Investigation of flood risk through SWAT and SIMHYD models in Karganrud Drainage Basin,, Talesh, Iran

Document Type : Research Article

Authors

• Mohammad Hossein Rezaei Moghaddam ¹
• Kosar loghmannia ²
• Sadra karimzadeh ³
• Abdollah Behbodi ⁴

¹ 29th Bahman, Dept. of Geomorphology, University of Tabriz

² 29th Bahman, Dept. Of Geomorphology, University of Tabriz

³ Dept. of RS and GIS University of Tabriz

⁴ Dept. of Geomorphology, University of Tabriz

10.22067/geoeh.2022.76374.1216

Abstract

Today, with the development and expansion of hydrological tools and saving time, cost, and in critical situations in order to take management measures to reduce flood damage, the use of such tools has made it easier to simulate catchments. In the present study, the SWAT model is used as a semi-distributive model and the SIMHYD model is used as an integrated model to estimate the runoff of the Karganrud Talesh catchment. For this purpose, observational data in the period 2006 to 2018 related to Talesh, Astara, Bandar Anzali synoptic stations and Hashtpar hydrometric station have been used. In modeling by SWAT model, the coefficients N2 and R2 as the objective function in the monthly flow calibration stage were 0.61 and 0.62, respectively, and in the validation, stage was 0.67 and 0.70, respectively, indicating acceptable results in runoff peak simulation. And the floods created in this basin. Acceptable results were also obtained in the calibration and validation of the SIMHYD model. So that the coefficients N2 and R2 in the calibration stage were 0.710 and 0.8511, respectively, and in the validation, stage was 0.625 and 0.9496, respectively. However, due to its semi-distributive nature, the SWAT model has a high accuracy in runoff simulation compared to the SIMHYD model, and the outputs obtained from both models show this superiority in flood assessment and estimation. Because this model simulates runoff well in the daily time period, while the SIMHYD model has satisfactory results in this basin by increasing the quality of data in the monthly time period.

Keywords

• Flood
• Karganrud Drainage Basin
• SIMHYD
• SWAT
• Runoff Simulation

Main Subjects

• مخاطرات ژئومورفیک-هیدرولوژیک

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