The Role of Spatial Distribution of Basin Hydrological Units on Flood Peak Flow Changes Using HEC-HMS Hydrological Model (Case Study: Safaarood Basin)

Subject Areas : Applications in water resources management

Morteza Shahedi ¹ , Gholamreza Nabi Bidhendi ²

1 - پژوهشگاه مهندسی بحران طبیعی
2 - Professor, Department of Environmental Engineering, Faculty of Environment, University of Tehran, Tehran, Iran

Received: 2022-01-25 Accepted : 2022-05-06 Published : 2023-09-23

Keywords: Saffaarood basin, flood control, Operation optimization, HEC-HMS model, Watershed Management,

Abstract :

Due to the significant variations in land control, also regional changes, in recent several decades, floodwater management has attained a vital importance, from the view of water sources management. The aim of this recent research is to study the role of local distribution Aquifer laver hydraulic units of Safaarood on floodwater climax, by utilization HEC-HMS Hydraulic Model. In order to obtain such a purpose, at first, local distribution of under of lavers was estimated, through the amount of its occurrences Flood & HEC-HMS hydraulic Model, co scaling surfaces map according to region level. Then, by using the map of occurrences Flood and HEC-HMS hydraulic Model, the behavior of sub of lavers bestead in every co scaling surfaces, according to floodwater designed, and at the end, along centenary recursion course was discussed. Through elimination of effect of mentioned sub lavers on each co scaling levels, hydrography of exiting floodwater was stimulated. The results showed that sub lavers levels 1 & 2, located on Safaarood laver exiting with index of 67% and 78% had the least impact, and instead, sub lavers level 4 with index of 1.10% had the most impact on exiting floodwater climax of laver. The amount of created variabilities in median region and superior regions resulted from the figure of laver, on compilation with occurrences flood severity. According to above mentioned issues, recommended that, in order to reduce administrative costs, centralization of administrative operation of Safaarood laver floodwater management on all of the regions, including median and superior regions should be prioritized.