Some parameters, such as floodplain width and the width of abutments, were found to be both subject to high uncertainty and also very influential for the estimation of scour risk, leading to reduction in the confidence in scour risk assessments.
The observed trends in the alluvial-architecture parameters are related to the ratio between channel-belt width and floodplain width, variations in aggradation rate, location of the cross sections relative to avulsion sites, and differential subsidence.
These threshold scales are ~ 15 20% and 150% of the main channel width (1 2% and 10 15% of the floodplain width), respectively.
The variation of the floodplain width does not affect these erosion-deposition behaviors while changing the magnitude and patterns of floodplain deposition.
Superposed on this general scaling pattern, disturbed by lithological variations, are the variations in floodplain width caused by disturbances in the geomorphic system, which influence floodplain slope, sediment, and water discharge and which include inherited landscapes.
The diagnostic parameters selected for the classification are floodplain width, floodplain (or valley floor) slope, valley confinement (expressed by a longitudinal profile index, LPI), channel sinuosity (indicating river mechanism), and valley depth.
This study primarily examines floodplain width in four tributaries to the Minnesota River in southern Minnesota, namely the Maple, Le Sueur, and Blue Earth Rivers and Seven Mile Creek.
Based on these AGOs, an analysis of the variability of the floodplain width was performed.
The social survey revealed key discrepancies between floodplain residents and non-floodplain residents.
Recent studies have pointed towards the importance of online coupling strategies, representing feedbacks between floodplain inundation and vertical hydrology.
