CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Croil, J.S.
Date : 2002.
Title : Channel pattern alternation, anabranch development and floodplain evolution of the lower Grand River, Ontario.
Publication : Unpublished MSc thesis. University of Toronto, Toronto.
Issue :
Page(s) : 235 p.
Abstract
Caledonia, Ontario, was investigated to determine controls on channel pattern alternation between single thread and anabranched morphologies. Planform alternation occurs with enhanced channel confinement from bedrock and resistant Quaternary sediment and occurs with local increases in channel gradient. Downstream of zones of confinement, floodplain width increases and up to five channels divide around large, stable alluvial islands. Floodplain deposits in anabranched reaches are on average thicker, coarser-grained, more highly structured, lack paleosols, and store larger volumes of sediment compared to single thread reaches. Large islands in the study area pre-date significant human watershed disturbance and anabranching may have initiated with base level rise and aggrading conditions during the mid-Holocene.
Bibliography of Canadian Geomorphology