Ronald Griffiths
Ron Griffiths is a hydrologist with the Southwest Biological Science Center.
Science and Products
Filter Total Items: 32
Design and maintenance of a network for collecting high-resolution suspended-sediment data at remote locations on rivers, with examples from the Colorado River Design and maintenance of a network for collecting high-resolution suspended-sediment data at remote locations on rivers, with examples from the Colorado River
Management of sand and finer sediment in fluvial settings has become increasingly important for reasons ranging from endangered-species habitat to transport of sediment-associated contaminants. In all rivers, some fraction of the suspended load is transported as washload, and some as suspended bed material. Typically, the washload is composed of silt-and-clay-size sediment, and the...
Authors
Ronald E. Griffiths, David J. Topping, Timothy Andrews, Glenn E. Bennett, Thomas A. Sabol, Theodore S. Melis
Sediment-transport during three controlled-flood experiments on the Colorado River downstream from Glen Canyon Dam, with implications for eddy-sandbar deposition in Grand Canyon National Park Sediment-transport during three controlled-flood experiments on the Colorado River downstream from Glen Canyon Dam, with implications for eddy-sandbar deposition in Grand Canyon National Park
Three large-scale field experiments were conducted on the Colorado River downstream from Glen Canyon Dam in 1996, 2004, and 2008 to evaluate whether artificial (that is, controlled) floods released from the dam could be used in conjunction with the sand supplied by downstream tributaries to rebuild and sustainably maintain eddy sandbars in the river in Grand Canyon National Park. Higher...
Authors
David J. Topping, David M. Rubin, Paul E. Grams, Ronald E. Griffiths, Thomas A. Sabol, Nicholas Voichick, Robert B. Tusso, Karen M. Vanaman, Richard R. McDonald
Field evaluation of sediment-concentration errors arising from Non-Isokinetic intake efficiency in depth-integrating suspended-sediment bag samplers Field evaluation of sediment-concentration errors arising from Non-Isokinetic intake efficiency in depth-integrating suspended-sediment bag samplers
No abstract available.
Authors
Thomas A. Sabol, David J. Topping, Ronald E. Griffiths
The use of the multi-dimensional surface-water modeling system (MD-SWMS) in calculating discharge and sediment transport in remote ephemeral streams The use of the multi-dimensional surface-water modeling system (MD-SWMS) in calculating discharge and sediment transport in remote ephemeral streams
No abstract available.
Authors
Peter G. Griffiths, David J. Topping, Richard R. McDonald, Thomas A. Sabol
Sedimentology and stratigraphy of the Palisades, Lower Comanche, and Arroyo Grande areas of the Colorado River Corridor, Grand Canyon, Arizona Sedimentology and stratigraphy of the Palisades, Lower Comanche, and Arroyo Grande areas of the Colorado River Corridor, Grand Canyon, Arizona
This report analyzes various depositional environments in three archaeologically significant areas of the Colorado River corridor in Grand Canyon. Archaeological features are built on and buried by fluvial, aeolian, and locally derived sediment, representing a complex interaction between geologic and cultural history. These analyses provide a basis for determining the potential influence...
Authors
Amy E. Draut, David M. Rubin, Jennifer L. Dierker, Helen C. Fairley, Ronald E. Griffiths, Joseph E. Hazel, Ralph E. Hunter, Keith Kohl, Lisa M. Leap, Fred L. Nials, David J. Topping, Michael Yeatts
Limnological aspects of the St. Clair River Limnological aspects of the St. Clair River
To better characterize neoplasm epizootics in the Great Lakes basin and their association with families of contaminants, we sampled five locations: the Fox and Menominee rivers, Lake Michigan; Munuscong Lake, St. Mary's River; and the Black and Cuyahoga rivers, Lake Erie. Frequencies of external and liver tumors were determined for brown bullhead (Ictalurus nebulosus) from all locations...
Authors
Ronald W. Griffiths, Stewart Thornley, Thomas A. Edsall
Distribution and dispersal of the zebra mussel (Dreissena polymorpha) in the Great Lakes region Distribution and dispersal of the zebra mussel (Dreissena polymorpha) in the Great Lakes region
Dreissena polymorpha (Pallas), a small mussel common throughout most of Europe, was discovered in June of 1988 in the southern part of Lake St. Clair. Length–frequency analyses of populations from the Great Lakes and review of historical benthic studies suggest that the mussel was introduced into Lake St. Clair in late 1986, probably as a result of the discharge of ballast water from an...
Authors
Ronald W. Griffiths, Donald W. Schloesser, Joseph H. Leach, William P. Kovalak
The zebra mussel, Dreissena polymorpha (Pallas, 1771), in North America: impact on raw water users The zebra mussel, Dreissena polymorpha (Pallas, 1771), in North America: impact on raw water users
The zebra mussel, Dreissena polymorpha (Pallas), is a small mollusc native to the Black, Caspian, and Azov Seas that was discovered in Lake Erie of the Laurentian Great Lakes of North America in 1988. Its presence there raises immediate concerns for users of raw water because it can become abundant enough to obstruct the flow of water through pipes, hoses, screens, and condensers...
Authors
Ronald W. Griffiths, William P. Kovalak, Donald W. Schloesser
Science and Products
Filter Total Items: 32
Design and maintenance of a network for collecting high-resolution suspended-sediment data at remote locations on rivers, with examples from the Colorado River Design and maintenance of a network for collecting high-resolution suspended-sediment data at remote locations on rivers, with examples from the Colorado River
Management of sand and finer sediment in fluvial settings has become increasingly important for reasons ranging from endangered-species habitat to transport of sediment-associated contaminants. In all rivers, some fraction of the suspended load is transported as washload, and some as suspended bed material. Typically, the washload is composed of silt-and-clay-size sediment, and the...
Authors
Ronald E. Griffiths, David J. Topping, Timothy Andrews, Glenn E. Bennett, Thomas A. Sabol, Theodore S. Melis
Sediment-transport during three controlled-flood experiments on the Colorado River downstream from Glen Canyon Dam, with implications for eddy-sandbar deposition in Grand Canyon National Park Sediment-transport during three controlled-flood experiments on the Colorado River downstream from Glen Canyon Dam, with implications for eddy-sandbar deposition in Grand Canyon National Park
Three large-scale field experiments were conducted on the Colorado River downstream from Glen Canyon Dam in 1996, 2004, and 2008 to evaluate whether artificial (that is, controlled) floods released from the dam could be used in conjunction with the sand supplied by downstream tributaries to rebuild and sustainably maintain eddy sandbars in the river in Grand Canyon National Park. Higher...
Authors
David J. Topping, David M. Rubin, Paul E. Grams, Ronald E. Griffiths, Thomas A. Sabol, Nicholas Voichick, Robert B. Tusso, Karen M. Vanaman, Richard R. McDonald
Field evaluation of sediment-concentration errors arising from Non-Isokinetic intake efficiency in depth-integrating suspended-sediment bag samplers Field evaluation of sediment-concentration errors arising from Non-Isokinetic intake efficiency in depth-integrating suspended-sediment bag samplers
No abstract available.
Authors
Thomas A. Sabol, David J. Topping, Ronald E. Griffiths
The use of the multi-dimensional surface-water modeling system (MD-SWMS) in calculating discharge and sediment transport in remote ephemeral streams The use of the multi-dimensional surface-water modeling system (MD-SWMS) in calculating discharge and sediment transport in remote ephemeral streams
No abstract available.
Authors
Peter G. Griffiths, David J. Topping, Richard R. McDonald, Thomas A. Sabol
Sedimentology and stratigraphy of the Palisades, Lower Comanche, and Arroyo Grande areas of the Colorado River Corridor, Grand Canyon, Arizona Sedimentology and stratigraphy of the Palisades, Lower Comanche, and Arroyo Grande areas of the Colorado River Corridor, Grand Canyon, Arizona
This report analyzes various depositional environments in three archaeologically significant areas of the Colorado River corridor in Grand Canyon. Archaeological features are built on and buried by fluvial, aeolian, and locally derived sediment, representing a complex interaction between geologic and cultural history. These analyses provide a basis for determining the potential influence...
Authors
Amy E. Draut, David M. Rubin, Jennifer L. Dierker, Helen C. Fairley, Ronald E. Griffiths, Joseph E. Hazel, Ralph E. Hunter, Keith Kohl, Lisa M. Leap, Fred L. Nials, David J. Topping, Michael Yeatts
Limnological aspects of the St. Clair River Limnological aspects of the St. Clair River
To better characterize neoplasm epizootics in the Great Lakes basin and their association with families of contaminants, we sampled five locations: the Fox and Menominee rivers, Lake Michigan; Munuscong Lake, St. Mary's River; and the Black and Cuyahoga rivers, Lake Erie. Frequencies of external and liver tumors were determined for brown bullhead (Ictalurus nebulosus) from all locations...
Authors
Ronald W. Griffiths, Stewart Thornley, Thomas A. Edsall
Distribution and dispersal of the zebra mussel (Dreissena polymorpha) in the Great Lakes region Distribution and dispersal of the zebra mussel (Dreissena polymorpha) in the Great Lakes region
Dreissena polymorpha (Pallas), a small mussel common throughout most of Europe, was discovered in June of 1988 in the southern part of Lake St. Clair. Length–frequency analyses of populations from the Great Lakes and review of historical benthic studies suggest that the mussel was introduced into Lake St. Clair in late 1986, probably as a result of the discharge of ballast water from an...
Authors
Ronald W. Griffiths, Donald W. Schloesser, Joseph H. Leach, William P. Kovalak
The zebra mussel, Dreissena polymorpha (Pallas, 1771), in North America: impact on raw water users The zebra mussel, Dreissena polymorpha (Pallas, 1771), in North America: impact on raw water users
The zebra mussel, Dreissena polymorpha (Pallas), is a small mollusc native to the Black, Caspian, and Azov Seas that was discovered in Lake Erie of the Laurentian Great Lakes of North America in 1988. Its presence there raises immediate concerns for users of raw water because it can become abundant enough to obstruct the flow of water through pipes, hoses, screens, and condensers...
Authors
Ronald W. Griffiths, William P. Kovalak, Donald W. Schloesser