Quantification of Geomorphological Changes of Sefidroud River and Investigation of Their Relationship with Hydraulic Characteristics of Flood Events
Year: 2024
Type: article
Abstract: relationship: as the channel's migration increases, its stability decreases, and vice versa.Flood severity, which is the product of flow velocity and depth, can lead to significant changes in the river channel, meanders, and sediment distribution.The results indicate that, contrary to expectations, in areas with higher flood severity during a 25-year return period, river channel changes are less pronounced.This phenomenon is related to factors such as channel depth and longitudinal slope.Deeper channels, where flood severity is greater, exhibit higher stability and therefore experience fewer changes.In contrast, wider and shallower sections of the river, with slower flow, tend to undergo more substantial alterations. 3-Discussion and ConclusionNumerous studies have been conducted on river morphology changes across various regions worldwide, employing a wide range of methods.In this study, several of these methods were used to quantify and examine the geomorphological changes in the selected study reaches.However, a key aspect of this research is the relationship between flood severity and geomorphological changes in rivers.Most studies in this field have focused on the impact of one or several extreme flood events on river channel changes, typically employing a before-and-after comparative approach.However, this research utilizes hydraulic modeling, based on validated 1:1000 maps and hydrometric data, to comprehensively examine the overall effect of flood severity on river morphology and channel changes.The results were then compared with geomorphological change maps, providing a broader perspective on the relationship between flood dynamics and river morphology.
Source: Akhbār.
Institution: University of Tehran
Language: English
Subfield: Ecology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4410121433