Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16759
Preliminary effects of streambank fencing of pasture land on the quality of surface water in a small watershed in Lancaster County, Pennsylvania Preliminary effects of streambank fencing of pasture land on the quality of surface water in a small watershed in Lancaster County, Pennsylvania
The use of fencing to exclude pastured animals from streams has been recognized as an agricultural best-management practice. Streambank fencing was installed in a small basin within the Mill Creek Watershed of Lancaster County, Pa., during summer 1997 to evaluate the effectiveness of fencing on surface-water quality. A preliminary review of data collected during a pre-treatment, or...
Authors
Daniel G. Galeone
Stress history and geotechnical properties of sediment from the Cape Fear Diapir, Blake Ridge Diapir, and Blake Ridge Stress history and geotechnical properties of sediment from the Cape Fear Diapir, Blake Ridge Diapir, and Blake Ridge
Geotechnical properties of sediment from Ocean Drilling Program Leg 164 are presented as: (1) normalized shipboard strength ratios from the Cape Fear Diapir, the Blake Ridge Diapir, and the Blake Ridge; and (2) Atterberg limit, vane shear strength, pocket-penetrometer strength, and constant-rate-of-strain consolidation results from Hole 995A, located on the Blake Ridge. This study was...
Authors
W.J. Winters
Composting fish carcasses at a hatchery Composting fish carcasses at a hatchery
No abstract available.
Authors
C. E. Starliper
Altitude and configuration of the water-table surface in the vicinity of the Defense Supply Center, Philadelphia and the Point Breeze Refinery, Philadelphia, Pennsylvania, September 22, 1998 Altitude and configuration of the water-table surface in the vicinity of the Defense Supply Center, Philadelphia and the Point Breeze Refinery, Philadelphia, Pennsylvania, September 22, 1998
No abstract available
Authors
Curtis L. Schreffler
The 1995 and 1997 best projects The 1995 and 1997 best projects
No abstract available at this time
Authors
C. J. Schmitt, D. E. Tillitt, V. S. Blazer
Change in field turbidity and trace element concentrations during well purging Change in field turbidity and trace element concentrations during well purging
Various physical and chemical properties were monitored sequentially in the field during well purging as indicators of stabilization of the composition of the water in the well. Turbidity was monitored on site during purging of oxic water from three wells with screened intervals open to an unconfined aquifer system in the Coastal Plain of southern New Jersey to determine if stabilization...
Authors
J. Gibs, Zoltan Szabo, T. Ivahnenko, F.D. Wilde
Laboratory measurements of compressional and shear wave speeds through methane hydrate Laboratory measurements of compressional and shear wave speeds through methane hydrate
Simultaneous measurements of compressional and shear wave speeds through polycrystalline methane hydrate have been made. Methane hydrate, grown directly in a wave speed measurement chamber, was uniaxially compacted to a final porosity below 2%. At 277 K, the compacted material had a compressional wave speed of 3650 ?? 50 m/s. The shear wave speed, measured simultaneously, was 1890 ?? 30...
Authors
W.F. Waite, M.B. Helgerud, A. Nur, J.C. Pinkston, L.A. Stern, S. H. Kirby, W.B. Durham
The urban environmental gradient: Anthropogenic influences on the spatial and temporal distributions of lead and zinc in sediments The urban environmental gradient: Anthropogenic influences on the spatial and temporal distributions of lead and zinc in sediments
Urban settings are a focal point for environmental contamination due to emissions from industrial and municipal activities and the widespread use of motor vehicles. As part of the National Water-Quality Assessment Program of the U.S. Geological Survey, streambed-sediment and dated reservoir-sediment samples were collected from the Chattahoochee River Basin and analyzed for total lead (Pb...
Authors
Edward Callender, Karen C. Rice
Geophysical evidence for the evolution of the California Inner Continental Borderland as a metamorphic core complex Geophysical evidence for the evolution of the California Inner Continental Borderland as a metamorphic core complex
We use new seismic and gravity data collected during the 1994 Los Angeles Region Seismic Experiment (LARSE) to discuss the origin of the California Inner Continental Borderland (ICB) as an extended terrain possibly in a metamorphic core complex mode. The data provide detailed crustal structure of the Borderland and its transition to mainland southern California. Using tomographic...
Authors
Uri S. ten Brink, Jie Zhang, Thomas M. Brocher, David A. Okaya, Kim D. Klitgord, Gary S. Fuis
Habitat and landscape correlates of presence, density, and species richness of birds wintering in forest fragments in Ohio Habitat and landscape correlates of presence, density, and species richness of birds wintering in forest fragments in Ohio
We investigated the distribution of wintering woodland bird species in 47 very small, isolated, woodland fragments (0.54-6.01 ha) within an agricultural landscape in north-central Ohio. Our objectives were to determine correlations between temporal, habitat, and landscape variables and avian presence, density, and species richness within the smallest woodlots occupied by such species...
Authors
Paul F. Doherty, Thomas C. Grubb
Geographic analysis of species richness and community attributes of forest birds from survey data in the mid-Atlantic integrated assessment region Geographic analysis of species richness and community attributes of forest birds from survey data in the mid-Atlantic integrated assessment region
Species richness of local communities is a state variable commonly used in community ecology and conservation biology. Investigation of spatial and temporal variations in richness and identification of factors associated with these variations form a basis for specifying management plans, evaluating these plans, and for testing hypotheses of theoretical interest. However, estimation of...
Authors
Emmanuelle Cam, John R. Sauer, James D. Nichols, James E. Hines, Curtis H. Flather