Details
| Original language | English |
|---|---|
| Article number | 3089 |
| Journal | ENERGIES |
| Volume | 12 |
| Issue number | 16 |
| Early online date | 10 Aug 2019 |
| Publication status | E-pub ahead of print - 10 Aug 2019 |
Abstract
The present article presents results of a laboratory study on the assessment of erosion patterns around a hydrodynamic transparent offshore foundation exposed to combined waves and currents. The model tests were conducted under irregular, long-crested waves in a scale of 1:30 in a wave-current basin. A terrestrial 3D laser scanner was used to acquire data of the sediment surface around the foundation structure. Tests have been conducted systematically varying from wave- to current-dominated conditions. Different volume analyzing methods are introduced, which can be related for any offshore or coastal structure to disclose physical processes in complex erosion patterns. Empirical formulations are proposed for the quantification of spatially eroded sediment volumes and scour depths in the near-field and vicinity of the structure. Findings from the present study agree well with in-situ data stemming from the field. Contrasting spatial erosion development between experimental and in-situ data determines a stable maximum of erosion intensity at a distance of 1.25 A, 1.25 times the structure's footprint A, as well as a global scour extent of 2.1-2.7 A within the present study and about 2.7-2.8 A from the field. By this means, a structure-induced environmental footprint as a measure for erosion of sediment affecting marine habitat is quantified.
Keywords
- Erosion patterns, Jacket, Laboratory tests, Offshore wind farm, Scour, Sediment transport, Spatial resolution, Wave-current interaction
ASJC Scopus subject areas
- Mathematics(all)
- Control and Optimization
- Energy(all)
- Energy (miscellaneous)
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Electrical and Electronic Engineering
- Energy(all)
- Renewable Energy, Sustainability and the Environment
Sustainable Development Goals
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In: ENERGIES, Vol. 12, No. 16, 3089, 10.08.2019.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Volume-Based Assessment of Erosion Patterns around a Hydrodynamic Transparent Offshore Structure
AU - Welzel, Mario
AU - Schendel, Alexander
AU - Schlurmann, Torsten
AU - Hildebrandt, Arndt
N1 - Funding Information: Funding: The present study is part of the research project “HyConCast—Hybrid substructure of high strength concrete and ductile iron castings for offshore wind turbines” (BMWI: 0325651A). The authors gratefully acknowledge the support of the German Federal Ministry for Economic Affairs and Energy within the funded project. The publication of this article was funded by the Open Access fund of Leibniz Universität Hannover.
PY - 2019/8/10
Y1 - 2019/8/10
N2 - The present article presents results of a laboratory study on the assessment of erosion patterns around a hydrodynamic transparent offshore foundation exposed to combined waves and currents. The model tests were conducted under irregular, long-crested waves in a scale of 1:30 in a wave-current basin. A terrestrial 3D laser scanner was used to acquire data of the sediment surface around the foundation structure. Tests have been conducted systematically varying from wave- to current-dominated conditions. Different volume analyzing methods are introduced, which can be related for any offshore or coastal structure to disclose physical processes in complex erosion patterns. Empirical formulations are proposed for the quantification of spatially eroded sediment volumes and scour depths in the near-field and vicinity of the structure. Findings from the present study agree well with in-situ data stemming from the field. Contrasting spatial erosion development between experimental and in-situ data determines a stable maximum of erosion intensity at a distance of 1.25 A, 1.25 times the structure's footprint A, as well as a global scour extent of 2.1-2.7 A within the present study and about 2.7-2.8 A from the field. By this means, a structure-induced environmental footprint as a measure for erosion of sediment affecting marine habitat is quantified.
AB - The present article presents results of a laboratory study on the assessment of erosion patterns around a hydrodynamic transparent offshore foundation exposed to combined waves and currents. The model tests were conducted under irregular, long-crested waves in a scale of 1:30 in a wave-current basin. A terrestrial 3D laser scanner was used to acquire data of the sediment surface around the foundation structure. Tests have been conducted systematically varying from wave- to current-dominated conditions. Different volume analyzing methods are introduced, which can be related for any offshore or coastal structure to disclose physical processes in complex erosion patterns. Empirical formulations are proposed for the quantification of spatially eroded sediment volumes and scour depths in the near-field and vicinity of the structure. Findings from the present study agree well with in-situ data stemming from the field. Contrasting spatial erosion development between experimental and in-situ data determines a stable maximum of erosion intensity at a distance of 1.25 A, 1.25 times the structure's footprint A, as well as a global scour extent of 2.1-2.7 A within the present study and about 2.7-2.8 A from the field. By this means, a structure-induced environmental footprint as a measure for erosion of sediment affecting marine habitat is quantified.
KW - Erosion patterns
KW - Jacket
KW - Laboratory tests
KW - Offshore wind farm
KW - Scour
KW - Sediment transport
KW - Spatial resolution
KW - Wave-current interaction
KW - Erosion
KW - Offshore oil well production
KW - Scanning
KW - Underwater foundations
KW - Laboratory test
KW - Wave current interaction
KW - Offshore wind farms
KW - Erosion patterns
KW - Jacket
KW - Laboratory tests
KW - Offshore wind farm
KW - Scour
KW - Sediment transport
KW - Spatial resolution
KW - Wave-current interaction
UR - http://www.scopus.com/inward/record.url?scp=85070702761&partnerID=8YFLogxK
U2 - 10.3390/en12163089
DO - 10.3390/en12163089
M3 - Article
VL - 12
JO - ENERGIES
JF - ENERGIES
SN - 1996-1073
IS - 16
M1 - 3089
ER -