James Hatten (Former Employee)
Science and Products
Filter Total Items: 32
An ecohydraulic model to identify and monitor moapa dace habitat An ecohydraulic model to identify and monitor moapa dace habitat
Moapa dace (Moapa coriacea) is a critically endangered thermophilic minnow native to the Muddy River ecosystem in southeastern Nevada, USA. Restricted to temperatures between 26.0 and 32.0°C, these fish are constrained to the upper two km of the Muddy River and several small tributaries fed by warm springs. Habitat alterations, nonnative species invasion, and water withdrawals during the...
Authors
James R. Hatten, Thomas R. Batt, Gayton G. Scoppettone, Christopher J. Dixon
Hydraulic alterations resulting from hydropower development in the Bonneville Reach of the Columbia River Hydraulic alterations resulting from hydropower development in the Bonneville Reach of the Columbia River
We used a two-dimensional (2D) hydrodynamic model to simulate and compare the hydraulic characteristics in a 74-km reach of the Columbia River (the Bonneville Reach) before and after construction of Bonneville Dam. For hydrodynamic modeling, we created a bathymetric layer of the Bonneville Reach from single-beam and multi-beam echo-sounder surveys, digital elevation models, and...
Authors
James R. Hatten, Thomas R. Batt
A spatial model to assess the effects of hydropower operations on Columbia River fall Chinook Salmon spawning habitat A spatial model to assess the effects of hydropower operations on Columbia River fall Chinook Salmon spawning habitat
Priest Rapids Dam on the Columbia River produces large daily and hourly streamflow fluctuations throughout the Hanford Reach during the period when fall Chinook salmon Oncorhynchus tshawytscha are selecting spawning habitat, constructing redds, and actively engaged in spawning. Concern over the detrimental effects of these fluctuations prompted us to quantify the effects of variable...
Authors
James R. Hatten, Kenneth F. Tiffan, Donald R. Anglin, Steven L. Haeseker, Joseph J. Skalicky, Howard Schaller
A spatial model of white sturgeon rearing habitat in the lower Columbia River, USA A spatial model of white sturgeon rearing habitat in the lower Columbia River, USA
Concerns over the potential effects of in-water placement of dredged materials prompted us to develop a GIS-based model that characterizes in a spatially explicit manner white sturgeon Acipenser transmontanus rearing habitat in the lower Columbia River, USA. The spatial model was developed using water depth, riverbed slope and roughness, fish positions collected in 2002, and Mahalanobis...
Authors
J.R. Hatten, M.J. Parsley
Mapping and monitoring Mt. Graham Red Squirrel habitat with GIS and thematic mapper imagery Mapping and monitoring Mt. Graham Red Squirrel habitat with GIS and thematic mapper imagery
To estimate the Mt. Graham red squirrel (MGRS) population, personnel visit a proportion of middens each year to determine their occupancy (Snow in this vol.). The method results in very tight confidence intervals (high precision), but the accuracy of the population estimate is dependent upon knowing where all the middens are located. I hypothesized that there might be areas outside the...
Authors
James R. Hatten, John L. Koprowski
Science and Products
Filter Total Items: 32
An ecohydraulic model to identify and monitor moapa dace habitat An ecohydraulic model to identify and monitor moapa dace habitat
Moapa dace (Moapa coriacea) is a critically endangered thermophilic minnow native to the Muddy River ecosystem in southeastern Nevada, USA. Restricted to temperatures between 26.0 and 32.0°C, these fish are constrained to the upper two km of the Muddy River and several small tributaries fed by warm springs. Habitat alterations, nonnative species invasion, and water withdrawals during the...
Authors
James R. Hatten, Thomas R. Batt, Gayton G. Scoppettone, Christopher J. Dixon
Hydraulic alterations resulting from hydropower development in the Bonneville Reach of the Columbia River Hydraulic alterations resulting from hydropower development in the Bonneville Reach of the Columbia River
We used a two-dimensional (2D) hydrodynamic model to simulate and compare the hydraulic characteristics in a 74-km reach of the Columbia River (the Bonneville Reach) before and after construction of Bonneville Dam. For hydrodynamic modeling, we created a bathymetric layer of the Bonneville Reach from single-beam and multi-beam echo-sounder surveys, digital elevation models, and...
Authors
James R. Hatten, Thomas R. Batt
A spatial model to assess the effects of hydropower operations on Columbia River fall Chinook Salmon spawning habitat A spatial model to assess the effects of hydropower operations on Columbia River fall Chinook Salmon spawning habitat
Priest Rapids Dam on the Columbia River produces large daily and hourly streamflow fluctuations throughout the Hanford Reach during the period when fall Chinook salmon Oncorhynchus tshawytscha are selecting spawning habitat, constructing redds, and actively engaged in spawning. Concern over the detrimental effects of these fluctuations prompted us to quantify the effects of variable...
Authors
James R. Hatten, Kenneth F. Tiffan, Donald R. Anglin, Steven L. Haeseker, Joseph J. Skalicky, Howard Schaller
A spatial model of white sturgeon rearing habitat in the lower Columbia River, USA A spatial model of white sturgeon rearing habitat in the lower Columbia River, USA
Concerns over the potential effects of in-water placement of dredged materials prompted us to develop a GIS-based model that characterizes in a spatially explicit manner white sturgeon Acipenser transmontanus rearing habitat in the lower Columbia River, USA. The spatial model was developed using water depth, riverbed slope and roughness, fish positions collected in 2002, and Mahalanobis...
Authors
J.R. Hatten, M.J. Parsley
Mapping and monitoring Mt. Graham Red Squirrel habitat with GIS and thematic mapper imagery Mapping and monitoring Mt. Graham Red Squirrel habitat with GIS and thematic mapper imagery
To estimate the Mt. Graham red squirrel (MGRS) population, personnel visit a proportion of middens each year to determine their occupancy (Snow in this vol.). The method results in very tight confidence intervals (high precision), but the accuracy of the population estimate is dependent upon knowing where all the middens are located. I hypothesized that there might be areas outside the...
Authors
James R. Hatten, John L. Koprowski