Record Display for the EPA National Library Catalog


Main Title Comparison of Mid-Bay and lateral station water quality data in the Chesapeake Bay Mainstem : Chespaeake Bay Program.
CORP Author Environmental Protection Agency, Annapolis, MD. Chesapeake Bay Program.
Publisher Printed by the U.S. Environmental Protection Agency for the Chesapeake Bay Program,
Year Published 1993
Report Number CBP/TRS 74/93
Stock Number PB93-208288
OCLC Number 31061619
Subjects Water quality monitoring stations--Chesapeake Bay (Md. and Va.) ; Chesapeake Bay (Md. and Va.)
Additional Subjects Statistical tests ; Water quality data ; Chesapeake Bay ; Water pollution sampling ; Comparison ; Median(Statistics) ; Seasonal variations ; Periodic variations ; Nitrogen ; Phosphorus ; Inorganic nitrogen compounds ; Salinity ; Chlorophylls ; Depth ; Dissolved oxygen ; Correlation ; Differences ; Aquatic plants ; Graphs(Charts) ; Maps ; Total suspended solids
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJAM  TD225.C54W177 1993 Region 3 Library/Philadelphia, PA 02/16/1996
EJDD  CB 00623 Env Science Center Library/Ft Meade,MD 09/16/1994
NTIS  PB93-208288 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xiv, 81 p. : ill. ; 28 cm.
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.
"June 1993."