David Schoellhamer (Former Employee)
Science and Products
Filter Total Items: 150
Tidal oscillation of sediment between a river and a bay: A conceptual model
A conceptual model of fine sediment transport between a river and a bay is proposed, based on observations at two rivers feeding the same bay. The conceptual model consists of river, transitional, and bay regimes. Within the transitional regime, resuspension, advection, and deposition create a mass of sediment that oscillates landward and seaward. While suspended, this sediment mass forms an estua
Authors
N. K. Ganju, D. H. Schoellhamer, J.C. Warner, M.F. Barad, S.G. Schladow
Floodtide pulses after low tides in shallow subembayments adjacent to deep channels
In shallow waters surface gravity waves (tides) propagate with a speed proportional to the square root of water depth (c=g(h+η)). As the ratio of free surface displacement to mean depth (η/h) approaches unity the wave will travel noticeably faster at high tide than at low tide, creating asymmetries in the tidal form. This physical process is explained analytically by the increased significance of
Authors
J.C. Warner, D. H. Schoellhamer, C.A. Ruhl, J.R. Burau
Spatial and temporal variability of suspended-sediment concentrations in a shallow estuarine environment
Shallow subembayments respond differently than deep channels to physical forces acting in estuaries. The U.S. Geological Survey measured suspended-sediment concentrations at five locations in Honker Bay, a shallow subembayment of San Francisco Bay, and the adjacent channel to investigate the spatial and temporal differences between deep and shallow estuarine environments. During the first fres
Authors
Catherine A. Ruhl, David H. Schoellhamer
Science support for salt pond restoration and management in south San Francisco Bay
No abstract available.
Authors
Kathleen M. Swanson, Gregory Shellenbarger, Kathleen D. Henderson, Jeanne S. DiLeo, David H. Schoellhamer
Tidal and vertical variability of floc characteristics
No abstract available.
Authors
N. K. Ganju, D. H. Schoellhamer
Quantifying the contributions of tidal wetlands to dissolved organic material in the San Francisco Estuary, California, USA
No abstract available.
Authors
B.A. Bergamaschi, B.A Downing, G.A Wheeler, D. H. Schoellhamer, N. Ganju, M.S. Fram, D.E. Erickson, C. Kendall, B.E. Bemis, R. Stepanauskas, J.T. Hollibaugh, R. Fujii
Comparison of salinity and temperature at continuous monitoring stations and nearby monthly measurement sites in San Francisco Bay
Salinity and temperature are crucial state variables affecting estuarine habitat an d, thus, are measured by various San Francisco Estuary programs. This article presents a comparison of salinity and temperature data collected at seven continuo us monitoring stations throughout San Francisco Bay (Figure 1) with data collected monthly by the US Geological Survey (USGS) research vessel ( RV ) Polari
Authors
L.G. Bergfeld, D. H. Schoellhamer
Tidal wetland fluxes of dissolved organic carbon and sediment at Browns Island, California: initial evaluation
Carbon and sediment fluxes from tidal wetlands are of increasing concern in the Sacramento-San Joaquin River Delta (Delta), because of drinking water issues and habitat restoration efforts. Certain forms of dissolved organic carbon (DOC) react with disinfecting chemicals used to treat drinking water, to form disinfection byproducts (DBPs), some of which are potential carcinogens. The contribution
Authors
N. K. Ganju, B. Bergamaschi, D. H. Schoellhamer
Desalinization, erosion, and tidal changes following the breaching of Napa salt pond 3
No abstract available.
Authors
K. M. Swanson, G.G. Shellenbarger, D. H. Schoellhamer, N. K. Ganju, N.D. Athearn, P.A. Buchanan
Seasonal and longitudinal homogeneity of suspended sediment in San Francisco Bay, California
No abstract available.
Authors
D. H. Schoellhamer, N. K. Ganju, J. W. Gartner, M.C. Murrell, S.A. Wright
Continuous monitoring of suspended sediment discharge in rivers by use of optical backscatterance sensors
No abstract available.
Authors
D. H. Schoellhamer, S.A. Wright
Continuous measurement of suspended-sediment discharge in rivers by use of optical backscatterance sensors
Optical sensors have been used to measure turbidity and suspended-sediment concentration by many marine and estuarine studies, and optical sensors can provide automated, continuous time series of suspended-sediment concentration and discharge in rivers. Three potential problems with using optical sensors are biological fouling, particle-size variability, and particle-reflectivity variability. Desp
Authors
D. H. Schoellhamer, S.A. Wright
Science and Products
Filter Total Items: 150
Tidal oscillation of sediment between a river and a bay: A conceptual model
A conceptual model of fine sediment transport between a river and a bay is proposed, based on observations at two rivers feeding the same bay. The conceptual model consists of river, transitional, and bay regimes. Within the transitional regime, resuspension, advection, and deposition create a mass of sediment that oscillates landward and seaward. While suspended, this sediment mass forms an estua
Authors
N. K. Ganju, D. H. Schoellhamer, J.C. Warner, M.F. Barad, S.G. Schladow
Floodtide pulses after low tides in shallow subembayments adjacent to deep channels
In shallow waters surface gravity waves (tides) propagate with a speed proportional to the square root of water depth (c=g(h+η)). As the ratio of free surface displacement to mean depth (η/h) approaches unity the wave will travel noticeably faster at high tide than at low tide, creating asymmetries in the tidal form. This physical process is explained analytically by the increased significance of
Authors
J.C. Warner, D. H. Schoellhamer, C.A. Ruhl, J.R. Burau
Spatial and temporal variability of suspended-sediment concentrations in a shallow estuarine environment
Shallow subembayments respond differently than deep channels to physical forces acting in estuaries. The U.S. Geological Survey measured suspended-sediment concentrations at five locations in Honker Bay, a shallow subembayment of San Francisco Bay, and the adjacent channel to investigate the spatial and temporal differences between deep and shallow estuarine environments. During the first fres
Authors
Catherine A. Ruhl, David H. Schoellhamer
Science support for salt pond restoration and management in south San Francisco Bay
No abstract available.
Authors
Kathleen M. Swanson, Gregory Shellenbarger, Kathleen D. Henderson, Jeanne S. DiLeo, David H. Schoellhamer
Tidal and vertical variability of floc characteristics
No abstract available.
Authors
N. K. Ganju, D. H. Schoellhamer
Quantifying the contributions of tidal wetlands to dissolved organic material in the San Francisco Estuary, California, USA
No abstract available.
Authors
B.A. Bergamaschi, B.A Downing, G.A Wheeler, D. H. Schoellhamer, N. Ganju, M.S. Fram, D.E. Erickson, C. Kendall, B.E. Bemis, R. Stepanauskas, J.T. Hollibaugh, R. Fujii
Comparison of salinity and temperature at continuous monitoring stations and nearby monthly measurement sites in San Francisco Bay
Salinity and temperature are crucial state variables affecting estuarine habitat an d, thus, are measured by various San Francisco Estuary programs. This article presents a comparison of salinity and temperature data collected at seven continuo us monitoring stations throughout San Francisco Bay (Figure 1) with data collected monthly by the US Geological Survey (USGS) research vessel ( RV ) Polari
Authors
L.G. Bergfeld, D. H. Schoellhamer
Tidal wetland fluxes of dissolved organic carbon and sediment at Browns Island, California: initial evaluation
Carbon and sediment fluxes from tidal wetlands are of increasing concern in the Sacramento-San Joaquin River Delta (Delta), because of drinking water issues and habitat restoration efforts. Certain forms of dissolved organic carbon (DOC) react with disinfecting chemicals used to treat drinking water, to form disinfection byproducts (DBPs), some of which are potential carcinogens. The contribution
Authors
N. K. Ganju, B. Bergamaschi, D. H. Schoellhamer
Desalinization, erosion, and tidal changes following the breaching of Napa salt pond 3
No abstract available.
Authors
K. M. Swanson, G.G. Shellenbarger, D. H. Schoellhamer, N. K. Ganju, N.D. Athearn, P.A. Buchanan
Seasonal and longitudinal homogeneity of suspended sediment in San Francisco Bay, California
No abstract available.
Authors
D. H. Schoellhamer, N. K. Ganju, J. W. Gartner, M.C. Murrell, S.A. Wright
Continuous monitoring of suspended sediment discharge in rivers by use of optical backscatterance sensors
No abstract available.
Authors
D. H. Schoellhamer, S.A. Wright
Continuous measurement of suspended-sediment discharge in rivers by use of optical backscatterance sensors
Optical sensors have been used to measure turbidity and suspended-sediment concentration by many marine and estuarine studies, and optical sensors can provide automated, continuous time series of suspended-sediment concentration and discharge in rivers. Three potential problems with using optical sensors are biological fouling, particle-size variability, and particle-reflectivity variability. Desp
Authors
D. H. Schoellhamer, S.A. Wright