Advanced Modeling in Civil Engineering
Simulation of the precipitation-runoff process using the HEC-HMS model and the use of geographic information systems (Case study: Nooreh Basin, Kurdistan Province)
Document Type : Original Article
Authors
1 M.Sc. student, Department of Civil Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Kurdistan Iran.
2 Assistant Professor, Department of Civil Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Kurdistan, Iran.
3 Assistant Professor, Department of Civil Engineering, Bij.C., Islamic Azad University, Bijar, Iran.
4 Phd. student, Department of Civil Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Kurdistan, Iran.
Abstract
Flooding is one of the most destructive natural disasters, causing significant damage to infrastructure, the environment, and human communities each year. The dry and semi-arid climate of Iran, along with the uneven distribution of precipitation, exacerbates the occurrence of flood flows, making optimal management of this phenomenon essentials. In this study, the HEC-HMS model was employed to simulate the rainfall-runoff process in the Noreh Basin (Koh-e-Abidar, Sanandaj). Precipitation data and basin characteristics were processed using a Geographic Information System (GIS) and used as inputs to the model.The results showed that combining the HEC-HMS model with GIS increased the accuracy of estimating hydrological parameters, such as the curve number (CN) and time of concentration, while reducing the modeling time. Peak discharge estimates for different return periods (2 to 100 years) indicated that the maximum discharge produced in this basin ranged from 2.63 to 19.93 cubic meters per second. Furthermore, comparison of the HEC-HMS model results with the empirical Dikken method showed that the HEC-HMS model is more accurate. Finally, the analysis of the capacity of existing hydraulic structures in the region revealed that some of these structures are not effective when confronted with the designed peak discharges. This study can provide valuable information for flood risk management and the design of water structures in the Noreh Basin, and contribute to improving hydrological planning in similar areas.
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