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Comparison of mid-bay and lateral station water quality data in the Chesapeake Bay mainstem: Chesapeake Bay program

Technical Report ·
OSTI ID:6206167
Seasonal median water quality values were compared between stations in mid-Bay and lateral regions in seven east-west transects in the mainstem Chesapeake Bay. Comparisons were made over seven years, 1985-1991, for April-October surface layer medians of total phosphorus, total nitrogen, dissolved orthophosphate, dissolved inorganic nitrogen, total suspended solids, chlorophyll a, Secchi depth, and salinity. Comparisons were also made using spring (March-May) and summer (June-September) medians of surface and bottom salinity and dissolved oxygen. Comparisons were made using difference plots of raw data, scatter plots of annual seasonal medians, and the Wilcoxon matched-pairs test on annual seasonal medians. The graphical and statistical analyses confirmed each other. Correlation coefficients were also calculated between mid-Bay and lateral data series to estimate their degree of similarity over time, but could not be tested for statistical significance.
Research Organization:
Environmental Protection Agency, Annapolis, MD (United States). Chesapeake Bay Program
OSTI ID:
6206167
Report Number(s):
PB-93-208288/XAB; CBP/TRS--74/93
Country of Publication:
United States
Language:
English