Ardekani, A.A., Sabzevari, T., Haghighi, A.T. et al. Separation of surface flow from subsurface flow in catchments using runoff coefficient. Acta Geophys. (2021). https://doi.org/10.1007/s11600-021-00667-6
Separation of surface flow from subsurface flow in catchments using runoff coefficient
|Author:||Ardekani, A. Afshar1; Sabzevari, T.1; Torabi Haghighi, A.2;|
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
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2021092346960
|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.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
© Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences 2021.