Lori Sprague (Former Employee)
Science and Products
Filter Total Items: 46
Trends and status of flow, nutrients, and sediments for selected nontidal sites in the Chesapeake Bay Watershed, 1985-98 Trends and status of flow, nutrients, and sediments for selected nontidal sites in the Chesapeake Bay Watershed, 1985-98
Data from 30 stream sites in nontidal portions of the Chesapeake Bay Watershed were analyzed to document annual nutrient and sediment loads and trends for the period 1985 through 1998 as part of an annual water-quality update for the Chesapeake Bay Program. Annual loads were estimated by use of the U.S. Geological Survey ESTIMATOR model and are available upon request. Trends were...
Authors
Michael J. Langland, Joel D. Blomquist, Lori A. Sprague, Robert E. Edwards
Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed
Trends in nutrient loads and flow-adjusted concentrations in the major rivers entering Chesapeake Bay were computed on the basis of water-quality data collected between 1985 and 1998 at 29 monitoring stations in the Susquehanna, Potomac, James, Rappahannock, York, Patuxent, and Choptank River Basins. Two computer models?the Chesapeake Bay Watershed Model (WSM) and the U.S. Geological...
Authors
Lori A. Sprague, M. J. Langland, S.E. Yochum, R. E. Edwards, J. D. Blomquist, S.W. Phillips, G.W. Shenk, S. D. Preston
Atrazine adsorption and colloid-facilitated transport through the unsaturated zone Atrazine adsorption and colloid-facilitated transport through the unsaturated zone
One explanation for unexpectedly widespread ground water contamination from atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) may be the occurrence of colloid-facilitated transport, whereby the dissolved herbicide becomes adsorbed to mobile colloids that migrate through preferential flow-paths in the soil zone and into the ground water. The objectives of this study were to...
Authors
Lori A. Sprague, J.S. Herman, G.M. Hornberger, A.L. Mills
Monitoring nutrients in the major rivers draining to Chesapeake Bay Monitoring nutrients in the major rivers draining to Chesapeake Bay
No abstract available.
Authors
Donna L. Belval, Lori A. Sprague
Science and Products
Filter Total Items: 46
Trends and status of flow, nutrients, and sediments for selected nontidal sites in the Chesapeake Bay Watershed, 1985-98 Trends and status of flow, nutrients, and sediments for selected nontidal sites in the Chesapeake Bay Watershed, 1985-98
Data from 30 stream sites in nontidal portions of the Chesapeake Bay Watershed were analyzed to document annual nutrient and sediment loads and trends for the period 1985 through 1998 as part of an annual water-quality update for the Chesapeake Bay Program. Annual loads were estimated by use of the U.S. Geological Survey ESTIMATOR model and are available upon request. Trends were...
Authors
Michael J. Langland, Joel D. Blomquist, Lori A. Sprague, Robert E. Edwards
Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed
Trends in nutrient loads and flow-adjusted concentrations in the major rivers entering Chesapeake Bay were computed on the basis of water-quality data collected between 1985 and 1998 at 29 monitoring stations in the Susquehanna, Potomac, James, Rappahannock, York, Patuxent, and Choptank River Basins. Two computer models?the Chesapeake Bay Watershed Model (WSM) and the U.S. Geological...
Authors
Lori A. Sprague, M. J. Langland, S.E. Yochum, R. E. Edwards, J. D. Blomquist, S.W. Phillips, G.W. Shenk, S. D. Preston
Atrazine adsorption and colloid-facilitated transport through the unsaturated zone Atrazine adsorption and colloid-facilitated transport through the unsaturated zone
One explanation for unexpectedly widespread ground water contamination from atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) may be the occurrence of colloid-facilitated transport, whereby the dissolved herbicide becomes adsorbed to mobile colloids that migrate through preferential flow-paths in the soil zone and into the ground water. The objectives of this study were to...
Authors
Lori A. Sprague, J.S. Herman, G.M. Hornberger, A.L. Mills
Monitoring nutrients in the major rivers draining to Chesapeake Bay Monitoring nutrients in the major rivers draining to Chesapeake Bay
No abstract available.
Authors
Donna L. Belval, Lori A. Sprague