Details
| Original language | English |
|---|---|
| Article number | 05020001 |
| Number of pages | 13 |
| Journal | Journal of Waterway, Port, Coastal and Ocean Engineering |
| Volume | 146 |
| Issue number | 4 |
| Publication status | Published - 1 Apr 2020 |
Abstract
The tidally influenced shipyard Elsflether Werft, Germany, has experienced a large increase in siltation and short periods of refilling since the 2000s. Its navigational depth was reduced by over 2 m in 2017 and by 0.5 m within only 4 months in 2014. A comprehensive field study was conducted in 2016 employing a time-lapse camera, multiparameter probes, sediment traps, vessel-based measurements, and unmanned aerial observations. Measurements show a strong shear flow along the dock entrance, as well as distinct turbidity signal spikes during regular and neap tides, which are drowned during spring tides. Deploying an unmanned aerial system (UAS), sediment plumes entering the dock were observed. Introducing a biodegradable tracer into the dock, a vortex structure was monitored by the UAS and orthophoto sequences processed by particle image velocimetry yielding time-averaged surface flow patterns and magnitudes, which correlate well with other measurements. Contextual data revealed a cross-sectional widening and river-bed geometry changes, which indicate increased siltation rates attributable to a retention basin effect.
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Environmental Science(all)
- Water Science and Technology
- Engineering(all)
- Ocean Engineering
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In: Journal of Waterway, Port, Coastal and Ocean Engineering, Vol. 146, No. 4, 05020001, 01.04.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Spatiotemporal Iinvestigation of event-driven sedimentation in a tidally influenced shipyard by air and waterborne observations
AU - Lojek, O.
AU - Tiede, J.
AU - Visscher, J.
AU - Cossu, R.
AU - Schlurmann, T.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - The tidally influenced shipyard Elsflether Werft, Germany, has experienced a large increase in siltation and short periods of refilling since the 2000s. Its navigational depth was reduced by over 2 m in 2017 and by 0.5 m within only 4 months in 2014. A comprehensive field study was conducted in 2016 employing a time-lapse camera, multiparameter probes, sediment traps, vessel-based measurements, and unmanned aerial observations. Measurements show a strong shear flow along the dock entrance, as well as distinct turbidity signal spikes during regular and neap tides, which are drowned during spring tides. Deploying an unmanned aerial system (UAS), sediment plumes entering the dock were observed. Introducing a biodegradable tracer into the dock, a vortex structure was monitored by the UAS and orthophoto sequences processed by particle image velocimetry yielding time-averaged surface flow patterns and magnitudes, which correlate well with other measurements. Contextual data revealed a cross-sectional widening and river-bed geometry changes, which indicate increased siltation rates attributable to a retention basin effect.
AB - The tidally influenced shipyard Elsflether Werft, Germany, has experienced a large increase in siltation and short periods of refilling since the 2000s. Its navigational depth was reduced by over 2 m in 2017 and by 0.5 m within only 4 months in 2014. A comprehensive field study was conducted in 2016 employing a time-lapse camera, multiparameter probes, sediment traps, vessel-based measurements, and unmanned aerial observations. Measurements show a strong shear flow along the dock entrance, as well as distinct turbidity signal spikes during regular and neap tides, which are drowned during spring tides. Deploying an unmanned aerial system (UAS), sediment plumes entering the dock were observed. Introducing a biodegradable tracer into the dock, a vortex structure was monitored by the UAS and orthophoto sequences processed by particle image velocimetry yielding time-averaged surface flow patterns and magnitudes, which correlate well with other measurements. Contextual data revealed a cross-sectional widening and river-bed geometry changes, which indicate increased siltation rates attributable to a retention basin effect.
KW - Antennas
KW - Docks
KW - Hydraulic structures
KW - Shear flow
KW - Shipyards
KW - Tides
KW - Unmanned aerial vehicles (UAV)
KW - Velocity measurement
KW - Aerial observations
KW - Geometry change
KW - Multiparameters
KW - Particle image velocimetries
KW - Retention basins
KW - Surface flow patterns
KW - Unmanned aerial systems
KW - Vortex structures
KW - Ships
KW - airborne survey
KW - ocean tide
KW - river bed
KW - sedimentation
KW - shipborne measurement
KW - siltation
KW - spatiotemporal analysis
KW - Germany
KW - Rumex
UR - http://www.scopus.com/inward/record.url?scp=85083082560&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)WW.1943-5460.0000572
DO - 10.1061/(ASCE)WW.1943-5460.0000572
M3 - Article
VL - 146
JO - Journal of Waterway, Port, Coastal and Ocean Engineering
JF - Journal of Waterway, Port, Coastal and Ocean Engineering
SN - 0733-950X
IS - 4
M1 - 05020001
ER -