Scrutiny of base flow separation using natural monthly discharge

Document Type : Research Article


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


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.


Main Subjects




    1. Bayazidi S, Aliabad HM, Zafaranizade M. Natural discharge of hydrometric stations with Cindex (remove Trend amended), the Ninth International Conference of Civil Engineering, University of Isfahan; 2012 [Persian]
    2. White KE, Sloto RA. Base-flow frequency characteristics of selected Pennsylvania Streams. US Department of the Interior, US Geological Survey; 1990.
    3. Holtschlag DJ, Nicholas JR. Indirect ground-water discharge to the Great Lakes. US Geological Survey; 1998.
    4. Hoos AB. Recharge rates and aquifer hydraulic characteristics for selected drainage basins in middle and east Tennessee. US Geological Survey; Books and Open-File Reports [distributor]; 1990.
    5. Rutledge AT. Computer programs for describing the recession of ground-water discharge and for estimating mean ground-water recharge and discharge from streamflow records: Update;1998.
    6. Mau DP, Winter TC. Estimating Ground‐Water Recharge from Streamflow Hydrographs for a Small Mountain Watershed in a Temperate Humid Climate, New Hampshire, USA. Ground Water. 1997 Mar. 1;35(2):291-304.
    7. Chapman TG. Comment on “Evaluation of automated techniques for base flow and recession analyses” by RJ Nathan and TA McMahon. Water Resources Research. 1991 Jul. 1;27(7):1783-4.
    8. Nathan RJ, McMahon TA. Evaluation of automated techniques for base flow and recession analyses. Water Resources Research. 1990 Jul. 1;26(7):1465-73.
    9. Lyne V, Hollick M. Stochastic time-variable rainfall-runoff modelling. InInstitute of Engineers Australia National Conference 1979 Sep. (Vol. 1979, pp. 89-93).
    10. Eckhardt K. How to construct recursive digital filters for baseflow separation. Hydrological processes. 2005 Feb. 15;19(2):507-15.
    11. Eckhardt K. A comparison of baseflow indices, which were calculated with seven different baseflow separation methods. Journal of Hydrology. 2008 Apr. 30;352(1):168-73.
    12. Gonzales AL, Nonner J, Heijkers J, Uhlenbrook S. Comparison of different base flow separation methods in a lowland catchment. Hydrology and Earth System Sciences. 2009 Nov. 4;13(11):2055-68.
    13. Smakhtin VU. Estimating continuous monthly baseflow time series and their possible applications in the context of the ecological reserve. Water Sa. 2001 Apr 1;27(2):213-7.
    14. Shoshtari MM. Hydraulic groundwater, Ahvaz:Shahid Chamran UniversityPress; 2010 [Persian]
    15. Beard L. R. HEC-4 Monthly Streamflow Simulation.1971.
Volume 4, Issue 3
September 2017
Pages 911-921
  • Receive Date: 15 March 2017
  • Revise Date: 23 May 2017
  • Accept Date: 10 June 2017
  • First Publish Date: 23 September 2017