Assessment of storm direct runoff and peak flow rates using improved SCS-CN models for selected forested watersheds in the Southeastern United States

Andrzej Wałęga , Devendra M. Amatya , Peter Caldwell , Dan Marion , Sudhanshu Panda

Abstract

The objective was to evaluate the ability of two modified SCS-CN models to predict direct runoff (DRO) and peak discharge rate (Qp) for selected storm events in three forested watersheds in the region - one low-gradient system in South Carolina, two high-gradient upland systems in North Carolina, and a mid-gradient upland system in Arkansas. New hydrological insights for the region: The calculated peak discharge rate Qp values by all methods were unsatisfactory when using the default pond and swamp adjustment factor (Fp) value of 0.72 recommended in the SCS TR55 guideline, indicating that use of the default Fp value may result in erroneous Qp estimates for forest watersheds with high retention capacities. These findings, indicating the superiority of the modified Sahu-Mishra-Eldo (SME_m) method to the original SCS method in runoff calculations and substantially lower Fp values in the associated Qp method, are significant for hydrologists and engineers who frequently apply the methods in design of storm water management structures including road culverts on forested landscapes.
Author Andrzej Wałęga (FoEEaLS / DoSEaWM)
Andrzej Wałęga,,
- Department of Sanitary Engineering and Water Management
, Devendra M. Amatya
Devendra M. Amatya,,
-
, Peter Caldwell
Peter Caldwell,,
-
, Dan Marion
Dan Marion,,
-
, Sudhanshu Panda
Sudhanshu Panda,,
-
Journal seriesJournal of Hydrology: Regional Studies, [Journal of Hydrology: Regional Studies], ISSN 2214-5818, e-ISSN 2214-5818, (N/A 100 pkt)
Issue year2020
Vol27
Pages1-18
Publication size in sheets0.85
Article number100645
Keywords in EnglishAntecedent moisture condition, Fp factor SME_m method, TR 55 procedure
ASJC Classification1901 Earth and Planetary Sciences (miscellaneous); 2312 Water Science and Technology
DOIDOI:10.1016/j.ejrh.2019.100645
URL https://www.sciencedirect.com/science/article/pii/S2214581819302216/pdfft?md5=24a9472dc57db69d8b2e667d71e9e83f&pid=1-s2.0-S2214581819302216-main.pdf
Languageen angielski
LicenseJournal (articles only); author's original; Uznanie Autorstwa - Użycie Niekomercyjne - Bez utworów zależnych (CC-BY-NC-ND); after publication
File
Assessment of storm direct runoff and peak flow rates using improved SCS-CN models for selected forested watersheds in the Southeastern United States of 20-12-2019
4,75 MB
Score (nominal)100
Score sourcejournalList
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.639
Citation count*
Cite
Share Share

Get link to the record


* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back
Confirmation
Are you sure?