HR: 1330h
AN: NB33E-06 [Abstracts]
TI: Management and Monitoring of Sediment Impacts From River Restoration Activities
AU: * Braatz, D A
EM: dbraatz@streamsidesystems.com
AF: Streamside Systems, LLC, P.O. Box 245, Boonville, NC 27011 United States
AU: Taylor, M
EM: mark@ecologic-nc.com
AF: EcoLogic Engineering/Construction, 4321-A South Elm-Eugene St, Greensboro, NC 27406 United States
AU: Bridle, K
EM: ken@ecologic-nc.com
AF: EcoLogic Engineering/Construction, 4321-A South Elm-Eugene St, Greensboro, NC 27406 United States
AB:
Despite countless regulations, BMP's, and sedimentation/erosion control measures, sediment continues to significantly impact
surface waters and biological communities. A Natural Channel Design project (Snow Creek, Stokes Co, NC) incorporated the
first application of Streamside Systems' passive sediment collector technology to minimize downstream sediment impacts.
Collectors below the construction reach selectively removed targeted particle sizes moving as bedload and filtered the output for upland disposal. Initial construction activity caused high transport of TSS and organic debris; only 2 yd3 of
bed-migrating sand was removed in two months while the channel aggraded. Progressive stabilization and coarsening of
substrates later increased sand transport and removal rates to 20 yds3/wk. Such technology is critical for assessing and
controlling impacts of in-channel activities. Streamside Collectors can monitor transport rates of targeted sizes of bed
sediments in addition to preventing their downstream habitat impacts. Independent Performance Testing by the Hydraulics
Laboratory at Colorado State University (preliminary data) show removal efficiency as high as 90 percent. Collectors may
also be used in series to increase removal efficiency, and for fine sediments such as iron floc (Koski 2004). Regulators and responsible contractors have a new tool for monitoring and restoring sediment-impacted habitats.
UR: http://www.streamsidesystems.com
DE: 1625 Geomorphology and weathering (1824, 1886)
DE: 1815 Erosion and sedimentation
DE: 1824 Geomorphology (1625)
DE: 1894 Instruments and techniques
DE: 9805 Instruments useful in three or more fields
SC: North American Benthological Society [NB]
MN: 2005 Joint Assembly