Two Dimensional Hydraulic Modeling of Karun River
Hydrodynamic models proposed for simulating flow hydraulic in rivers assume the flow in one direction and simulate the hydraulic parameters based on the one-dimensional Saint-Venant equations. In this research, a two-dimensional HEC-RAS model was used to simulate the flow in the Karun River, between...
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| Format: | Article |
| Language: | fas |
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Isfahan University of Technology
2019-12-01
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| Series: | علوم آب و خاک |
| Subjects: | |
| Online Access: | http://jstnar.iut.ac.ir/article-1-3755-en.html |
| _version_ | 1798028559391916032 |
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| author | J. Zahiri M. Ashnavar |
| author_facet | J. Zahiri M. Ashnavar |
| author_sort | J. Zahiri |
| collection | DOAJ |
| description | Hydrodynamic models proposed for simulating flow hydraulic in rivers assume the flow in one direction and simulate the hydraulic parameters based on the one-dimensional Saint-Venant equations. In this research, a two-dimensional HEC-RAS model was used to simulate the flow in the Karun River, between Mollasani and Farsiat stations. Geographic information system (GIS) and river cross sections were used to prepare the altitude map using the satellite image of the study area. Modeling results in river bends showed that the maximum velocity occurred in the outer bend, which coincided with the flow mechanism in the bends. Based on the results, grid type and density have little effect on flow depth modeling. However, the characteristics of the mesh used had a great influence on the velocity distribution, so that the regular high-density mesh had the best accuracy in simulating the flow velocity. Statistical analysis showed that the RMSE for the flow discharge and flow depth were 17.95 m3/s and 0.05 m, respectively. In addition, the Nash–Sutcliffe efficiency index was calculated to be above 0.9 for the discharge and flow depth, which could be considered as a desirable value. |
| first_indexed | 2024-04-11T19:10:13Z |
| format | Article |
| id | doaj.art-d7170af80352432e9b75cc0e6f4eeeed |
| institution | Directory Open Access Journal |
| issn | 2476-3594 2476-5554 |
| language | fas |
| last_indexed | 2024-04-11T19:10:13Z |
| publishDate | 2019-12-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | علوم آب و خاک |
| spelling | doaj.art-d7170af80352432e9b75cc0e6f4eeeed2022-12-22T04:07:39ZfasIsfahan University of Technologyعلوم آب و خاک2476-35942476-55542019-12-01234331344Two Dimensional Hydraulic Modeling of Karun RiverJ. Zahiri0M. Ashnavar1 1. Department of Water Engineering, Agricultural Sciences and Natural Resources University of Khuzestan, Iran. 1. Department of Water Engineering, Agricultural Sciences and Natural Resources University of Khuzestan, Iran. Hydrodynamic models proposed for simulating flow hydraulic in rivers assume the flow in one direction and simulate the hydraulic parameters based on the one-dimensional Saint-Venant equations. In this research, a two-dimensional HEC-RAS model was used to simulate the flow in the Karun River, between Mollasani and Farsiat stations. Geographic information system (GIS) and river cross sections were used to prepare the altitude map using the satellite image of the study area. Modeling results in river bends showed that the maximum velocity occurred in the outer bend, which coincided with the flow mechanism in the bends. Based on the results, grid type and density have little effect on flow depth modeling. However, the characteristics of the mesh used had a great influence on the velocity distribution, so that the regular high-density mesh had the best accuracy in simulating the flow velocity. Statistical analysis showed that the RMSE for the flow discharge and flow depth were 17.95 m3/s and 0.05 m, respectively. In addition, the Nash–Sutcliffe efficiency index was calculated to be above 0.9 for the discharge and flow depth, which could be considered as a desirable value.http://jstnar.iut.ac.ir/article-1-3755-en.htmlhec-ras modelgismesh gridriver bend |
| spellingShingle | J. Zahiri M. Ashnavar Two Dimensional Hydraulic Modeling of Karun River علوم آب و خاک hec-ras model gis mesh grid river bend |
| title | Two Dimensional Hydraulic Modeling of Karun River |
| title_full | Two Dimensional Hydraulic Modeling of Karun River |
| title_fullStr | Two Dimensional Hydraulic Modeling of Karun River |
| title_full_unstemmed | Two Dimensional Hydraulic Modeling of Karun River |
| title_short | Two Dimensional Hydraulic Modeling of Karun River |
| title_sort | two dimensional hydraulic modeling of karun river |
| topic | hec-ras model gis mesh grid river bend |
| url | http://jstnar.iut.ac.ir/article-1-3755-en.html |
| work_keys_str_mv | AT jzahiri twodimensionalhydraulicmodelingofkarunriver AT mashnavar twodimensionalhydraulicmodelingofkarunriver |