See more from this Division: Topical Sessions
See more from this Session: Sediment in Fluvial Systems: Production, Transport, and Storage at the Watershed Scale I
Abstract:
Aerial photographs show that the Newport Bay-head Delta has prograded at a non-linear rate since 1958. A sudden increase in the rate of delta-shoreline advance is recognized to have occurred between 1964 and 1967, coinciding with the onset of silvicultural practices (road construction and initial deforestation) and a period of increased storminess (i.e. high precipitation and runoff). Sedimentation rates calculated for a pond within the installation are also marked by an increase during this time period. Since the establishment of the silviculture operation, subsequent episodes of delta progradation seem to coincide more closely with periods of increased storminess.
Although erosion can be expected to increase during periods of deforestation, sediments within the silvicultural installation are not mobilized until high-energy discharge events occur.
See more from this Division: Topical Sessions
See more from this Session: Sediment in Fluvial Systems: Production, Transport, and Storage at the Watershed Scale I