Charles G Crawford, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 68
Factors affecting pesticide occurrence and transport in a large Midwestern river basin
Several factors affect the occurrence and transport of pesticides in surface waters of the 29,400 km2 White River Basin in Indiana. A relationship was found between pesticide use and the average annual concentration of that pesticide in the White River, although this relationship varies for different classes of pesticides. About one percent of the mass applied of each of the commonly used agricult
Authors
Charles G. Crawford
A comparison of selected diversity, similarity, and biotic indices for detecting changes in benthic-invertebrate community structure and stream quality
Implementation of advanced wastewater treatment at the two municipal wastewater-treatment plants for Indianapolis, Indiana, resulted in substantial improvement in the quality of the receiving stream and significant changes in the benthic-invertebrate community. Diversity, similarity, and biotic indices were compared to determine which indices best reflected changes in the composition of the biota
Authors
M.J. Lydy, Charles G. Crawford, J.W. Frey
Environmental setting and natural factors and human influences affecting water quality in the White River Basin, Indiana
The White River Basin drains 11,349 square miles of central and southern Indiana and is one of 59 Study Units selected for water-quality assessment as part of the U.S. Geological Survey's National WaterQuality Assessment Program. Defining the environmental setting of the basin and identifying the natural factors and human influences that affect water quality are important parts of the assessment.
Authors
Douglas J. Schnoebelen, Joseph M. Fenelon, Nancy T. Baker, Jeffrey D. Martin, E. Randall Bayless, David V. Jacques, Charles G. Crawford
Trends in acetochlor concentrations in surface waters of the White River Basin, Indiana, 1994–96
Corn herbicides are used extensively in the White River Basin and account for about 70 percent of the total agricultural pesticide use in the basin. Acetochlor, a corn herbicide registered for use in 1994, is expected to reduce the total amount of corn herbicides used because of its broad-spectrum weed control and low use rates. Acetochlor is considered to be a probable human carcinogen, and its c
Authors
Charles G. Crawford
Influence of natural and human factors on pesticide concentrations in surface waters of the White River Basin, Indiana
Pesticide concentrations in surface waters of the White River Basin are affected by natural and human factors. For example, concentrations of atrazine, a herbicide widely used on corn in the White River Basin, tended to be higher in an agricultural basin with permeable, well-drained soils, than in an agricultural basin with less permeable, more poorly drained soils. Concentrations of butylate, ano
Authors
Charles G. Crawford
Suspended-sediment characteristics of Indiana streams, 1952-84
Suspended-sediment concentration and discharge data were collected at 7 daily record stations and 70 partial-record stations during 1952- 84. Median suspended-sediment concentrations ranged from 24 to 61 milligrams per liter at daily record stations; concentrations ranged from 6 to 539 milligrams per liter at partial-record stations. Most suspended sediment transported in Indiana streams is silt a
Authors
Charles G. Crawford, Lawrence J. Mansue
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 urbanizat
Authors
Charles G. Crawford, Michael J. Lydy, Jeffrey W. Frey
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 phosphorus. The
Authors
Jeffrey D. Martin, Charles G. Crawford, Jeffrey W. Frey, Glenn A. Hodgkins
Comparison of gas chromatography/mass spectrometry and immunoassay techniques on concentrations of atrazine in storm runoff
Gas chromatography/mass spectrometry (GC/MS) and enzyme-linked immunosorbent assay (ELISA) techniques were used to measure concentrations of dissolved atrazine in 149 surface-water samples. Samples were collected during May 1992–September 1993 near the mouth of the White River (Indiana) and in two small tributaries of the river. GC/MS was performed on a Hewlett-Packard 5971 A, with electron impact
Authors
Michael J. Lydy, D.S. Carter, Charles G. Crawford
Water-quality assessment of the upper Illinois River Basin in Illinois, Indiana, and Wisconsin: Major and trace elements in water, sediment, and biota, 1978-90
The distribution of 22 major and trace elements was examined in water, sediment, and biota in the upper Illinois River Basin in Illinois, Indiana, and Wisconsin as part of a pilot National Water-Quality Assessment project done by the U.S. Geological Survey from 1987 through 1990. The 22 elements are aluminum, antimony, arsenic, barium, beryllium, boron, cadmium, chromium, cobalt, copper, iron, lea
Authors
Faith A. Fitzpatrick, Barbara C. Scudder Eikenberry, J. Kent Crawford, Arthur R. Schmidt, Jennifer B. Sieverling
Occurrence of pesticides in the White River, Indiana, 1991-95
Pesticides (herbicides and insecticides) are used extensively in the White River Basin. Application of herbicides to corn and soybeans accounts for most of the use. The pesticides most frequently detected near the mouth of the White River during 1991-95 were the herbicides alachlor, atrazine, cyanazine, and metolachlor. The highest concentrations of herbicides in the river were typically found dur
Authors
Charles G. Crawford
Water-quality assessment of the White River Basin, Indiana: Analysis of available information on pesticides, 1972-92
An analysis of historical pesticide data (1972-92) for the White River was conducted as part of the U.S. Geological Survey National Water-Quality Assessment Program. Data on the presence of pesticides in streams, bottom sediments, fish, and ground waters were examined. Results are interpreted with respect to spatial, seasonal, and streamflow effects. Concentrations of water-soluble pesticides reac
Authors
Donna S. Carter, Michael J. Lydy, Charles G. Crawford
Science and Products
Filter Total Items: 68
Factors affecting pesticide occurrence and transport in a large Midwestern river basin
Several factors affect the occurrence and transport of pesticides in surface waters of the 29,400 km2 White River Basin in Indiana. A relationship was found between pesticide use and the average annual concentration of that pesticide in the White River, although this relationship varies for different classes of pesticides. About one percent of the mass applied of each of the commonly used agricult
Authors
Charles G. Crawford
A comparison of selected diversity, similarity, and biotic indices for detecting changes in benthic-invertebrate community structure and stream quality
Implementation of advanced wastewater treatment at the two municipal wastewater-treatment plants for Indianapolis, Indiana, resulted in substantial improvement in the quality of the receiving stream and significant changes in the benthic-invertebrate community. Diversity, similarity, and biotic indices were compared to determine which indices best reflected changes in the composition of the biota
Authors
M.J. Lydy, Charles G. Crawford, J.W. Frey
Environmental setting and natural factors and human influences affecting water quality in the White River Basin, Indiana
The White River Basin drains 11,349 square miles of central and southern Indiana and is one of 59 Study Units selected for water-quality assessment as part of the U.S. Geological Survey's National WaterQuality Assessment Program. Defining the environmental setting of the basin and identifying the natural factors and human influences that affect water quality are important parts of the assessment.
Authors
Douglas J. Schnoebelen, Joseph M. Fenelon, Nancy T. Baker, Jeffrey D. Martin, E. Randall Bayless, David V. Jacques, Charles G. Crawford
Trends in acetochlor concentrations in surface waters of the White River Basin, Indiana, 1994–96
Corn herbicides are used extensively in the White River Basin and account for about 70 percent of the total agricultural pesticide use in the basin. Acetochlor, a corn herbicide registered for use in 1994, is expected to reduce the total amount of corn herbicides used because of its broad-spectrum weed control and low use rates. Acetochlor is considered to be a probable human carcinogen, and its c
Authors
Charles G. Crawford
Influence of natural and human factors on pesticide concentrations in surface waters of the White River Basin, Indiana
Pesticide concentrations in surface waters of the White River Basin are affected by natural and human factors. For example, concentrations of atrazine, a herbicide widely used on corn in the White River Basin, tended to be higher in an agricultural basin with permeable, well-drained soils, than in an agricultural basin with less permeable, more poorly drained soils. Concentrations of butylate, ano
Authors
Charles G. Crawford
Suspended-sediment characteristics of Indiana streams, 1952-84
Suspended-sediment concentration and discharge data were collected at 7 daily record stations and 70 partial-record stations during 1952- 84. Median suspended-sediment concentrations ranged from 24 to 61 milligrams per liter at daily record stations; concentrations ranged from 6 to 539 milligrams per liter at partial-record stations. Most suspended sediment transported in Indiana streams is silt a
Authors
Charles G. Crawford, Lawrence J. Mansue
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 urbanizat
Authors
Charles G. Crawford, Michael J. Lydy, Jeffrey W. Frey
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 phosphorus. The
Authors
Jeffrey D. Martin, Charles G. Crawford, Jeffrey W. Frey, Glenn A. Hodgkins
Comparison of gas chromatography/mass spectrometry and immunoassay techniques on concentrations of atrazine in storm runoff
Gas chromatography/mass spectrometry (GC/MS) and enzyme-linked immunosorbent assay (ELISA) techniques were used to measure concentrations of dissolved atrazine in 149 surface-water samples. Samples were collected during May 1992–September 1993 near the mouth of the White River (Indiana) and in two small tributaries of the river. GC/MS was performed on a Hewlett-Packard 5971 A, with electron impact
Authors
Michael J. Lydy, D.S. Carter, Charles G. Crawford
Water-quality assessment of the upper Illinois River Basin in Illinois, Indiana, and Wisconsin: Major and trace elements in water, sediment, and biota, 1978-90
The distribution of 22 major and trace elements was examined in water, sediment, and biota in the upper Illinois River Basin in Illinois, Indiana, and Wisconsin as part of a pilot National Water-Quality Assessment project done by the U.S. Geological Survey from 1987 through 1990. The 22 elements are aluminum, antimony, arsenic, barium, beryllium, boron, cadmium, chromium, cobalt, copper, iron, lea
Authors
Faith A. Fitzpatrick, Barbara C. Scudder Eikenberry, J. Kent Crawford, Arthur R. Schmidt, Jennifer B. Sieverling
Occurrence of pesticides in the White River, Indiana, 1991-95
Pesticides (herbicides and insecticides) are used extensively in the White River Basin. Application of herbicides to corn and soybeans accounts for most of the use. The pesticides most frequently detected near the mouth of the White River during 1991-95 were the herbicides alachlor, atrazine, cyanazine, and metolachlor. The highest concentrations of herbicides in the river were typically found dur
Authors
Charles G. Crawford
Water-quality assessment of the White River Basin, Indiana: Analysis of available information on pesticides, 1972-92
An analysis of historical pesticide data (1972-92) for the White River was conducted as part of the U.S. Geological Survey National Water-Quality Assessment Program. Data on the presence of pesticides in streams, bottom sediments, fish, and ground waters were examined. Results are interpreted with respect to spatial, seasonal, and streamflow effects. Concentrations of water-soluble pesticides reac
Authors
Donna S. Carter, Michael J. Lydy, Charles G. Crawford