Progressive alluviation and channel morphology in the lower reaches of the Amur River

Abstract

The paper considers specific features of channel morphology related to progressive alluviation within the lower reaches of the Amur River. The progressive character of the process is argued on the basis of sediment budget along the river, analysis of water discharge versus level graphs, and some morphological elements (such as dammed lakes in tributary mouths). Evolution of channel furcation is traced within valley sections with broad floodplain or incised channels. A new type of furcation is described, that is floodplain-channel furcations which are characteristic of rivers in the process of alluviation.