Scrutiny of base flow separation using natural monthly discharge

Document Type : Research Article

Authors

1 Dezab Consulting Engineer, Ahvaz, Iran

2 PhD Student of Water Resources Engineering, Faculty of Water Sciences Engineering Shahid Chamran University, Ahvaz, Iran

3 Assistant Professor, Faculty of New Sciences and Technologies, University of Tehran

Abstract

In hydrology studies, the river regimes are considered to be natural while this assumption is not correct since the river water is used for developing agriculture, industry, and other needs, particularly in the middle basins. The requirement for river base flow separation is to have access to natural river regime on a daily basis, which, regarding the limitations of naturalization, natural river regime can be calculated on an annual or monthly basis. Therefore, the estimation of base flow has been faced with some difficulties. On the other side, due to the complex relation of surface water with groundwater, the estimation of base flow is too hard. Therefore, in this study, the removal process method was used for naturalizing monthly discharge of Belbar basin, and Eckhart RDF algorithm was used since it takes aquifer characteristics into account for calculating base flow and it has the ability to optimize its parameters. The constant parameters of return and the maximum base flow index for monthly natural river discharge in hydrometric stations of Belbar dam were optimized. Then, the monthly base flow was calculated and the results showed that the monthly natural river discharge can be used like the daily natural river discharge with the same accuracy.

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References

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Iranian journal of Ecohydrology
Volume 4, Issue 3
September 2017
Pages 911-921

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History

  • Receive Date: 15 March 2017
  • Revise Date: 23 May 2017
  • Accept Date: 10 June 2017
  • First Publish Date: 23 September 2017
  • Publish Date: 23 September 2017

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