Jeff Frey (Former Employee)
Science and Products
Filter Total Items: 29
Fish community and habitat data at selected sites in the White River Basin, Indiana, 1993-95 Fish community and habitat data at selected sites in the White River Basin, Indiana, 1993-95
No abstract available.
Authors
N.T. Baker, J.W. Frey
Use of remote-sensing techniques to survey the physical habitat of large rivers Use of remote-sensing techniques to survey the physical habitat of large rivers
Remote-sensing techniques that can be used to quantitatively characterize the physical habitat in large rivers in the United States where traditional survey approaches typically used in small- and medium-sized streams and rivers would be ineffective or impossible to apply. The state-of-the-art remote-sensing technologies that we discuss here include side-scan sonar, RoxAnn, acoustic...
Authors
Thomas A. Edsall, Thomas E. Behrendt, Gary Cholwek, Jeffery W. Frey, Gregory W. Kennedy, Stephen B. Smith
Water-quality assessment of the White River Basin, Indiana: Analysis of selected information on nutrients, 1980-92 Water-quality assessment of the White River Basin, Indiana: Analysis of selected information on nutrients, 1980-92
Water-quality data from 23 surfacewater-quality monitoring sites operated by the Indiana Department of Environmental Management and streamflow data from 11 U.S. Geological Survey streamflow-gaging stations in the White River Basin were analyzed to determine recent (1981 90 water years) water-quality conditions, trends, and river loads for ammonia, nitrate, total nitrogen, and total...
Authors
Jeffrey D. Martin, Charles G. Crawford, Jeffrey W. Frey, Glenn A. Hodgkins
Fishes of the White River basin, Indiana Fishes of the White River basin, Indiana
Since 1875, researchers have reported 158 species of fish belonging to 25 families in the White River Basin. Of these species, 6 have not been reported since 1900 and 10 have not been reported since 1943. Since the 1820's, fish communities in the White River Basin have been affected by the alteration of stream habitat, overfishing, the introduction of non-native species, agriculture, and
Authors
Charles G. Crawford, Michael J. Lydy, Jeffrey W. Frey
Assessment of water quality at selected sites in the White River Basin, Indiana, 1993 and 1995 using biological indices Assessment of water quality at selected sites in the White River Basin, Indiana, 1993 and 1995 using biological indices
As part of the National Water Quality Assessment (NAWQA) Program, fish communities were sampled at 11 sites in the White River Basin, Indiana, in 1993 and 1995 to help determine water-quality conditions. Ninety-one species of fish with representatives from 18 families were collected in the basin. Total numbers of fish collected at every site increased between collection years. The Index...
Authors
Jeffrey W. Frey, N.T. Baker, M.J. Lydy, W.W. Stone
Science and Products
Filter Total Items: 29
Fish community and habitat data at selected sites in the White River Basin, Indiana, 1993-95 Fish community and habitat data at selected sites in the White River Basin, Indiana, 1993-95
No abstract available.
Authors
N.T. Baker, J.W. Frey
Use of remote-sensing techniques to survey the physical habitat of large rivers Use of remote-sensing techniques to survey the physical habitat of large rivers
Remote-sensing techniques that can be used to quantitatively characterize the physical habitat in large rivers in the United States where traditional survey approaches typically used in small- and medium-sized streams and rivers would be ineffective or impossible to apply. The state-of-the-art remote-sensing technologies that we discuss here include side-scan sonar, RoxAnn, acoustic...
Authors
Thomas A. Edsall, Thomas E. Behrendt, Gary Cholwek, Jeffery W. Frey, Gregory W. Kennedy, Stephen B. Smith
Water-quality assessment of the White River Basin, Indiana: Analysis of selected information on nutrients, 1980-92 Water-quality assessment of the White River Basin, Indiana: Analysis of selected information on nutrients, 1980-92
Water-quality data from 23 surfacewater-quality monitoring sites operated by the Indiana Department of Environmental Management and streamflow data from 11 U.S. Geological Survey streamflow-gaging stations in the White River Basin were analyzed to determine recent (1981 90 water years) water-quality conditions, trends, and river loads for ammonia, nitrate, total nitrogen, and total...
Authors
Jeffrey D. Martin, Charles G. Crawford, Jeffrey W. Frey, Glenn A. Hodgkins
Fishes of the White River basin, Indiana Fishes of the White River basin, Indiana
Since 1875, researchers have reported 158 species of fish belonging to 25 families in the White River Basin. Of these species, 6 have not been reported since 1900 and 10 have not been reported since 1943. Since the 1820's, fish communities in the White River Basin have been affected by the alteration of stream habitat, overfishing, the introduction of non-native species, agriculture, and
Authors
Charles G. Crawford, Michael J. Lydy, Jeffrey W. Frey
Assessment of water quality at selected sites in the White River Basin, Indiana, 1993 and 1995 using biological indices Assessment of water quality at selected sites in the White River Basin, Indiana, 1993 and 1995 using biological indices
As part of the National Water Quality Assessment (NAWQA) Program, fish communities were sampled at 11 sites in the White River Basin, Indiana, in 1993 and 1995 to help determine water-quality conditions. Ninety-one species of fish with representatives from 18 families were collected in the basin. Total numbers of fish collected at every site increased between collection years. The Index...
Authors
Jeffrey W. Frey, N.T. Baker, M.J. Lydy, W.W. Stone