Gary P Johnson (Former Employee)
Science and Products
Filter Total Items: 29
Physical and chemical data on sediments deposited in the Missouri and the Mississippi River flood plains during the July through August 1993 flood Physical and chemical data on sediments deposited in the Missouri and the Mississippi River flood plains during the July through August 1993 flood
Because sediments deposited by the 1993 floods on the Missouri and Mississippi rivers were thought to contain elevated concentrations of nutrients and trace elements, sediment deposits were sampled at 25 floodplain locations. The samples were analyzed for particle size, water content, volatile solids, nutrients, carbon, selected trace elements, pesticides, and semivolatile organic...
Authors
Gregg K. Schalk, Robert R. Holmes, Gary P. Johnson
Instruction manual for U.S. Geological Survey sediment observers Instruction manual for U.S. Geological Survey sediment observers
This instruction manual is intended for use by U.S. Geological Survey (USGS) Sediment Observers. An overview of the USGS Sediment Program is presented, and basic theory on sediment transport is explained. Step-by-step instructions on when and how to sample for sediment also are presented. USGS Sediment Observer safety issues are discussed and corrective actions are presented. An empty...
Authors
Gary P. Johnson
Application and limitations of dendrogeomorphic method to estimate sedimentation rate in the Kankakee River flood plain in Illinois Application and limitations of dendrogeomorphic method to estimate sedimentation rate in the Kankakee River flood plain in Illinois
No abstract available.
Authors
Gary P. Johnson
Dendrogeomorphic estimate of changes in sedimentation rate along the Kankakee River near Momence, Illinois Dendrogeomorphic estimate of changes in sedimentation rate along the Kankakee River near Momence, Illinois
Changes in sedimentation rates wee estimated using root-burial depth and tree-age data at six selected data-collection sites along the Kankakee River near Momence in Kankakee County, Illinois. Five sites were in backwater areas away from the river channel, and one site was on a natural levee near the channel. A summary of the dendrogeomorphic data at the six sites indicates that...
Authors
R.L. Phipps, G.P. Johnson, P. J. Terrio
Overview of South‐east Asia land cover using a NOAA AVHRR one kilometer composite Overview of South‐east Asia land cover using a NOAA AVHRR one kilometer composite
A cloud free AVHRR composite of South‐East Asia at one kilometer resolution has been produced from 38 selected daily NOAA‐11 AVHRR images. Geometric accuracy of about 1 pixel is achieved using a two‐step rectification algorithm (orbital model and transformation by ground control points). A spatial and spectral enhancement has been performed, the sea masked out and political boundaries...
Authors
Pierre Defourny, Udai C. Pradhan, Sritharan Vinay, Gary E. Johnson
The role of remotely sensed and other special data for predictive modeling: the Umatilla, Oregon example The role of remotely sensed and other special data for predictive modeling: the Umatilla, Oregon example
Landsat data and 1:24 000-scale aerial photographs were initially used to map the expansion of irrigation from 1973 to 1979 and to identify crops under irrigation in 1979. The crop data were then used with historical water requirement figures and digital topographic and hydrographic data to estimate water and power use for the 1979 irrigation season. The final project task involved...
Authors
Thomas R. Loveland, Gary E. Johnson
Science and Products
Filter Total Items: 29
Physical and chemical data on sediments deposited in the Missouri and the Mississippi River flood plains during the July through August 1993 flood Physical and chemical data on sediments deposited in the Missouri and the Mississippi River flood plains during the July through August 1993 flood
Because sediments deposited by the 1993 floods on the Missouri and Mississippi rivers were thought to contain elevated concentrations of nutrients and trace elements, sediment deposits were sampled at 25 floodplain locations. The samples were analyzed for particle size, water content, volatile solids, nutrients, carbon, selected trace elements, pesticides, and semivolatile organic...
Authors
Gregg K. Schalk, Robert R. Holmes, Gary P. Johnson
Instruction manual for U.S. Geological Survey sediment observers Instruction manual for U.S. Geological Survey sediment observers
This instruction manual is intended for use by U.S. Geological Survey (USGS) Sediment Observers. An overview of the USGS Sediment Program is presented, and basic theory on sediment transport is explained. Step-by-step instructions on when and how to sample for sediment also are presented. USGS Sediment Observer safety issues are discussed and corrective actions are presented. An empty...
Authors
Gary P. Johnson
Application and limitations of dendrogeomorphic method to estimate sedimentation rate in the Kankakee River flood plain in Illinois Application and limitations of dendrogeomorphic method to estimate sedimentation rate in the Kankakee River flood plain in Illinois
No abstract available.
Authors
Gary P. Johnson
Dendrogeomorphic estimate of changes in sedimentation rate along the Kankakee River near Momence, Illinois Dendrogeomorphic estimate of changes in sedimentation rate along the Kankakee River near Momence, Illinois
Changes in sedimentation rates wee estimated using root-burial depth and tree-age data at six selected data-collection sites along the Kankakee River near Momence in Kankakee County, Illinois. Five sites were in backwater areas away from the river channel, and one site was on a natural levee near the channel. A summary of the dendrogeomorphic data at the six sites indicates that...
Authors
R.L. Phipps, G.P. Johnson, P. J. Terrio
Overview of South‐east Asia land cover using a NOAA AVHRR one kilometer composite Overview of South‐east Asia land cover using a NOAA AVHRR one kilometer composite
A cloud free AVHRR composite of South‐East Asia at one kilometer resolution has been produced from 38 selected daily NOAA‐11 AVHRR images. Geometric accuracy of about 1 pixel is achieved using a two‐step rectification algorithm (orbital model and transformation by ground control points). A spatial and spectral enhancement has been performed, the sea masked out and political boundaries...
Authors
Pierre Defourny, Udai C. Pradhan, Sritharan Vinay, Gary E. Johnson
The role of remotely sensed and other special data for predictive modeling: the Umatilla, Oregon example The role of remotely sensed and other special data for predictive modeling: the Umatilla, Oregon example
Landsat data and 1:24 000-scale aerial photographs were initially used to map the expansion of irrigation from 1973 to 1979 and to identify crops under irrigation in 1979. The crop data were then used with historical water requirement figures and digital topographic and hydrographic data to estimate water and power use for the 1979 irrigation season. The final project task involved...
Authors
Thomas R. Loveland, Gary E. Johnson