University of Oulu

Ardekani, A.A., Sabzevari, T., Haghighi, A.T. et al. Separation of surface flow from subsurface flow in catchments using runoff coefficient. Acta Geophys. 69, 2363–2376 (2021).

Separation of surface flow from subsurface flow in catchments using runoff coefficient

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Author: Ardekani, A. Afshar1; Sabzevari, T.1; Torabi Haghighi, A.2;
Organizations: 1Department of Civil Engineering, Islamic Azad University, Estahban Branch, Fars, Iran
2Water, Energy and Environmental Engineering Research Unit, University of Oulu, Oulu, Finland
3Department of Economics, Engineering, Society and Business Organization (DEIM), Tuscia University, Via S. Camillo de Lellis snc, 01100, Viterbo, VT, Italy
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.7 MB)
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Language: English
Published: Springer Nature, 2021
Publish Date: 2022-09-17


Separating surface flow (SF) from subsurface flow (SSF) based on direct runoff measurements in river gauges is an important issue in hydrology. In this study, we developed a simple and practical method, based on runoff coefficient (RC), for separating SF from SSF. RC depends mainly on soil texture, land use and land cover, but we also considered the effect of slope and rainfall intensity. We assessed our RC-based method for three different soil types by comparing the value obtained with laboratory rainfall simulator data. The correlation coefficient between observed and calculated data exceeded 0.93 and 0.63 when estimating SF and SSF, respectively. The method was then used to separate SF and SSF in two catchments (Heng-Chi and San-Hsia) in Northern Taiwan, and the results were compared with those produced by the geomorphological instantaneous unit hydrograph (GIUH) model. Test revealed that, if RC is calculated accurately, the proposed method can satisfactorily separate SF from SSF at catchment scale.

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Series: Acta geophysica
ISSN: 1895-6572
ISSN-E: 1895-7455
ISSN-L: 1895-6572
Volume: 69
Pages: 2363 - 2376
DOI: 10.1007/s11600-021-00667-6
Type of Publication: A1 Journal article – refereed
Field of Science: 1171 Geosciences
Copyright information: © Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences 2021.