Journal of Wetland Ecobiology
Volume 15, Issue 1 (Spring 2023)
2023, 15(1): 64-73 |
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Simulation of erosion and sediment transport in the Karun River using the HEC-RAS model. Wetland Ecobiology 2023; 15 (1) : 5
URL: http://jweb.ahvaz.iau.ir/article-1-1130-en.html
URL: http://jweb.ahvaz.iau.ir/article-1-1130-en.html
Abstract: (219 Views)
Rivers are continuously affected by erosion and sedimentation processes, which cause ongoing morphological changes. Understanding these changes is of great importance for river management and safety purposes. One of the methods for studying and identifying changes resulting from erosion and sedimentation processes under various influencing factors is hydraulic modeling of flow and sediment transport in rivers using mathematical models. In this study, hydraulic simulation of flow and sediment transport in the Karun River (Ahvaz–Farsiat reach) was carried out through calibration and evaluation of the HEC-RAS model. For sediment transport simulation in HEC-RAS, parameters such as the type of sediment transport function, coefficients related to the transport function, and the method of calculating sediment fall velocity were calibrated. For hydraulic flow simulation, Manning’s roughness coefficients of the main channel bed and floodplain were calibrated. The results of calibration and evaluation indicate that the most suitable sediment transport function and fall velocity calculation method for the studied river reach are, respectively, the Larsen equation with a critical Shields parameter of 0.0032 and the Report 12 method. In addition, Manning’s roughness coefficients for the main channel and floodplain were determined to be 0.027 and 0.034, respectively.
Article number: 5
Type of Study: Research |
Subject:
Special
Received: 2026/01/2 | Accepted: 2026/01/17 | Published: 2026/01/17
Received: 2026/01/2 | Accepted: 2026/01/17 | Published: 2026/01/17
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