Floodplain function is reduced when channel morphology
prevents connection between the stream and floodplain surface, leading to alterations in flood frequency, soil morphology, and groundwater dynamics.
The river channel morphology
is another important variable that reflects the adjustment of the river to the material excavation since it is a result of the action exerted by the flow on the material components of the bed and banks (Christofoletti, 1981).
The topics include changes in submarine channel morphology
and slope sedimentation patterns from repeat multi-beam surveys in the Fraser River delta in western Canada, geology metrics for predicting shoreline change using seabed and sub-bottom observations from the surf zone and near-shore, seabed disturbance and bedform distribution and mobility on the storm-dominated Sable Island Bank of the Scotian Shelf, analyzing bedforms mapped using multi-beam sonar to determine regional bedload sediment transport patterns in the San Francisco Bay coastal system, and seasonal and spatial variation in suspended sediment characteristics off the Changjuang estuary.
I particularly liked the way the descriptions of bed and bank morphology were used to discuss channel morphology
These functions include modifying stream temperature and controlling light quantity and quality, enhancing habitat diversity, modifying channel morphology
, and enhancing food webs and species richness (as shown on this magazine's cover).
Differences in CWD frequency and size between the two reaches have important consequences for observed variations in channel morphology
and sediment storage.
Successive longitudinal thalweg surveys were used to document treatment effects on channel morphology
(Harrelson et al.
Too often an eroding cutbank is repaired but the "extra" effort of reprofiling the opposing bank and creating a more natural channel morphology
is not undertaken.
Thus the excavation of channels to protect urban development changes channel morphology
Recovery of aquatic populations in modified channels often depends upon adjustments or alterations of the channel morphology
, he notes, and he also discusses how geomorphology is used to develop alternative designs and strategies to minimize the impact on natural resources.
Many of the recovering sites were developing two-stage channel morphology
(Ward and Trimble, 2004), such that benches were beginning to form even within dredged, trapezoidal shaped channels.