Drainage Area Limitations of Single Watershed, Peak Flow Estimates from NRCS Methods

Maughan, Timothy A; Hotchkiss, Rollin H.; Hales, Riley

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Drainage Area Limitations of Single Watershed, Peak Flow Estimates from NRCS Methods

2025-05-01
By Maughan, Timothy A ; Hotchkiss, Rollin H. ; Hales, Riley

File Language:

English

Details

Creators:

Maughan, Timothy A ; Hotchkiss, Rollin H. ; Hales, Riley
Corporate Creators:

Brigham Young University. Department of Civil and Construction Engineering
Corporate Contributors:

Nebraska. Department of Transportation
Subject/TRT Terms:
- Drainage
- Highways
- Rainfall
- Runoff
- Watersheds
Publication/ Report Number:

FY24(033)
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report May 2023 – May 2025
Corporate Publisher:

Nebraska. Department of Transportation
Abstract:

Most state Department of Transportation roadway design sections predict peak flow for culvert design using, amongst other approaches, Natural Resources Conservation Service (NRCS) TR-20 technology. Even though this technology is more than 50 years old, there are no clear guidelines for how large a single watershed drainage area may be while remaining appropriate for predicting peak discharge with this method. Our objective was to identify the drainage area where TR-20 peak flow predictions significantly deviate from flow frequency predictions.
Format:

PDF
Funding:

FY24(033)
Download URL:

https://rosap.ntl.bts.gov/view/dot/84549/dot_84549_DS1.pdf
File Type:

[PDF - 1.92 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:57b39e2ed45aee96fc6515493ff128951e2915457ea13f8730d7ae8d83e1c464b3a0df351d11a4fc74e528ab3d6d366d62a8ae08fb2eb529c429153a19ab5743

File Language:

English

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