Preprints
Filtering by Subject: Engineering
Reducing the Uncertainty of Multi-Well Petrophysical Interpretation from Well Logs via Machine-Learning and Statistical Models
Published: 2022-03-23
Subjects: Analysis, Earth Sciences, Engineering, Geophysics and Seismology, Mining Engineering, Multivariate Analysis, Statistical Methodology, Statistical Models
Well-log interpretation provides in situ estimates of formation properties such as porosity, hydrocarbon pore volume, and permeability. Reservoir models based on well-log-derived formation properties deliver reserve-volume estimates, production forecasts, and help with decision making in reservoir development. However, due to measurement errors, variability of well logs due to multiple [...]
Cloud-based interactive susceptibility modeling of natural hazards in Google Earth Engine
Published: 2022-03-17
Subjects: Engineering, Physical Sciences and Mathematics
We present an interactive tool for susceptibility modeling in Google Earth Engine (GEE). Our tool requires few input data and makes use of the breadth of predictors' information available in GEE. In this cloud computing environment, binary classifiers typical of susceptibility models can be called and fed with information related to mapping units and any natural hazards' distribution over the [...]
Mesoscale eddy variability in the CaribbeanSea
Published: 2022-03-03
Subjects: Engineering, Physical Sciences and Mathematics
The spatial distribution, the monthly and seasonal variability of mesoscale eddy-observations derived from the AVISO eddy atlas are assessed in the Caribbean Sea for the period between 1993 and 2019 (both included). The average lifetime for the whole set of eddies is 61.8±37.1days, mean amplitude of 7.4±4.2cm for ciclonic and 6.7±3.7cm for anticyclonic and mean radius [...]
Camera-Based Intelligent Stream Stage Sensing for Decentralized Environmental Monitoring
Published: 2022-03-02
Subjects: Artificial Intelligence and Robotics, Civil and Environmental Engineering, Electrical and Computer Engineering, Engineering, Environmental Monitoring, Water Resource Management
On average, flood damages cost $4.4 billion in the US annually. Accurate, vast, and real-time coverage of water level monitoring is crucial for the advancement of environmental research, specifically in the areas of climate change, water distribution, and natural disaster preparedness and management. According to a 2018 EPA report, there are 2.7 million streams and associated watersheds in the US [...]
A Techno-Economic Analysis of Australian Green Steel Production from Hydrogen
Published: 2022-02-15
Subjects: Engineering
Green steel - produced using hydrogen and electricity from renewable energy sources - provides both the means to decarbonize steel manufacturing and a way to facilitate growth of the international hydrogen industry. Australia, with its abundant renewable resources and ample iron-ore deposits, is in an excellent position to participate in this opportunity. We highlight the synergies between the [...]
Ageostrophic contribution by the wind and waves induced flow to the lateral stirring in the Mediterranean Sea
Published: 2022-02-11
Subjects: Engineering, Physical Sciences and Mathematics
We study the impact of the Ekman currents and Stokes drift on the horizontal mixing and transport properties of the Mediterranean Sea. FSLE at the ocean surface are computed over the whole basin using 25 years of satellite altimetry derived geostrophic currents, 10-m wind velocity and wave fields. We find that the transport pathways unveiled by the geostrophic Lagrangian Coherent Structures (LCS) [...]
Climate-Catchment-Soil Control on Hydrological Droughts in Peninsular India
Published: 2022-01-28
Subjects: Bioresource and Agricultural Engineering, Civil and Environmental Engineering, Earth Sciences, Engineering, Environmental Sciences, Mathematics, Risk Analysis
Most land surface system models and observational assessments ignore detailed soil characteristics while describing the drought attributes such as growth, duration, recovery, and the termination rate of the event. With the national-scale digital soil maps available for India, we assessed the climate-catchment-soil nexus using daily observed streamflow records from 98 sites in tropical [...]
Urban Flood Impact Assessment and Hazard Vulnerability Analysis: Iowa Case Study
Published: 2022-01-28
Subjects: Civil and Environmental Engineering, Engineering, Risk Analysis
Flooding is one of the most common natural disasters affecting communities worldwide. It is expected to persist with increasing magnitude and frequency as a result of climate change, resulting in both direct and indirect negative consequences. The flood impact assessment is considered as a key component of flood risk management strategies, such as benefit-cost analysis for mitigation planning. [...]
Multidimensional Governing Equations of Matrix Flow Component of Subsurface Stormflow as Function of Bedrock Surface Geometry
Published: 2022-01-28
Subjects: Civil and Environmental Engineering, Engineering, Physical Sciences and Mathematics
MODELLING EFFECTS OF FOREST FIRE AND POST-FIRE MANAGEMENT IN A CATCHMENT PRONE TO EROSION: Impacts on sediment yield
Published: 2022-01-27
Subjects: Engineering
The present paper contributes to bridging the gaps in modelling post-fire impact and mitigation measures on soil erosion. The specific aims were to predict the effects of forest fires and post-fire mitigation measures on runoff and specific sediment yield (SSY) in a river basin (Celone, S-E Italy). The Soil and Water Assessment Tool model, calibrated with field observations, was used to evaluate [...]
Nature Based Solutions for Sustainable Urban Storm Water Management in Global South: A Short Review
Published: 2022-01-16
Subjects: Engineering, Physical Sciences and Mathematics
Rapid urbanization in the Global South exacerbates urban water management challenges such as urban flooding and water pollution, rendering many areas water-insecure. Our reliance on grey infrastructures to combat these water management challenges is not sustainable in the long run, due to which a better alternative must be sought. Nature-based Solution (NBS) promote ecosystem services and enhance [...]
Fully distributed rainfall-runoff modeling using spatial-temporal graph neural network
Published: 2022-01-15
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Environmental Engineering, Hydrology
Recent studies using latest deep learning algorithms such as LSTM (Long Short-Term Memory) have shown great promise in time-series modeling. There are many studies focusing on the watershed-scale rainfall-runoff modeling or streamflow forecasting, often considering a single watershed with limited generalization capabilities. To improve the model performance, several studies explored an integrated [...]
Toward Real-time Microseismic Event Detection using the YOLOv3 Algorithm
Published: 2022-01-05
Subjects: Engineering, Physical Sciences and Mathematics
Real-time microseismic monitoring is essential for understanding fractures associated with underground fluid injection in unconventional reservoirs. However, microseismic events recorded on monitoring arrays are usually contaminated with strong noise. With a low signal-to-noise ratio (S/R), the detection of microseismic events is challenging using conventional detection methods such as the [...]
Energetic Formulation of Large-Deformation Poroelasticity
Published: 2022-01-03
Subjects: Engineering
The modeling of coupled fluid transport and deformation in a porous medium is essential to predict the various geomechanical process such as CO2 sequestration, hydraulic fracturing, and so on. Current applications of interest, for instance, that include fracturing or damage of the solid phase, require a nonlinear description of the large deformations that can occur. This paper presents a [...]
Agricultural Flood Vulnerability Assessment and Risk Quantification in Iowa
Published: 2021-12-31
Subjects: Engineering, Physical Sciences and Mathematics
Agricultural lands are often impacted by flooding, which results in economic losses and causes food insecurity across the world. Due to the world’s growing population, land-use alteration is frequently practiced to meet global demand. However, land-use changes combined with climate change have resulted in extreme hydrological changes (i.e., flooding and drought) in many areas. The state of Iowa [...]