Publications
The USGS publishes peer-reviewed reports and journal articles which are used by Chesapeake Bay Program resource managers and policy makers to make science-based decisions for ecosystem conservation and restoration. Use the Search box below to find publications on selected topics.
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Filter Total Items: 946
Chesapeake Bay striped bass: the consequences of habitat degradation Chesapeake Bay striped bass: the consequences of habitat degradation
No abstract available at this time
Authors
P.J. Rago
Evaluation of agricultural best-management practices in the Conestoga River headwaters, Pennsylvania; description and water quality of the Little Conestoga Creek headwaters prior to the implementation of nutrient management Evaluation of agricultural best-management practices in the Conestoga River headwaters, Pennsylvania; description and water quality of the Little Conestoga Creek headwaters prior to the implementation of nutrient management
The headwaters of the Conestoga River are being studied to determine the effects of agricultural Best-Management Practices on surface-water and ground-water quality. As part of this study, a 5.82-square-mile area of the Little Conestoga Creek headwaters (Small Watershed) was monitored during 1984-86, prior to implementation of Best-Management Practices. This report describes the land use...
Authors
D. K. Fishel, M. J. Brown, K. M. Kostelnik, M.A. Howse
Colonial wading birds: herons and egrets Colonial wading birds: herons and egrets
No abstract available.
Authors
R.M. Erwin, J. A. Spendelow
Effects of submersed macrophytes on dissolved oxygen, pH and temperature under different conditions of wind, tide and bed structure Effects of submersed macrophytes on dissolved oxygen, pH and temperature under different conditions of wind, tide and bed structure
Seasonal data on diurnal dissolved-oxygen concentration (DO), pH, temperature and chlorophyll-a were collected and species composition and vertical structure of macrophyte beds were analyzed in the tidal Potomac River during the 1987 growing season. The relationships among these variables and physical and climatic factors were analyzed. Elevated surface temperatures, DO and pH were found...
Authors
V. Carter, N. B. Rybicki, R.S. Hammerschlag
Tributary-stream infiltration in Marsh Creek Valley, north-central Pennsylvania Tributary-stream infiltration in Marsh Creek Valley, north-central Pennsylvania
The geohydrology of infiltration from five tributary streams along a 3.6-mile reach of Marsh Creek valley in north-central Pennsylvania was investigated during 1983-85. Marsh Creek valley is underlain by up to 100 feet of stratified drift that overlies Devonian bedrock. The stratified drift is overlain by up to 30 feet of alluvial-fan deposits near the tributary streams. Four of the five
Authors
John H. Williams
Hydrogeology and ground-water flow in the carbonate rocks of the Little Lehigh Creek basin, Lehigh County, Pennsylvania Hydrogeology and ground-water flow in the carbonate rocks of the Little Lehigh Creek basin, Lehigh County, Pennsylvania
The Little Lehigh Creek basin is underlain mainly by a complex assemblage of highly-deformed Cambrian and Ordovician carbonate rocks. The Leithsville Formation, Allentown Dolomite, Beekmantown Group, and Jacksonburg Limestone act as a single hydrologic unit. Ground water moves through fractures and other secondary openings and generally is under water-table conditions. Median annual...
Authors
R. A. Sloto, L.D. Cecil, L.A. Senior
Geohydrology, water availability, and water quality of Jefferson County, West Virginia, with emphasis on the carbonate area Geohydrology, water availability, and water quality of Jefferson County, West Virginia, with emphasis on the carbonate area
No abstract available.
Authors
M.D. Kozar, W.A. Hobba, J. A. Macy
Movements and survival of American black duck and mallard broods on Chesapeake Bay Movements and survival of American black duck and mallard broods on Chesapeake Bay
We attached radio transmitters to day-old American black duck (Anas rubripes) and mallard (A. platyrhynchos) ducklings and monitored duckling habitat use, brood movements, and survival rates for 30 days. Ducklings moved an average of 2.3 km within the first 24 hours and another 1.5 km thereafter. After the initial move, broods usually moved once more. No differences in initial movement...
Authors
D.G. Krementz, G.W. Pendleton
Consolidation and erosion of deposited cohesive sediments in Northern Chesapeake Bay, USA Consolidation and erosion of deposited cohesive sediments in Northern Chesapeake Bay, USA
Deposits of dredged cohesive sediments were monitored for changes in volume, bulk characteristics, and susceptibility to resuspension and erosion at disposal sites in Chesapeake Bay. There is a 23-48% volume reduction during the first six months, with correspondingly greater changes over longer time periods. A bulk density increase from 1.15 to 1.3 g/cm3 due to dewatering and compaction...
Authors
J. Halka, W. Panageotou, L. Sanford
Movements and bioenergetics of canvasbacks wintering in the upper Chesapeake Bay Movements and bioenergetics of canvasbacks wintering in the upper Chesapeake Bay
The movement patterns, range areas and energetics of canvasbacks (Aythya valisineria) wintering in the upper Chesapeake Bay, Maryland, were investigated. Eighty-seven juvenile female canvasbacks were radio-tracked between 30 December 1988 and 25 March 1989. Diurnal time and energy budgets were constructed for a time of day-season matrix for canvasbacks using riverine and main bay...
Authors
D.W. Howerter
Geohydrology and simulation of ground-water flow in the carbonate rocks of the Valley Creek basin, eastern Chester County, Pennsylvania Geohydrology and simulation of ground-water flow in the carbonate rocks of the Valley Creek basin, eastern Chester County, Pennsylvania
Sixty-eight percent of the 22.6-square-mile Valley Creek basin is underlain by Cambrian and Ordovician limestone and dolomite. Ground water flows through a network of interconnected secondary openings; primary porosity is virtually nonexistent. Some of these openings have been enlarged by solution. Secondary porosity and permeability exhibit great spatial variability, and the yield and...
Authors
R. A. Sloto
Light attenuation and submersed macrophyte distribution in the tidal Potomac River and estuary Light attenuation and submersed macrophyte distribution in the tidal Potomac River and estuary
Changing light availability may be responsible for the discontinuous distribution of submersed aquatic macrophytes in the freshwater tidal Potomac River. During the 1985-1986 growing seasons, light attenuation and chlorophyll a and suspended particulate material concentrations were measured in an unvegetated reach (B) and in two adjacent vegetated reaches (A and C). Light attenuation in...
Authors
V. Carter, N. B. Rybicki