Evaluation of flood control nodes of Hamadan drainage network using SWMM model

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Siyooti Sepideh; Ildoromi Alireza; Farrokhzadeh Behnoosh

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Journal Paper

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Journal: HYDROGEOMORPHOLOGY Year:2024 | Volume:11 | Issue:40 Page(s): 164-143

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Information Journal Paper

Title

Evaluation of flood control nodes of Hamadan drainage network using SWMM model

Author(s)

Siyooti Sepideh | Ildoromi Alireza | Farrokhzadeh Behnoosh | Issue Writer Certificate

Keywords

rainfall-runoff modeling

SWMM model

Urban watershed

SCS method

Hamadan city

Abstract

In this research, the flood-blocking nodes of the drainage network in Khako (Faqira-Khidr) urban basin of Hamedan were measured and evaluated using the SWMM model. The results showed that the infiltration and runoff height of the project in the SCS method are equal to 50.86 and 16.14 mm, respectively, and this indicates that the SCS method is a more accurate assessment of the infiltration and runoff values for the Hamadan Urban watershed. and has an acceptable efficiency. The results show that out of the total rainfall of 120 mm, 33 mm is related to infiltration losses and 87 mm is related to surface runoff, and the flow volume is equal to 2.41 million cubic meters, which is 1.98 1 million cubic meters is related to Faqireh sub-basin and 0.43 million cubic meters is related to Khizr sub-basin. According to the efficiency coefficient of NS, which is calculated as 0.66 for the peak discharge and 0.73 for the flood volume, and these numbers are acceptable. The results showed that the highest volume of rainfall runoff of the project with 1.28 million cubic meters is related to Faqirah sub-basin due to the physical development of Hamedan city in recent years in this sub-basin and the lowest amount with 0.46 million cubic meters is related to the sub-basin. It is Khedrkhako. The results of this research showed that residential uses have the largest share in the flood potential of the study area.

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