Preprints
There are 5076 Preprints listed.
Features of crevasse splay deposits and sedimentary processes associated with levee breaching by the October 2019 flood of the Chikuma River, Central Japan
Published: 2023-03-31
Subjects: Earth Sciences, Sedimentology
Field investigations and analyses of modern crevasse splay deposits can both elucidate the processes of levee breaching and help to identify past crevasse splay deposits from geologic strata, thereby estimating the magnitudes of ancient river floods. In this study, we studied levee breach processes and crevasse splay deposits in order to determine the distribution characteristics of the [...]
Spatial Downscaling of Streamflow Data with Attention Based Spatio-Temporal Graph Convolutional Networks
Published: 2023-03-31
Subjects: Civil and Environmental Engineering, Computer Engineering, Engineering
Accurate streamflow data is vital for various climate modeling applications, including flood forecasting. However, many streams lack sufficient monitoring due to the high operational costs involved. To address this issue and promote enhanced disaster preparedness, management, and response, our study introduces a neural network-based method for estimating historical hourly streamflow in two [...]
The Application of CNN-Based Image Segmentation for Tracking Coastal Erosion and Post-Storm Recovery
Published: 2023-03-31
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Geomorphology
Coastal erosion due to extreme events can cause significant damage to coastal communities and deplete beaches. Post-storm beach recovery is a crucial natural process that rebuilds coastal morphology and reintroduces eroded sediment to the subaerial beach. However, monitoring the beach recovery, which occurs at various spatiotemporal scales, presents a significant challenge. This is due to, [...]
Has Tropical Cyclone Disaster Risk Increased in Bangladesh: Retrospective Analysis of Storm Information, Disaster Statistics, and Mitigation Measures
Published: 2023-03-31
Subjects: Physical Sciences and Mathematics, Risk Analysis, Social and Behavioral Sciences
Tropical cyclone (TC) disaster risk has likely increased in Bangladesh since the beginning of the 21st century. It is primarily due to the cumulative impact of rising coastal exposures such as population, insufficient funding to address disaster risks, and ineffective utilization of century-old early warning signals for TC. From 2000 to 2020, the average number of people affected by a Category [...]
Understanding and Assessing Demographic (In)Equity Resulting from Extreme Heat Exposure due to Lack of Tree Canopies in Norfolk, VA using Agent-Based Modeling
Published: 2023-03-31
Subjects: Biodiversity, Environmental Public Health, Environmental Studies, Human Geography, Public Health, Social and Behavioral Sciences, Statistics and Probability
Prolonged exposure to extreme heat can result in illness and death. In urban areas of dense concentrations of pavement, buildings, and other surfaces that absorb and retain heat, extreme heat conditions can arise regularly and create harmful environmental exposures for residents daily during certain parts of the year. Tree canopies provide shade and help to cool the environment, making mature [...]
Estimates on the possible annual seismicity of Venus
Published: 2023-03-31
Subjects: Planetary Geophysics and Seismology
There is a growing consensus that Venus is seismically active, although its level of seismicity could be very different from that of Earth due to the lack of plate tectonics. Here, we estimate upper and lower bounds on the expected annual seismicity of Venus by scaling the seismicity of the Earth. We consider different scaling factors for different tectonic settings and account for the lower [...]
Setting an ecological flow regime in a Mediterranean basin with limited data availability: the Locone River case study (S-E Italy)
Published: 2023-03-31
Subjects: Environmental Engineering, Other Ecology and Evolutionary Biology
The Environmental Flow regime (E-Flows) was defined as the flow regime necessary to support river ecosystems, which in turn support crops, the economy, sustainable livelihoods, and human well-being. Although a large number of methods for setting an E-Flow regime have been developed, E-Flows science is still an emerging discipline in non-perennial rivers because of the lack of specific guidelines [...]
Photosynthetically Active Radiation Separation Model for High-Latitude Regions in Agrivoltaic Systems Modelling
Published: 2023-03-31
Subjects: Agriculture, Power and Energy
Photosynthetically active radiation is a key parameter for modelling the photosynthetic behaviour of plants in response to sunlight and, subsequently, for determining crop yield. Separating photosynthetically active radiation into direct and diffuse components is of significance to agrivoltaic systems, which combine solar energy conversion and agricultural farming on the same portion of land. [...]
Environmental monitoring of antimicrobial resistant bacteria in North Carolina water and wastewater using the WHO Tricycle protocol in combination with membrane filtration and compartment bag test methods for detecting and quantifying ESBL E. coli
Published: 2023-03-31
Subjects: Civil and Environmental Engineering
Antimicrobial resistance (AMR) is a growing threat to human and animal health, and efforts to combat it require widespread, robust and practical monitoring of AMR presence in humans, animals, and the environment. Because early AMR monitoring efforts were cumbersome, costly, and lacked standardization, the WHO Tricycle Protocol (WHO TP) was developed and released in 2021 to standardize and [...]
Widespread Wood Placement and Regrading Drive Lateral Connectivity and Reworking of the Channel and Floodplain in a Valley Bottom Reset to Stage 0
Published: 2023-03-31
Subjects: Earth Sciences, Geomorphology, Physical Sciences and Mathematics
Valley bottom process reset, or the excavation of high surfaces and fill of incised channels combined with large wood addition, is a new method for creating multi-channel river-wetland corridors (also referred to as Stage 0 valley bottoms). Valley bottom process reset seeks to increase lateral flow and sediment connectivity to retain flow and sediment and kickstart geomorphic processes that may [...]
Reconciling fast and slow cooling during planetary formation as recorded in the main group pallasites
Published: 2023-03-31
Subjects: Cosmochemistry, Other Planetary Sciences, Physical Sciences and Mathematics, Planetary Geology, Planetary Sciences
Pallasite meteorites contain evidence for vastly different cooling timescales: rapid cooling at high temperatures (K/yrs) and slow cooling at lower temperatures (K/Myrs). Pallasite olivine also shows contrasting textures ranging from well-rounded to angular and fragmental, and some samples record chemical zoning. Previous pallasite formation models have required fortuitous changes to the parent [...]
A novel fluoro-electrochemical technique for classifying diverse marine nanophytoplankton
Published: 2023-03-31
Subjects: Life Sciences, Physical Sciences and Mathematics
To broaden our understanding of pelagic ecosystem responses to environmental change, it is essential that we improve the spatio-temporal resolution of in situ monitoring of phytoplankton communities. A key challenge for existing methods is in classifying and quantifying cells within the nanophytoplankton size range (2-20µm). This is particularly difficult when there are similarities in [...]
A shallow approximation for ice streams sliding over strong beds
Published: 2023-03-29
Subjects: Glaciology, Partial Differential Equations
Ice streams are regions of rapid ice sheet flow characterised by a high degree of sliding over a deforming bed. The Shallow Shelf Approximation (SSA) provides a convenient way to obtain closed-form approximations of the velocity and flux in a rapidly-sliding ice stream when the basal drag is much less than the driving stress. However, the validity of the SSA approximation breaks down when the [...]
Stationary surface waves and antidunes in dense pyroclastic density currents
Published: 2023-03-28
Subjects: Earth Sciences, Sedimentology, Volcanology
Stationary antidunes are a product of critical flow in open channel systems, but with poor preservation potential. They are related to the existence of stationary surface waves in the overriding current, but their existence in the dense pyroclastic density current regime has been unrecognized to date. Experiments presented here demonstrate that surface waves in simulated dense pyroclastic density [...]
Bayesian estimation of nonlinear centroid moment tensors using multiple seismic data sets
Published: 2023-03-27
Subjects: Earth Sciences, Geophysics and Seismology
Centroid moment tensor (CMT) parameters of earthquakes are routinely estimated to gain information on structures and regional tectonics. However, for small earthquakes (M<4), it is still challenging to determine CMTs due to the lack of high-quality waveform data. In this study, we propose to improve solutions for small earthquakes by incorporating multiple seismic data types in Bayesian joint [...]