Comparison of GIUH model hydrograph simulation results for winter precipitation with spring precipitation and evaluation of GIUH model efficiency

Document Type : Research Article

Authors

• Iraj Jabbari ¹
• MASOUMEH ASADI ²
• Hoamyoun Hesadi ³

¹ Geography Dep. , Letrature Faculty, Razi University, Kermanshah

² faculty member of the Department of Social Sciences (Geography), Payame Noor University, Tehran, Iran

³ Kermanshah Agriculture and Natural Resources Research Center

10.22067/geoeh.2022.73551.1132

Abstract

Floods are occurring as an environmental hazard in many parts of the world, especially in countries that have been ineffective in crisis management and resource conservation. This natural hazard has become one of the most damaging natural disasters since the reckless activities of human beings in exploiting the natural environment have increased. Due to the importance of this issue, in the present study, the results of instantaneous geomorphological unit hydrograph (GIUH) model in predicting floods in winter and spring in Minab catchment (Brentin) have been compared. The research data include the maximum hourly flow and their corresponding precipitation for three spring events and three winter events. The method is that first the required parameters of GIUH model including branching ratio, length ratio and area ratio for the study basin were estimated. The events were compared. The results of this comparison indicate that the GIUH model predicts peak discharge and peak flood time occurring in winter (with average values of 20.09 and 45.64%, respectively) in that it is less distant from the observed data. , Has a higher accuracy than spring events (with average values of 57.3 and 119.7, respectively).
Floods are occurring as an environmental hazard in many parts of the world, especially in countries that have been ineffective in crisis management and resource conservation. This natural hazard has become one of the most damaging natural disasters since the reckless activities of human beings in exploiting the natural environment have increased. Due to the importance of this issue, in the present study

Keywords

• Hydrograph
• Geomophology
• Season
• Flood
• GIUH

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