DBPapers
DOI: 10.5593/SGEM2014/B31/S12.091

THE ANALYSIS OF THE RECESSION HYDROGRAPH’S LIMBS ON THE CHOSEN WATERSHED IN THE CZECH REPUBLIC

T. Frabsova, P. Maca , P. Pech
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 707-714 pp

ABSTRACT
The analysis of the recession hydrograph´s limbs is based on the evaluation of the recession characteristics estimated from the runoff hydrograph on the selected catchment in the Czech Republic. Within this contribution the following constitutional storage discharge relationships of single accumulation space were identified: the linear, the nonlinear and the exponential reservoir. The recession limbs analysis consists of two parts. The first part explores the parameter estimation using the local optimization algorithm based on nonlinear least squares minimization, it was applied for the identification of power relationship of nonlinear reservoir. In the second part of the analysis the parameters of studied constitutive relationships are estimated using global optimization algorithm based on the Shuffled Complex Differential Evolution (SCDE). The main result of calibration is the finding that the baseflow response of basin corresponds more to the response of nonlinear reservoir on tested set of watershed.

Keywords: baseflow, recession limb, constitutional relationship, models of reservoir, optimization algorithm