Record Display for the EPA National Library Catalog

RECORD NUMBER: 24 OF 71

OLS Field Name OLS Field Data
Main Title Comparison of Chesapeake Bay Estuary Model Calibration with 1985-1994 Observed Data and Method of Application to Water Quality Criteria.
CORP Author Environmental Protection Agency, Annapolis, MD. Chesapeake Bay Program.
Year Published 2002
Stock Number PB2011-112097
Additional Subjects Estuaries ; Chesapeake Bay ; Water quality ; Dissolved oxygen ; Clarity ; Chlorophyll ; Data comparison ; Sampling ; Target stations ; Tributaries ; Monitoring ; Methodology
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB2011-112097 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 03/09/2012
Collation 681p
Abstract
A comparison of modeling and monitoring data to examine model bias is the initial step in the application of the Chesapeake Bay Water Quality Model (CBWQM) to proposed water quality criteria. The proposed water quality criteria include dissolved oxygen (DO), clarity, and chlorophyll, each with fixed concentrations, durations, and frequency within specific regions of the Bay. Data comparison is based on all available mainstem and tributary monitoring data from 1985 to 1994 the full ten years of model calibration. Comparing the CBWQM estimates of DO, clarity, and chlorophyll to observations is used to detect uncertainty in the model calibration. A methodology is described in Section 2, to correct for systematic model errors in the three proposed water quality criteria. The methodology is applied to all regions of the Bay. Each observation of the three proposed water quality criteria is compared to a model computation taken at the same time and location in model space. The comparison is made only for the critical season of each of the proposed water quality criteria, e.g., March-May for the spring criteria of chlorophyll, and July-August for the summer criteria of chlorophyll. Comparisons are made for each proposed criteria at each CB Criteria Segment (CBCS). A CBCS is here defined as an area delineated by the planer boundaries of a CB segment, and temporally and spatially by the definitions of the proposed water quality criteria for DO, chlorophyll, or clarity. Table 1 lists the Chesapeake Bay (CB) segments assessed by this report and the associated monitoring stations.