Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10365
Soil characteristics and agrichemicals in groundwater of the Midwestern United States Soil characteristics and agrichemicals in groundwater of the Midwestern United States
A comprehensive set of soil characteristics were examined to determine the effect of soil on the transport of agrichemicals to groundwater. This paper examines the relation of soil characteristics to concentrations and occurrence nitrate, atrazine, and atrazine residue from 99 wells completed in unconsolidated aquifers across the Midwestern United States. Soil characteristics that...
Authors
M. Burkart, D.W. Kolpin, R.J. Jaquis, K. Cole
Occurrence, distribution, and transport of nutrients in Eastern Iowa Rivers Occurrence, distribution, and transport of nutrients in Eastern Iowa Rivers
Eleven streams in the Wapsipinicon, Cedar, Iowa, and Skunk River basins in eastern Iowa were sampled monthly from March 1996 through September 1998 to assess the occurrence, distribution, and transport of nitrogen, phosphorus, and suspended sediment as part of the U.S. Geological Survey's National Water-Quality Assessment Program. At least one form of dissolved nitrogen and phosphorus...
Authors
Kent Becher
Land-use changes and the physical habitat of streams - a review with emphasis on studies within the U.S. Geological Survey Federal-State Cooperative Program Land-use changes and the physical habitat of streams - a review with emphasis on studies within the U.S. Geological Survey Federal-State Cooperative Program
Understanding the links between land-use changes and physical stream habitat responses is of increasing importance to guide resource management and stream restoration strategies. Transmission of runoff and sediment to streams can involve complex responses of drainage basins, including time lags, thresholds, and cumulative effects. Land-use induced runoff and sediment yield often combine...
Authors
Robert B. Jacobson, Suzanne R. Femmer, Rose A. McKenney
The rainfall-triggered landslide and flash-flood disaster in northern Venezuela, December 1999 The rainfall-triggered landslide and flash-flood disaster in northern Venezuela, December 1999
Rainstorms in December 1999 induced thousands of landslides along the northern slopes of the Cordillera de la Costa mountain range principally in the state of Vargas, Venezuela. Rainfall accumulation of 293 millimeters during the first 2 weeks ofDecember was followed by an additional 911 millimeters of rainfall on December 14 through 16. The landslides and floods inundated coastal...
Authors
Matthew C. Larsen, Gerald F. Wieczorek, L.S. Eaton, Heriberto Torres-Sierra
Preplanting site treatments and natural invasion of tree species onto former agricultural fields at the Tensas River National Wildlife Refuge, Louisiana Preplanting site treatments and natural invasion of tree species onto former agricultural fields at the Tensas River National Wildlife Refuge, Louisiana
No abstract available.
Authors
John W. McCoy, Bobby D. Keeland, B.R. Lockhart, Thomas Dean
Measurement of sediment oxygen demand rates in the Mangrove Lagoon, Vessup Bay, and Benner Bay in southeastern St. Thomas, U.S. Virgin Islands Measurement of sediment oxygen demand rates in the Mangrove Lagoon, Vessup Bay, and Benner Bay in southeastern St. Thomas, U.S. Virgin Islands
No abstract available.
Authors
Orlando Ramos-Gines
New empirical models for estimating magnitude and frequency of flood for streams in Puerto Rico New empirical models for estimating magnitude and frequency of flood for streams in Puerto Rico
No abstract available.
Authors
Orlando Ramos-Gines
Measurement of sediment oxygen demand rates in the Mangrove Lagoon, Vessup Bay, and Benner Bay in southeastern St. Thomas, U.S. Virgin Islands Measurement of sediment oxygen demand rates in the Mangrove Lagoon, Vessup Bay, and Benner Bay in southeastern St. Thomas, U.S. Virgin Islands
No abstract available.
Authors
Orlando Ramos-Gines
Puerto Rico sources water assessment program Puerto Rico sources water assessment program
No abstract available.
Authors
Zuleima Rodriguez, Eva Hernandez, Orlando Ramos-Gines
Emerging scientific tools for studies of water quality, coral reef health, and watershed management in the tropics/Caribbean Emerging scientific tools for studies of water quality, coral reef health, and watershed management in the tropics/Caribbean
No abstract available.
Authors
Sharon A. Fitzgerald