Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16909
Sediment deposition in Lake Clarke, Lake Aldred, and Conowingo Reservoir, Pennsylvania and Maryland, 1910-93 Sediment deposition in Lake Clarke, Lake Aldred, and Conowingo Reservoir, Pennsylvania and Maryland, 1910-93
The Susquehanna River carries a significant amount of the sediment and the nutrient load transported to the Chesapeake Bay. Three large hydroelectric dams are located near the mouth of the Susquehanna River. The three dams and associated reservoirs are Safe Harbor (Lake Clarke) and Holtwood (Lake Aldred) in southern Pennsylvania and Conowingo (Conowingo Reservoir) in northern Maryland...
Authors
Lloyd A. Reed, Scott A. Hoffman
Forty-first supplement to the American Ornithologists' Union Check-list of North American birds Forty-first supplement to the American Ornithologists' Union Check-list of North American birds
This seventh supplement after the publication of the 6th edition (1983) of the AOU Check-list of North American Birds includes taxonomic and nomenclatural changes adopted by the Committee on Classification and Nomenclature between 15 March 1995 and 15 March 1997. Because this will be the last supplement before the publication of the 7th edition of the Check-list, it also summarizes other...
Authors
Richard C. Banks, J.W. Fitzpatrick, T.R. Howell, N.K. Johnson, B.L. Monroe, H. Ouellet, J.V. Remsen, R.W. Storer
Continuous monitoring of dissolved oxygen and total dissolved gas pressure based on head-space partial pressures Continuous monitoring of dissolved oxygen and total dissolved gas pressure based on head-space partial pressures
We describe an instrument prototype that measures total dissolved gas pressure (TGP) and dissolved oxygen (DO) without need for standard wetted probe membranes or gas permeable tubing. Measurements were based instead on gas-phase partial pressures that develop within the head-space of a pressure vessel, and on Henry's Law. Performance trials established that differences between standard...
Authors
B.J. Watten, D. R. Smith, W. J. Ridge
Modified level II streambed-scour analysis for structure I-164-7-6974 crossing Schlensker Ditch in Vanderburgh County, Indiana Modified level II streambed-scour analysis for structure I-164-7-6974 crossing Schlensker Ditch in Vanderburgh County, Indiana
Level II scour evaluations follow a process in which hydrologic, hydraulic, and sedient-transport data are evaluated to calculate the depth of scour that may result when given discharge is routed through a bridge opening. the results of the modified Levell II analysis for structure I-674-7-6974 on Interstate 164 crossing Schlensker Ditch in Vanderburgh County, Indiana, are presented. The...
Authors
R. L. Miller, B.A. Robinson, D. C. Voelker
Modified level II streambed-scour analysis for structure I-64-83-5678 crossing Stinking Fork in Crawford County, Indiana Modified level II streambed-scour analysis for structure I-64-83-5678 crossing Stinking Fork in Crawford County, Indiana
Level II scour evaluations follow a process in which hydrologic, hydraulic, and sediment transport data are evaluated to calculate the depth of scour that may result when a given discharge is routed through a bridge opening. The results of the modified Level II analysis for structure 1-64-83-5678 on Interstate 64 crossing Stinking Fork in Crawford County, Indiana, are presented. The site...
Authors
B.A. Robinson, D. C. Voelker, R. L. Miller
Modified level II streambed-scour analysis for structure I-65-85-5527 crossing Sugar Creek in Johnson County, Indiana Modified level II streambed-scour analysis for structure I-65-85-5527 crossing Sugar Creek in Johnson County, Indiana
Level II scour evaluations follow a process in which hydrologic, hydraulic, and sediment transport data are evaluated to calculate the depth of scour that may result when a given discharge is routed through a bridge opening. The results of the modified Level II analysis for structure 1-65-85-5527 on Interstate 65 crossing Sugar Creek in Johnson County, Indiana, are presented. The site is...
Authors
B.A. Robinson, D. C. Voelker, R. L. Miller
Modified level II streambed-scour analysis for structure I-70-141-4972 crossing Greens Fork in Wayne County, Indiana Modified level II streambed-scour analysis for structure I-70-141-4972 crossing Greens Fork in Wayne County, Indiana
Level II scour evaluations follow a process in which hydrologic, hydraulic, and sediment transport data are evaluated to calculate the depth of scour that may result when a given discharge is routed through a bridge opening. The results of the modified Level II analysis for structure 1-70-141-4972 on Interstate 70 crossing Greens Fork in Wayne County, Indiana, are presented. The site is...
Authors
B.A. Robinson, D. C. Voelker, R. L. Miller
Modified level II streambed-scour analysis for structure I-275-0-5639 crossing the Ohio River in Dearborn County, Indiana Modified level II streambed-scour analysis for structure I-275-0-5639 crossing the Ohio River in Dearborn County, Indiana
Level II scour evaluations follow a process in which hydrologic, hydraulic, and sedient-transport data are evaluated to calculate the depth of scour that may result when given discharge is routed through a bridge opening. the results of the modified Levell II analysis for structure I-275-0-5639 on Interstate 275 crossing the Ohio River in Dearborn County, Indiana, are presented. The site...
Authors
R. L. Miller, B.A. Robinson, D. C. Voelker
In memoriam: John Warren Aldrich, 1906-1995 In memoriam: John Warren Aldrich, 1906-1995
John Aldrich was born in Providence, Rhode Island, on 23 February 1906, and went to the Providence public schools. He developed a broad interest in natural history at an early age, being stimulated by his mother, a kindergarten teacher, who introduced him to nature books. His interest was strengthened by Harold L. Madison, Director of the Park Museum in Providence, an Associate ( =...
Authors
Richard C. Banks
Egg dates for Virginia birds Egg dates for Virginia birds
No abstract available.
Authors
R. B. Clapp
Identification of potential water-bearing zones by the use of borehole geophysics in the vicinity of Keystone Sanitation Superfund Site, Adams County, Pennsylvania, and Carroll County, Maryland Identification of potential water-bearing zones by the use of borehole geophysics in the vicinity of Keystone Sanitation Superfund Site, Adams County, Pennsylvania, and Carroll County, Maryland
Between April 23, 1996, and June 21, 1996, the U.S. Environmental Protection Agency contracted Haliburton-NUS, Inc., to drill four clusters of three monitoring wells near the Keystone Sanitation Superfund Site. The purpose of the wells is to allow monitoring and sampling of shallow, intermediate, and deep waterbearing zones for the purpose of determining the horizontal and vertical...
Authors
Randall W. Conger