Regression Equations for Estimating Flood Discharges for the Western Coastal Plain Region of Maryland

Details

• Creators:
  Thomas Jr, Wilbert O ; Sanchez-Claros, Windsor
• Corporate Creators:
  Michael Baker International
• Corporate Contributors:
  Maryland. Department of Transportation. State Highway Administration ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Bridge design
  • Coasts
  • Culverts
  • Floods
  • Frequency distributions
• Publication/ Report Number:
  MD-20-SP910B4G-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Maryland ; United States
• Edition:
  SPR-B Final Report (December 2018-November 2019)
• Corporate Publisher:
  Maryland Department of Transportation. State Highway Administration
• 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:
  PDF
• Funding:
  SP910B4G
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/63067/dot_63067_DS1.pdf
• File Type:
  [PDF - 2.43 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:db4ba38a75fbb0b6d9d552cbf5346e664ed2d5644f372d290a9fe7f08c26c579