International Journal of Scientific & Technology Research

Home About Us Scope Editorial Board Blog/Latest News Contact Us
10th percentile
Powered by  Scopus
Scopus coverage:
Nov 2018 to May 2020


IJSTR >> Volume 6 - Issue 7, July 2017 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Comparative Analysis Of Methods Of Baseflow Separation Of Otamiri Catchment

[Full Text]



Nwakpuda Nat. I.



Baseflow separation, Otamiri streamflow, fived interval, Sliding Interval, Local Minimum, Baseflow index, Frequency analysis.



The various approaches of separating baseflow from other streamflow components are hinged on their respective strengths and drawbacks with respect to the watershed considered. Little wonder therefore, that this research work has ventured on some methods amongst multitude of emerged methods, to establish the best method(s) of baseflow separation and henceforth address the strength and drawback dichotomy associated with the different baseflow separation methods. The examined methods of baseflow separation used in this work are conveniently categorized into five basic approaches of fixed interval, sliding interval, local minimum, Baseflow Index and frequency analysis. Data for the analyses obtained from Otamiri River at Nekede were utilized for this study and daily recorded streamflow discharge data obtained from the historical records held at the libraries of the Anambra Imo River Basin Development Authority, Owerri and the Nigerian National Meteorological Services. The results of the predictability of the stream flow from the estimated baseflow for all the methods used conformed as evident in the regression analysis and the results showed that the value of the coefficient of simple determination (r2) was highest in the fixed interval method and least in the frequency analysis method which implies that the fixed interval method was the best method of separating the base flows for Otamiri stream.



[1]. Boussinesq J (1877) Essai sur la theories des eauxcourantes. Memoires presentes par divers savants a l’Academic des Sciences de l’Institut National de France, Tome XXIII, No 1.

[2]. Boussinesq J (1904) Recherchestheoretique sur l’ecoulement des nappes d’eauinfiltreesdans le sloet sur le debit des sources. J. Math. Pure Appl. 10 (5thSeries), 5-78.

[3]. Grayson RB, Argent RM, Nathan RJ, McMahon TA, Mein, RG (1996) Hydrological recipes: estimation techniques in Australian hydrology. CRC for Catchment Hydrology

[4]. Linsley, R. K., Kohler, M. A., and Paulhus, J. L. H. (1975) Hydrology for engineers, McGraw-Hill.

[5]. Linsley RK, Kohler MA, Paulhus JLH, Wallace JS (1958) Hydrology for engineers. McGraw Hill, New York.

[6]. Frohlich K, Frohlich W and Wittenberg H (1994) Determination of groundwater recharge by baseflow separation: regional analysis in northeast China. FRIEND: Flow Regimes from International Experimental and Network Data, Proceedings of Braunschweig Conference, October 1993. IAHS Publ. No 221

[7]. Maillet E (1905) Essaisd ’Hydraulique Souterraineet Fluviale. Hermann Paris, 218pp.

[8]. McDonnell, J. J. and Tanaka, T. (Eds.) (2001) Hydrology and biogeochemistry of forested catchments, Special issue of Hydrological Processes, 15(9).

[9]. Nathan RJ, McMahon TA (1990) Evaluation of automated techniques for base flow and recession analyses. Water Resources Research 26(7), 1465-1473.

[10]. SMAKHTIN VU (2001) Estimating continuous monthly baseflow time series and their possible applications in the context of the ecological reserve. Water SA

[11]. Smakhtin VU (2001) Low flow hydrology: a review. J Hydrology 240, 147-186.

[12]. Szilagyi J, Parlange MB (1998) Baseflow separation based on analytical solutions of the Boussinesq equation. Journal of Hydrology 204:251-260.

[13]. Tallaksen LM (1995) A review of baseflow recession analysis. Journal of Hydrology 165:349-370.