Estimation of Subsurface Flow of Hillslopes Using of Nash and SCS Models

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Fariborzi Hossein; SABZEVARI TOURAJ; Mohammad pour Reza

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Journal Paper

Paper Information

Journal: JOURNAL OF WATER RESOURCES ENGINEERING Year:2021 | Volume:14 | Issue:50 Page(s): 17-30

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Title

Estimation of Subsurface Flow of Hillslopes Using of Nash and SCS Models

Author(s)

Fariborzi Hossein | SABZEVARI TOURAJ | Mohammad pour Reza | Issue Writer Certificate

Keywords

Subsurface flow

Nash

SCS

hillslope

Abstract

Introduction: Subsurface flow estimation (SUF) is important in many catchments with suitable vegetation and high soil permeability and plays an essential role in the production of direct runoff in the basin. The concept of SUF in soil is even more complex compared to surface flow, so the presentation of SUF prediction models of basins with simple and practical methods is important. Methods: In this study, SCS and Nash surface runoff precipitation models were used to estimate the subsurface flow of the catchment hillslopes. From the unit hydrograph equations of the two models, which are a function of the subsurface travel time and the amount of penetration, equations were presented to calculate the actual subsurface travel time of the hillslopes for the use of the models. Findings: For verification of the results, the laboratory rain model with the ability to measure the flow rate of surface and subsurface hillslopes was used. The average error of SCS model compared to the laboratory model in estimating surface runoff peak is 7. 8% and in estimating subsurface flow is 6. 7% and the average error of Nash model in estimating runoff peak is equal to 11. 21% and in estimating subsurface flow is 11. 32%. The effect of slope and hydraulic conductivity of hillslopes on SUF hydrograph was also evaluated by two models.

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APA: Copy

Fariborzi, Hossein, SABZEVARI, TOURAJ, & Mohammad pour, Reza. (2021). Estimation of Subsurface Flow of Hillslopes Using of Nash and SCS Models. WATER ENGINEERING, 14(50 ), 17-30. SID. https://sid.ir/paper/1001076/en

Vancouver: Copy

Fariborzi Hossein, SABZEVARI TOURAJ, Mohammad pour Reza. Estimation of Subsurface Flow of Hillslopes Using of Nash and SCS Models. WATER ENGINEERING[Internet]. 2021;14(50 ):17-30. Available from: https://sid.ir/paper/1001076/en

IEEE: Copy

Hossein Fariborzi, TOURAJ SABZEVARI, and Reza Mohammad pour, “Estimation of Subsurface Flow of Hillslopes Using of Nash and SCS Models,” WATER ENGINEERING, vol. 14, no. 50 , pp. 17–30, 2021, [Online]. Available: https://sid.ir/paper/1001076/en

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