Use of Very High Resolution Remote Sensing to Derive Geomorphic Features Indicative of Stream Stability
Team: Keith Pelletier, Leslie A. Morrissey
and Donna Rizzo
Streams are dynamic
landscape features that vary across temporal and spatial scales.
A stream attempts to maintain a stable state through the adjustment
of slope or gradient, sediment load, width to depth ratio,
and discharge. Climatic events and anthropogenic disturbance
may cause instability through the alteration of one or more
of these variables, causing the stream to adjust until it
returns to a stable state. These changes can often be detected
in the straight or meandering pattern exhibited by a stream.
While it is possible to study stream pattern fluctuations
in the field, the area covered by streams within multiple
watersheds requires a view from above that is the planform
pattern of the stream, where it is possible to assess the
current condition and conditions that have interacted or persisted
over years or decades.