Flow modelling and determination of sub-watersheds contribution in flood Hydrograph in Amoughin watershed, Ardabil province
The focus of watershed management practices should be in the runoff control, flood prediction and determination of sub-watersheds contribution in producing flood with the aim of reduction its destructive losses. Proposing of practical management solutions of flood control needs the examining of rain...
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University of Sistan and Baluchestan
2018-12-01
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| Series: | مخاطرات محیط طبیعی |
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| Online Access: | https://jneh.usb.ac.ir/article_3490_ab5381b25e8f867e173902b373705b22.pdf |
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| author | Shahnaz Mirzaei Abazar Esmali Raoof Mostafazadeh Ardavan Ghorbani Sajjad Mirzaei |
| author_facet | Shahnaz Mirzaei Abazar Esmali Raoof Mostafazadeh Ardavan Ghorbani Sajjad Mirzaei |
| author_sort | Shahnaz Mirzaei |
| collection | DOAJ |
| description | The focus of watershed management practices should be in the runoff control, flood prediction and determination of sub-watersheds contribution in producing flood with the aim of reduction its destructive losses. Proposing of practical management solutions of flood control needs the examining of rainfall-runoff models to simulate flow hydrograph, especially in ungauged watersheds. The aim of this study was to evaluate the effectiveness of HEC-HMS model in the rainfall-runoff simulation of Amoughin watershed and determination of sub-watersheds contribution in outlet flow hydrograph. Toward this attempt, the HEC-HMS model was run with SCS-CN method (loss module), SCS-Unit hydrograph method (rainfall-runoff transformation) and Muskingum method (flood routing) through 9 rainfall-runoff events. The input parameters of the model were optimized through applying 6 storm events considering Nash-Sutcliffe objective function and the mean values of the input parameters were used as input for three excluded storm events during the validation stage. In order to prioritize the potential flooding of sub-watersheds, the calibrated HEC-HMS model was employed by removing the sub-watersheds in each run with the 25-year design rainfall, then the flooding potential indices calculated. According to the results, the average value of Nash-Sutcliffe statistical criterion 0.63 in the validation stage demonstrates that the accuracy of HEC-HMS model in flood simulations of Amoughin watershed. The result of flooding potential indices showed that B1, B2, and B3 sub-watersheds have more effect on the flooding potential of Amoughin watershed. In conclusion, it can be said that flooding potential sub-watersheds are not affected only by sub-watersheds area. While, the physiographic characteristics, land use related factors, spatial location and flow routing through sub-watershed to outlet should be considered in determining the flooding potential of sub-watersheds in future studies. |
| first_indexed | 2024-03-13T05:48:56Z |
| format | Article |
| id | doaj.art-7e31e6657e474d4fa14685f88db9b077 |
| institution | Directory Open Access Journal |
| issn | 2676-4377 2676-4385 |
| language | fas |
| last_indexed | 2024-03-13T05:48:56Z |
| publishDate | 2018-12-01 |
| publisher | University of Sistan and Baluchestan |
| record_format | Article |
| series | مخاطرات محیط طبیعی |
| spelling | doaj.art-7e31e6657e474d4fa14685f88db9b0772023-06-13T19:53:46ZfasUniversity of Sistan and Baluchestanمخاطرات محیط طبیعی2676-43772676-43852018-12-017188910810.22111/jneh.2017.20252.12523490Flow modelling and determination of sub-watersheds contribution in flood Hydrograph in Amoughin watershed, Ardabil provinceShahnaz Mirzaei0Abazar Esmali1Raoof Mostafazadeh2Ardavan Ghorbani3Sajjad Mirzaei4M.Sc. student of Watershed Managment Engineering, University of Mohaghegh ArdabiliAssociate Professor, Department of Natural Resources, University of Mohaghegh Ardabili, ArdabilAssistant Professor, University f Mohaghegh ArdabiliAssociate Professor, Department of Natural Resources, University of Mohaghegh ArdabiliPh.D Student of Watershed ‎Management Science and Engineering, Tarbiat Modares UniversityThe focus of watershed management practices should be in the runoff control, flood prediction and determination of sub-watersheds contribution in producing flood with the aim of reduction its destructive losses. Proposing of practical management solutions of flood control needs the examining of rainfall-runoff models to simulate flow hydrograph, especially in ungauged watersheds. The aim of this study was to evaluate the effectiveness of HEC-HMS model in the rainfall-runoff simulation of Amoughin watershed and determination of sub-watersheds contribution in outlet flow hydrograph. Toward this attempt, the HEC-HMS model was run with SCS-CN method (loss module), SCS-Unit hydrograph method (rainfall-runoff transformation) and Muskingum method (flood routing) through 9 rainfall-runoff events. The input parameters of the model were optimized through applying 6 storm events considering Nash-Sutcliffe objective function and the mean values of the input parameters were used as input for three excluded storm events during the validation stage. In order to prioritize the potential flooding of sub-watersheds, the calibrated HEC-HMS model was employed by removing the sub-watersheds in each run with the 25-year design rainfall, then the flooding potential indices calculated. According to the results, the average value of Nash-Sutcliffe statistical criterion 0.63 in the validation stage demonstrates that the accuracy of HEC-HMS model in flood simulations of Amoughin watershed. The result of flooding potential indices showed that B1, B2, and B3 sub-watersheds have more effect on the flooding potential of Amoughin watershed. In conclusion, it can be said that flooding potential sub-watersheds are not affected only by sub-watersheds area. While, the physiographic characteristics, land use related factors, spatial location and flow routing through sub-watershed to outlet should be considered in determining the flooding potential of sub-watersheds in future studies.https://jneh.usb.ac.ir/article_3490_ab5381b25e8f867e173902b373705b22.pdfrainfall-runoff simulationprioritizeflooding potentialamoughin watershed |
| spellingShingle | Shahnaz Mirzaei Abazar Esmali Raoof Mostafazadeh Ardavan Ghorbani Sajjad Mirzaei Flow modelling and determination of sub-watersheds contribution in flood Hydrograph in Amoughin watershed, Ardabil province مخاطرات محیط طبیعی rainfall-runoff simulation prioritize flooding potential amoughin watershed |
| title | Flow modelling and determination of sub-watersheds contribution in flood Hydrograph in Amoughin watershed, Ardabil province |
| title_full | Flow modelling and determination of sub-watersheds contribution in flood Hydrograph in Amoughin watershed, Ardabil province |
| title_fullStr | Flow modelling and determination of sub-watersheds contribution in flood Hydrograph in Amoughin watershed, Ardabil province |
| title_full_unstemmed | Flow modelling and determination of sub-watersheds contribution in flood Hydrograph in Amoughin watershed, Ardabil province |
| title_short | Flow modelling and determination of sub-watersheds contribution in flood Hydrograph in Amoughin watershed, Ardabil province |
| title_sort | flow modelling and determination of sub watersheds contribution in flood hydrograph in amoughin watershed ardabil province |
| topic | rainfall-runoff simulation prioritize flooding potential amoughin watershed |
| url | https://jneh.usb.ac.ir/article_3490_ab5381b25e8f867e173902b373705b22.pdf |
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