Document Type : Research Paper


1 Ph.D. Student of Watershed Management, Science and Research Branch, Islamic Azad University, Tehran, I.R.IRAN

2 Professor, Faculty of Natural Resources, University of Tehran, I.R.IRAN

3 ; Professor, Faculty of Natural Resources, University of Tehran, I.R.IRAN

4 Professor, Faculty of Agriculture, Isfahan University of Technology, I.R.IRAN


Quantification of urban hydrologic response of catchments to rain fall is one of the most important
issues in urban hydrology. Despite its importance, there is scant information by means of which
required data can be obtained for quantifying hydrologic response. In this study, urban database was
developed for a part of Baharestan City in Isfahan Province and using the information, the urban
unit hydrograph was determined through URBS-UH model for two catchments of Baharestan. Peak
of hydrograph of the first and second catchment was estimated 0.0727m3/s and 0.096, respectively.
Flood hydrograph of some rain occurred previously in Baharestan was determined through the unit
hydrograph. Peak discharge of flood was also measured and the efficiency of the developed model
was examined based on the peak information. Nash–Sutcliffe coefficient of the first and the second
catchment were estimated 0.89 and 0.79, respectively. The developed model showed good to very
good performance in the pilot area.