A modified hydrodynamic model for routing unsteady flow in a river having piedmont zone
Existence of piedmont zone in a river bed is a critical parameter from among numerous variations of topographical, geological and geographical conditions that can significantly influence the river flow scenario. Downstream flow situation assessed by routing of upstream hydrograph may yield higher fl...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Sciendo
2017-03-01
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| Series: | Journal of Hydrology and Hydromechanics |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/johh-2016-0052 |
| _version_ | 1818335963298922496 |
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| author | Patowary Sudarshan Sarma Arup Kumar |
| author_facet | Patowary Sudarshan Sarma Arup Kumar |
| author_sort | Patowary Sudarshan |
| collection | DOAJ |
| description | Existence of piedmont zone in a river bed is a critical parameter from among numerous variations of topographical, geological and geographical conditions that can significantly influence the river flow scenario. Downstream flow situation assessed by routing of upstream hydrograph may yield higher flow depth if existence of such high infiltration zone is ignored and therefore it is a matter of concern for water resources planning and flood management. This work proposes a novel modified hydrodynamic model that has the potential to accurately determine the flow scenario in presence of piedmont zone. The model has been developed using unsteady free surface flow equations, coupled with Green-Ampt infiltration equation as governing equation. For solution of the governing equations Beam and Warming implicit finite difference scheme has been used. The proposed model was first validated from the field data of Trout Creek River showing excellent agreement. The validated model was then applied to a hypothetical river reach commensurate with the size of major tributaries of Brahmaputra Basin of India. Results indicated a 10% and 14% difference in the maximum value of discharge and depth hydrograph in presence and absence of piedmont zone respectively. Overall this model was successfully used to accurately predict the effect of piedmont zone on the unsteady flow in a river. |
| first_indexed | 2024-12-13T14:31:46Z |
| format | Article |
| id | doaj.art-9fd1117c572e40e1b9b6ed38e7bad72a |
| institution | Directory Open Access Journal |
| issn | 0042-790X |
| language | English |
| last_indexed | 2024-12-13T14:31:46Z |
| publishDate | 2017-03-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Journal of Hydrology and Hydromechanics |
| spelling | doaj.art-9fd1117c572e40e1b9b6ed38e7bad72a2022-12-21T23:41:49ZengSciendoJournal of Hydrology and Hydromechanics0042-790X2017-03-01651606710.1515/johh-2016-0052johh-2016-0052A modified hydrodynamic model for routing unsteady flow in a river having piedmont zonePatowary Sudarshan0Sarma Arup Kumar1Dept. of Civil Engineering, Indian Institute of Technology, Guwahati, IndiaDept. of Civil Engineering, Indian Institute of Technology, Guwahati, IndiaExistence of piedmont zone in a river bed is a critical parameter from among numerous variations of topographical, geological and geographical conditions that can significantly influence the river flow scenario. Downstream flow situation assessed by routing of upstream hydrograph may yield higher flow depth if existence of such high infiltration zone is ignored and therefore it is a matter of concern for water resources planning and flood management. This work proposes a novel modified hydrodynamic model that has the potential to accurately determine the flow scenario in presence of piedmont zone. The model has been developed using unsteady free surface flow equations, coupled with Green-Ampt infiltration equation as governing equation. For solution of the governing equations Beam and Warming implicit finite difference scheme has been used. The proposed model was first validated from the field data of Trout Creek River showing excellent agreement. The validated model was then applied to a hypothetical river reach commensurate with the size of major tributaries of Brahmaputra Basin of India. Results indicated a 10% and 14% difference in the maximum value of discharge and depth hydrograph in presence and absence of piedmont zone respectively. Overall this model was successfully used to accurately predict the effect of piedmont zone on the unsteady flow in a river.https://doi.org/10.1515/johh-2016-0052groundwater flownumerical modelingpiedmont zonegreen-ampt. equationsurface water equation |
| spellingShingle | Patowary Sudarshan Sarma Arup Kumar A modified hydrodynamic model for routing unsteady flow in a river having piedmont zone Journal of Hydrology and Hydromechanics groundwater flow numerical modeling piedmont zone green-ampt. equation surface water equation |
| title | A modified hydrodynamic model for routing unsteady flow in a river having piedmont zone |
| title_full | A modified hydrodynamic model for routing unsteady flow in a river having piedmont zone |
| title_fullStr | A modified hydrodynamic model for routing unsteady flow in a river having piedmont zone |
| title_full_unstemmed | A modified hydrodynamic model for routing unsteady flow in a river having piedmont zone |
| title_short | A modified hydrodynamic model for routing unsteady flow in a river having piedmont zone |
| title_sort | modified hydrodynamic model for routing unsteady flow in a river having piedmont zone |
| topic | groundwater flow numerical modeling piedmont zone green-ampt. equation surface water equation |
| url | https://doi.org/10.1515/johh-2016-0052 |
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