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

被引：74

作者：

Walega, Andrzej ^{[1
]}

Amatya, Devendra M. ^{[2
]}

Caldwell, Peter ^{[3
]}

Marion, Dan ^{[4
]}

Panda, Sudhanshu ^{[5
]}

机构：

[1] Agr Univ Krakow, Dept Sanit Engn & Water Management, Mickiewicza St 24-28, PL-30059 Krakow, Poland

[2] US Forest Serv, Ctr Forest Watershed Res, Southern Res Stn, USDA, 3734 Highway 402, Cordesville, SC 29434 USA

[3] US Forest Serv, Ctr Forest Watershed Res, Southern Res Stn, USDA, 3160 Coweeta Lab Rd, Otto, NC 28763 USA

[4] US Forest Serv, Southern Hardwoods Lab, USDA, POB 1270, Hot Springs, AR 71902 USA

[5] Univ North Georgia, Inst Environm Spatial Anal, 3820 Mundy Mill Rd, Oakwood, GA 30566 USA

来源：

JOURNAL OF HYDROLOGY-REGIONAL STUDIES | 2020年 / 27卷

关键词：

Antecedent moisture condition; F-p factor; SME_m method; TR; 55; procedure; CURVE-NUMBER; HEADWATER STREAMS; SOUTH-CAROLINA; HYDROLOGY; PARAMETER;

D O I：

10.1016/j.ejrh.2019.100645

中图分类号：

TV21 [水资源调查与水利规划];

学科分类号：

081501 ;

摘要：

Study region: Southeastern United States Study focus: The objective was to evaluate the ability of two modified SCS-CN models to predict direct runoff (DRO) and peak discharge rate (Q(p)) 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 Q(p) values by all methods were unsatisfactory when using the default pond and swamp adjustment factor (F-p) value of 0.72 recommended in the SCS TR55 guideline, indicating that use of the default Fp value may result in erroneous Q(p) 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 F-p values in the associated Q(p) 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.

引用

页数：18

共 75 条

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