United States Department of Transportation
ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners.
As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
i
Regression Equations for Estimating Flood Discharges for the Western Coastal Plain Region of Maryland
-
2019-11-01
[PDF-2.43 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:SPR-B Final Report (December 2018-November 2019)
-
Corporate Publisher:
-
Abstract:Regression equations were updated for estimating the 1.25-. 1.50-, 2-, 5-, 10-, 25-, 50-, 100-, 200- and 500-year flood discharges for the Western Coastal Plain Region of Maryland. The regression equations were based on flood discharges for 23 stations and drainage area, in square miles; impervious area, in percent of the watershed; and hydrologic soils group A, in percent of the watershed. For the 23 stations used in the analysis, 11 stations are still active and 12 are discontinued stations. For the active stations, six stations had significant upward trends in annual peak flows due to increasing urbanization and major floods near the end of the record. These trends were accounted for by using a time-varying mean and using a more homogeneous period of record. The updated regression equations will be used by the Maryland Department of Transportation State Highway Administration in the design of bridges and culverts in Maryland. The updated regression equations will also be included in the fifth version of the Maryland Hydrology Panel report entitled “Application of Hydrologic Methods in Maryland” that will be published in 2020.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
