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Articles 1 - 10 of 10
Full-Text Articles in Physical Sciences and Mathematics
Understanding Patterns In Chesapeake Bay Water Clarity: The Importance Of Measurement, Location, And Physical Versus Biological Controls, Carl T. Friedrichs
Understanding Patterns In Chesapeake Bay Water Clarity: The Importance Of Measurement, Location, And Physical Versus Biological Controls, Carl T. Friedrichs
Presentations
No abstract provided.
Fractal Floc Properties In The Surface Waters Of A Partially-Mixed Estuary: Insights From Video Settling, Lisst, And Pump Sampling, Kelsey Fall, Carl T. Friedrichs, Grace M. Massey, David Bowers
Fractal Floc Properties In The Surface Waters Of A Partially-Mixed Estuary: Insights From Video Settling, Lisst, And Pump Sampling, Kelsey Fall, Carl T. Friedrichs, Grace M. Massey, David Bowers
Presentations
This study focuses on observations collected along the York River Estuary, major tidal tributary of the Chesapeake Bay, USA. Although microtidal in terms of tidal range, the partially-mixed York River Estuary experiences near-surface tidal currents of up to 1 m/s at spring tide (Friedrichs, 2009). Observations of particle properties were collected using a profiling system that includes a Laser InSitu Scattering and Transmissometry (LISST) 100X Type C instrument, a high-definition Particle Imaging Camera System (PICS) incorporating a video settling tube, and a high-speed pump sampler. At each sampling station, the profiler was lowered to a depth of 1-3m below the …
Evidence Of Muddy Aggregates As Resilient Pellets In Suspension Throughout The Water Column Using Traps And A Particle Image Camera System (Pics) In A Tidal Estuary, Grace Massey, Kelsey Fall, Carl Friedrichs, S. Jarrell Smith
Evidence Of Muddy Aggregates As Resilient Pellets In Suspension Throughout The Water Column Using Traps And A Particle Image Camera System (Pics) In A Tidal Estuary, Grace Massey, Kelsey Fall, Carl Friedrichs, S. Jarrell Smith
Presentations
Biogenic pelletization plays an important roll in the packaging of fine sediments to prevent their availability in contributing to the water clarity issues in coastal systems. On the order of 1000 5µm equivalent spherical diameter clay flocculi primary particles can be packaged in a single elliptical-inshape pellet, 100µm long and 30µm wide. This is a size consistent of those observed in our study area in the Clay Bank Area of the York River, a tributary of the Chesapeake Bay, Virginia, USA. If resuspended, this one pellet will have almost 25 times less surface area and thus have that much less …
Fractal Floc Properties In Estuarine Surface Waters: Insights From Video Settling, Lisst, And Pump Sampling, Kelsey Fall, Carl Friedrichs, Grace Massey, David Bowers
Fractal Floc Properties In Estuarine Surface Waters: Insights From Video Settling, Lisst, And Pump Sampling, Kelsey Fall, Carl Friedrichs, Grace Massey, David Bowers
Presentations
The goal of this study is to gain insight into the fractal properties of flocs in estuarine surface waters under conditions of variable floc size, density, concentration, and organic content. The properties of flocculated particles in estuarine surface waters are especially important to the fate of incident light, with direct ramifications for primary production, water quality, and optical remote sensing. Observations of particle properties were collected using a profiling system that includes a Laser In-Situ Scattering and Transmissometry (LISST) 100X Type C instrument, a high-definition Particle Imaging Camera System (PICS) incorporating a video settling tube, and a high-speed pump sampler. …
Water Clarity Patterns And Trends In The Open-Water Regions Of Chesapeake Bay And Its Tidal Tributaries, Carl T. Friedrichs
Water Clarity Patterns And Trends In The Open-Water Regions Of Chesapeake Bay And Its Tidal Tributaries, Carl T. Friedrichs
Presentations
No abstract provided.
Stac Review Panel For The Generalized Additive Model (Gam) Approach For Water Quality Trends In Tidal Waters, Carl T. Friedrichs
Stac Review Panel For The Generalized Additive Model (Gam) Approach For Water Quality Trends In Tidal Waters, Carl T. Friedrichs
Presentations
No abstract provided.
Parameterized Process Models For Underwater Munitions Expert System, Carl Friedrichs
Parameterized Process Models For Underwater Munitions Expert System, Carl Friedrichs
Presentations
No abstract provided.
Flocculation And Bed Consolidation In A Partially Mixed Estuary: An Idealized Numerical Sediment Transport Model, Courtney Harris, D. Tarpley, Carl Friedrichs, C. Sherwood
Flocculation And Bed Consolidation In A Partially Mixed Estuary: An Idealized Numerical Sediment Transport Model, Courtney Harris, D. Tarpley, Carl Friedrichs, C. Sherwood
Presentations
Particle settling velocity and bed erodibility impact the transport of suspended sediment to the first order, but are especially difficult to parameterize for the muds that often dominate estuarine sediments. For example, fine grained silts and clays typically form loosely bound aggregates (flocs) whose settling velocity can vary widely. Properties of flocculated sediment such as settling velocity and particle density are difficult to prescribe because they change in response to several factors, including salinity, suspended sediment concentration, turbulent mixing, organic content, and mineral composition. Additionally, mud consolidates after deposition, so that its erodibility changes over timescales of days to weeks …
Parameterized Process Models For Underwater Munitions Expert System, Carl Friedrichs
Parameterized Process Models For Underwater Munitions Expert System, Carl Friedrichs
Presentations
No abstract provided.
Synthesis: Understanding Of Chesapeake Bay Water Clarity Patterns, Carl Friedrichs
Synthesis: Understanding Of Chesapeake Bay Water Clarity Patterns, Carl Friedrichs
Presentations
No abstract provided.