Conference Papers
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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Variation in freshwater growth and development among five New England Atlantic salmon (Salmo salar) populations reared in a common environment Variation in freshwater growth and development among five New England Atlantic salmon (Salmo salar) populations reared in a common environment
We examined phenotypic variation in growth and development from the eyed-egg stage to the age-1+ smolt stage among five New England populations of Atlantic salmon (Salmo salar: East Machias, Narraguagus, Sheepscot, Penobscot, Connecticut) reared in a common laboratory environment. Study populations originated from rivers varying in size, latitude, and level of hatchery supplementation...
Authors
M. Obedzinski, B. H. Letcher
Visual enhancement of unmixed multispectral imagery using adaptive smoothing Visual enhancement of unmixed multispectral imagery using adaptive smoothing
Adaptive smoothing (AS) has been previously proposed as a method to smooth uniform regions of an image, retain contrast edges, and enhance edge boundaries. The method is an implementation of the anisotropic diffusion process which results in a gray scale image. This paper discusses modifications to the AS method for application to multi-band data which results in a color segmented image...
Authors
G.P. Lemeshewsky
Water loss in the Potomac River basin during droughts Water loss in the Potomac River basin during droughts
The water loss phenomena in the Washington DC metropoliton area's (WMA) Potomac River water supply basin during droughts was analyzed. Gage errors, permitted withdrawals, evaporation, and transpiration by trees along the river were investigated to account for loss. The Interstate Commission on the Potomac River Basin (ICPRB) calculated potential gage error and examined permits to...
Authors
E.R. Hagen, J.E. Kiang, J.J.A. Dillow
Why aren't there more beaver in Rocky Mountain National Park? Why aren't there more beaver in Rocky Mountain National Park?
No abstract available.
Authors
B. W. Baker, D. Mitchell, H.C. Ducharme, T.R. Stanley, H.R. Peinetti
Winter growth and survival of juvenile Atlantic salmon (Salmo salar) in experimental raceways Winter growth and survival of juvenile Atlantic salmon (Salmo salar) in experimental raceways
We used experimental raceways to determine overwinter mortality of wild-reared immature and mature post-young-of-the-year Atlantic salmon (Salmo salar). Secondarily, we investigated the effects of differing treatments (velocity and shelter) on winter growth and survival. Overall survival from November to April was 94%, and survival of immature (98%) and mature (90%) parr, although...
Authors
D.L. Parrish, E.J. Hawes, K.G. Whalen
WTAQ - A computer program for aquifer-test analysis of confined and unconfined aquifers WTAQ - A computer program for aquifer-test analysis of confined and unconfined aquifers
Computer program WTAQ was developed to implement a Laplace-transform analytical solution for axial-symmetric flow to a partially penetrating, finite-diameter well in a homogeneous and anisotropic unconfined (water-table) aquifer. The solution accounts for wellbore storage and skin effects at the pumped well, delayed response at an observation well, and delayed or instantaneous drainage...
Authors
P. M. Barlow, A.F. Moench
Thermochronology of secondary minerals from the Yucca Mountain unsaturated zone Thermochronology of secondary minerals from the Yucca Mountain unsaturated zone
No abstract available.
Authors
Joseph F. Whelan, Leonid A. Neymark, Edwin Roedder, Richard J. Moscati
Electrical imaging of tracer migration at the Massachusetts Military Reservation, Cape Cod Electrical imaging of tracer migration at the Massachusetts Military Reservation, Cape Cod
Electrical resistivity tomography (ERT) is examined as a method to provide spatially continuous information about aquifer properties through imaging of tracer flow and transport in an unconfined aquifer. Field data were collected at the Massachusetts Military Reservation, Cape Cod, Massachusetts, during the summer of 2002. High resolution images in both space and time of the movement of...
Authors
Kamini Singha, Andrew Binley, John W. Lane, Steven M. Gorelick
Object-based inversion of crosswell radar tomography data to monitor vegetable-oil injection experiment Object-based inversion of crosswell radar tomography data to monitor vegetable-oil injection experiment
Crosswell radar tomography methods can be used to dynamically image ground-water flow and mass transport associated with tracer tests, hydraulic tests, and natural physical processes. Dynamic imaging can be used to identify preferential flow paths and to help characterize complex aquifer heterogeneity. Unfortunately, because the raypath coverage of the interwell region is limited by the...
Authors
John W. Lane, Frederick D. Day-Lewis, Roelof J. Versteeg, C.C. Casey
Continuous-resistivity profiling for coastal ground-water investigations: Three case studies Continuous-resistivity profiling for coastal ground-water investigations: Three case studies
Continuous-resistivity profiling (CRP) was used at three sites to investigate submarine groundwater discharge (SGD) and to delineate the subsurface saltwater/freshwater interface. At the first site, in Georgetown, South Carolina, CRP was used to locate possible areas of SGD in the Winyah Bay estuary. The data show evidence of SGD in the Pee Dee River, feeding into Winyah Bay, at...
Authors
Marcel Belaval, John W. Lane, David P. Lesmes, G. C. Kineke
Geochemistry of dust in the Exploratory Studies Facility, Yucca Mountain, Nevada Geochemistry of dust in the Exploratory Studies Facility, Yucca Mountain, Nevada
No abstract available.
Authors
Zell E. Peterman, James B. Paces, Leonid A. Neymark, D. Hudson
Summary of Chlorine-36 validation studies at Yucca Mountain, Nevada Summary of Chlorine-36 validation studies at Yucca Mountain, Nevada
No abstract available.
Authors
James B. Paces, Zell E. Peterman, Leonid A. Neymark, G. J. Nimz, M. Gascoyne, Brian D. Marshall