Improvement of Estimation of Flood Hydrograph Using Modified Curve Number (non-linear Ia-S) Model

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Daei Sanaz; Salari Jazi Meysam; GHORBANI KHALIL; Meftah Halaghi Mahdi

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Journal: IRANIAN JOURNAL OF ECOHYDROLOGY Year:2018 | Volume:5 | Issue:3 Page(s): 931-939

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Title

Improvement of Estimation of Flood Hydrograph Using Modified Curve Number (non-linear Ia-S) Model

Author(s)

Daei Sanaz | Salari Jazi Meysam | GHORBANI KHALIL | Meftah Halaghi Mahdi | Issue Writer Certificate

Keywords

FloodQ1

HydrographQ2

Modified Curve Number (nonQ2

linear IaQ2

S)Q2

curve number (SCSQ2

CN)Q2

Abstract

The Curve Number Model (SCS-CN) is in conventional mode is based on the linear relationship between initial absorption (Ia) and potential maximum retention (S) of the catchment but this model has been modified to consider non-linear Ia-S relation. The objective of this study is to compare the conventional curve number and modified curve number (non-linear Ia-S relation) models in Flood Hydrograph estimation in five Galikesh, Nodeh, Tamer, Vatana and Kechik catchments (37 rainfall-runoff events in calculation and selection of 14 events for results comparison in validation step). The root mean square error (RMSE), Nash-Sutcliff (NSE) and peak discharge estimation error (PEP) criteria were used for results comparison. Investigation of RMSE and NSE and PEP criteria shows that the application of modified curved number model (non-linear Ia-S) in all events of validation step improves the estimations of Flood Hydrograph and peak discharge in comparison with conventional curve number model (SCS-CN), therefore the results indicated that in studied catchments, the modified curve number model (non-linear Ia-S) has improved the conventional curve number SCS-CN model.

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APA: Copy

Daei, Sanaz, Salari Jazi, Meysam, GHORBANI, KHALIL, & Meftah Halaghi, Mahdi. (2018). Improvement of Estimation of Flood Hydrograph Using Modified Curve Number (non-linear Ia-S) Model. IRANIAN JOURNAL OF ECOHYDROLOGY, 5(3 ), 931-939. SID. https://sid.ir/paper/254005/en

Vancouver: Copy

Daei Sanaz, Salari Jazi Meysam, GHORBANI KHALIL, Meftah Halaghi Mahdi. Improvement of Estimation of Flood Hydrograph Using Modified Curve Number (non-linear Ia-S) Model. IRANIAN JOURNAL OF ECOHYDROLOGY[Internet]. 2018;5(3 ):931-939. Available from: https://sid.ir/paper/254005/en

IEEE: Copy

Sanaz Daei, Meysam Salari Jazi, KHALIL GHORBANI, and Mahdi Meftah Halaghi, “ Improvement of Estimation of Flood Hydrograph Using Modified Curve Number (non-linear Ia-S) Model,” IRANIAN JOURNAL OF ECOHYDROLOGY, vol. 5, no. 3 , pp. 931–939, 2018, [Online]. Available: https://sid.ir/paper/254005/en

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