Filtering by Subject: Engineering

Stochastic properties of coastal flooding events -- Part 2: Probabilistic analysis

Byungho Kang, Rusty Feagin, Thomas Huff, et al.

Published: 2023-03-23
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering

Low-intensity but high-frequency coastal flooding, also known as nuisance flooding, can negatively affect low-lying coastal communities with potentially large socioeconomic effects. This flooding also can greatly affect post-storm coastal dune recovery and reduce the long-term resilience of the back-barrier ecosystem. Recent analytical work has hypothesized that these frequent flooding events are [...]

Stochastic properties of coastal flooding events -- Part 1: CNN-based semantic segmentation for water detection

Byungho Kang, Rusty Feagin, Thomas Huff, et al.

Published: 2023-03-23
Subjects: Engineering

The frequency and intensity of coastal flooding is expected to accelerate in low-elevation coastal areas due to sea level rise. Coastal flooding due to wave runup affects coastal ecosystems and infrastructure, however it can be difficult to monitor in remote and vulnerable areas. Here we use a camera-based system to monitor wave runup as part of the after-storm recovery of an eroded beach on the [...]

A probabilistic displacement hazard assessment framework for distributed ruptures from strike-slip earthquakes

Alba Mar Rodriguez Padilla, Michael Eugene Oskin

Published: 2023-03-19
Subjects: Engineering, Physical Sciences and Mathematics

Widespread distributed fracturing during earthquakes threatens infrastructure and lifelines. We combine high-resolution rupture maps from the five major surface-rupturing strike-slip earthquakes in southern California and northern Mexico since 1992 to incorporate the displacements produced by secondary ruptures into a probabilistic displacement hazard analysis framework. Through analysis of the [...]

Geo-Spatial Analysis of Built-Environment Exposure to Flooding: Iowa Case Study

Yazeed Alabbad, Ibrahim Demir

Published: 2023-03-15
Subjects: Civil and Environmental Engineering, Civil Engineering, Engineering, Risk Analysis

Flooding is the most frequent type of natural disaster, inducing devastating damages at large and small spatial scales. Flood exposure analysis is a critical part of flood risk assessment. While most studies analyze the exposure elements separately, it is crucial to perform a multi-parameter exposure analysis and consider different types of flood zones to gain a comprehensive understanding of the [...]

Traditional and Artificial Intelligence based techniques to measure trees: an overview

Catarina dos Santos Gonçalves Candeias

Published: 2023-03-14
Subjects: Engineering

To address the problem of climate changes, CO2 sequestration by forests should be assessed. Forests store carbon in their biomass- about half of it is carbon. The trees’ diameter, height and age are relevant parameters for forests’ biomass estimation. Various methods have been utilized to estimate forests’ biomass. Initially, field measurements using tape measures, clinometers and frequently a [...]

Time Series Analysis of terrain and climatic parameters data retrieved from Terraclimate dataset: A case study in Ranchi and Khunti district, Jharkhand, India

Yajnavalkya Bandyopadhyay, Nilanchal Patel

Published: 2023-03-13
Subjects: Civil Engineering, Engineering, Other Civil and Environmental Engineering

Climatic and Terrain parameters which include the soil moisture, precipitation, evapotranspiration, maximum and minimum temperature are the most crucial factors which drives the future of earth. Soil Moisture regulates the movement of water and heat energy between the land surface and the atmosphere through evaporationn and plant transpiration. Precipitation controls the entire operation of the [...]

Tropical or extratropical cyclones: what drives the compound flood hazard, impact, and risk for the United States Southeast Atlantic coast?

Kees Nederhoff, Tim Leijnse, Kai Parker, et al.

Published: 2023-03-10
Subjects: Engineering

Subtropical coastlines are impacted by both tropical and extratropical cyclones. While both may lead to substantial damage to coastal communities, it is difficult to determine the contribution of tropical cyclones in coastal flooding relative to that of extratropical cyclones. We conduct a large-scale flood hazard and impact assessment across the subtropical Southeast Atlantic Coast of the United [...]

Data-driven placement of PM2.5 air quality sensors in the United States: An approach to target urban environmental injustice

Makoto Michael Kelp, Timothy Fargiano, Samuel Lin, et al.

Published: 2023-03-03
Subjects: Engineering, Physical Sciences and Mathematics

In the United States, citizens and policymakers heavily rely upon Environmental Protection Agency (EPA) mandated regulatory networks to monitor air pollution; increasingly they also depend on low-cost sensor networks to supplement spatial gaps in regulatory monitor networks coverage. Although these regulatory and low-cost networks in tandem provide enhanced spatiotemporal coverage in urban areas, [...]

Modelling a Dam Breach failure: Case of study in the Chaglla Reservoir, Perú.

Adrian Fernandez Sanchez, Nestor Bernal López, Evelyng Peña Chávez, et al.

Published: 2023-02-21
Subjects: Engineering

The dam breaching is one of the events with the most catastrophic consequences among the risks due to fluvial flooding, given the intensity, the great extension of the affectation and the speed of the event. At present, various hydraulic modeling programs are capable of simulating the breach in the wall of a dam, as well as its possible subsequent flooding, granting speeds and drafts in the [...]

Investigation of Capillary Pressure Effects on Well Cleanup after Hydraulic Fracturing

Rong Lu

Published: 2023-02-19
Subjects: Education, Engineering

Nowadays hydraulic fracturing is becoming the most popular practice for low permeability reservoirs. While in some cases fractured wells show superior productivity than non-fractured wells, in other cases the effective fracture length which is used to channel gas and oil from reservoir to wellbore, is much shorter than the propped fracture length, thus leading to a lower-than-expected production [...]

Evidence of Early Supershear Transition in the Feb 6th 2023 Mw 7.8 Kahramanmaraş Turkey Earthquake From Near-Field Records

Ares J. Rosakis, Mohamed Abdelmeguid, Ahmed Elbanna

Published: 2023-02-15
Subjects: Aerospace Engineering, Civil and Environmental Engineering, Earth Sciences, Engineering, Mechanical Engineering, Physical Sciences and Mathematics

The Mw7.8 Kahramanmaraş Earthquake was larger and more destructive than what had been expected for the tectonic setting in Southeastern Turkey. By using near-field records we provide evidence for early supershear transition on the splay fault that hosted the nucleation and early propagation of the first rupture that eventually transitioned into the East Anatolian fault. We also find, for the [...]


Mina Karimi, Mehrdad Massoudi, Kaushik Dayal, et al.

Published: 2023-02-10
Subjects: Engineering, Physical Sciences and Mathematics

We investigate solution methods for large-scale inverse problems governed by partial differential equations (PDEs) via Bayesian inference. The Bayesian framework provides a statistical setting to infer uncertain parameters from noisy measurements. To quantify posterior uncertainty, we adopt Markov Chain Monte Carlo (MCMC) approaches for generating samples. To increase the efficiency of these [...]

Finite volume method for coupled surface-subsurface flows

Nathan Delpierre, Hadrien Rattez, Sandra Soares-Frazao

Published: 2023-02-10
Subjects: Engineering

Earthen embankments are subject to increasing threads because of climate change inducing sequences of severe drought periods followed by floods possibly leading to overtopping of the structures. Consequently, the water saturation of the dike can vary significantly both in space and time, and the resulting groundwater flow can affect the free-surface flow in case of overtopping. Conversely, the [...]

Sand Shoal Dynamics of a Tide-Dominated Estuarine Embayment: Comparison of a Numerical Sediment Transport Model against Field Observations

Ben Williams, Lex Nielsen, Will Glamore, et al.

Published: 2023-02-07
Subjects: Engineering, Environmental Engineering, Oceanography

This paper presents an innovative and detailed dataset of currents and sediment transport observations over a sand shoal system responsible for focusing wave energy on eroding coastline. The data are used to measure the performance of a detailed numerical sediment transport model of the sand shoal system. The predictive skill of the model is 0.96 for tidal elevations within Port Phillip Bay, 0.75 [...]


Lawrence Gottschamer, Jeffery Walters

Published: 2023-02-05
Subjects: Engineering, Social and Behavioral Sciences

Significant global sustainability challenges include among others, energy, climate, and sanitation. Previous Sustainability Transition research has attempted to understand transformation complexity and interdependence, primarily through single-case methodological studies or large-scale analytical frameworks such as the Multi-Level Perspective. This leaves a knowledge gap on common dynamics [...]


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