Sediment Management Technologies W. H. McAnally PhD, PE, D.CE, D.NE, F.ASCE Research Professor of Civil & Environmental Engineering Mississippi State University, USA. [email protected]R. Kirby BSc, PhD, C.Geol, Dist.D.NE, FGS Director & Board Member Sediment Innovation Centre (SICEM) Emden, Germany. [email protected]
15
Embed
Sediment Management Technologies W. H. McAnally PhD, PE, D.CE, D.NE, F.ASCE Research Professor of Civil & Environmental Engineering Mississippi State University,
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Sediment Management Technologies
W. H. McAnally PhD, PE, D.CE, D.NE, F.ASCE Research Professor of Civil & Environmental Engineering
• Sediment accumulation reduces available depth• Dredging & disposal are expensive• Dredging & disposal are often environmentally
disruptive• Environmental windows
limit dredging• Placement sites are limited
Engineering Solutions
Krone’s 3 ways to address sediment deposition:• Keep sediment out• Keep it moving• Remove it
Photos courtesy of Corps of Engineers
PIANC WG 102: Minimizing Harbor SiltationSix Methods Taxonomy
METHOD DESCRIPTION1. Keep Sediment Moving
(KSM) and mainly passive:
Locate/relocate port to deeper water, locate berths alongside channels rather than on waterway margin, apply equilibrium regime theory concepts, dredge channels parallel to natural flow, etc.
2. KSM and passive Longitudinal/perpendicular training walls/groins, dikes, or sills.
3. KSM and active Bed -mounted, automatic pumps fed by water injection, and applicable at impounded or semi-enclosed basins; early stage (i.e. before consolidation) water injection alone; bar/shoal removal, scour/propeller jets, etc.
4. Keep Sediment Out (KSO) and active
For impounded docks, adopt low solids, surface water intakes, or resort to intermediate settlement basins, etc.
5. KSO Through Passive Structures:
For impounded docks, adopt low solids, surface water intakes, or resort to intermediate settlement basins, etc.
6. Keep Sediment Navigable (KSN) and passive/active
Adopt Passive or Active Nautical Depth and Conditioning
COPRI: Sed Solutions TaxonomyCATEGORY STRATEGY EXAMPLES
Prevention
KSP – Keep Sediment in PlaceErosion control on land and/or bed and banks