmaceuticals are increasingly recognised as a class of emerging contaminants of concern in rivers. Their continuous release from human use and variable removal in sewage treatment works (STWs) can produce ecologically relevant concentrations and contribute to antimicrobial resistance. We developed a probabilistic catchment-scale model based on a Bayesian Network (BN) to quantify pharmaceutical [...]