Virginia Water Science Center
Period of Project:
USGS IN YOUR STATE
USGS Water Science Centers are located in each state.
Roanoke River Survey
The U.S. Army Corps of Engineers (USACE), Wilmington
District and the City of Roanoke, Virginia began construction of a
congressionally authorized Roanoke River Flood Reduction Project (RRFRP)
in 2005. RRFRP implementation activities include: construction activities,
stream bank vegetation changes, and floodplain geometry changes which are
occurring in a complicated urban river system.
These activities may impact water quality, particularly sediment
loading, in the vicinity of the project area, as well as downstream.
The primary concerns related to stream geomorphology
include sediment aggradation in
1) To survey stream and floodplain cross sections to
provide annual topographic data at 15 sites within the
2) To collect substrate particle-size data at 15 sites
Relevance and Benefits:
Cross section surveys and substrate data collection
will be done at six sites in the ‘reference reach’ upstream of the
RRFRP, and at nine sites in the ‘construction reach’ of the RRFRP.
Surveys of sites within the reference reach should serve as a
control for observing changes or impacts from sources upstream of the
RRFRP construction area in the watershed.
All sites will be monitored for geomorphologic changes over time.
Monitoring activities should help document any impacts to the
Map of Study Area: