A5102774497- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Remote Sensing and LiDAR Applications
- Geological formations and processes
- Hydraulic flow and structures
- Aeolian processes and effects
- Landslides and related hazards
- Flood Risk Assessment and Management
- Nuclear physics research studies
- 3D Surveying and Cultural Heritage
- Hydrology and Watershed Management Studies
- Advanced Vision and Imaging
- Optical measurement and interference techniques
- Fluid Dynamics and Turbulent Flows
- Fish Ecology and Management Studies
- Inorganic Fluorides and Related Compounds
- Crystallography and Radiation Phenomena
- Quantum Dots Synthesis And Properties
- Robotics and Sensor-Based Localization
- High-pressure geophysics and materials
- Fluorine in Organic Chemistry
- Nuclear Physics and Applications
- X-ray Diffraction in Crystallography
- Coastal and Marine Dynamics
- Boron and Carbon Nanomaterials Research
Institut für Klinische Forschung und Entwicklung
2023
Karlsruhe Institute of Technology
2023
University of Auckland
2013-2022
University of Aberdeen
2007
University of Iowa
1970-1996
University of Cape Town
1993
University of Münster
1971-1978
University of Freiburg
1970-1978
Deutsche Forschungsgemeinschaft
1974
Acatech
1961-1970
Scouring downstream of submerged weirs is a common problem resulting from the interaction three-dimensional turbulent flow field around structures and mobile channel bed. This paper presents distributions patterns, bed shear stresses, turbulence in approach scour hole weir. The experiments were conducted under clear-water condition for an equilibrium hole. experimental results show that are considerably changed by presence structure. A large recirculation zone reattachment region formed...
Weirs or bed sills are low-head hydraulic structures used for stabilization, raising upstream water level, and reducing flow velocity. During high-flow events, the weir is fully submerged in river scouring occurs both downstream of weir. For a weir, scour mechanism around dependent on approach intensity (clear-water conditions live-bed conditions) regimes (surface-flow regime impinging-jet regime) over The fast evolution underwater mobile topographies propagating bedforms increase...
Submerged weirs are river training structures that used for raising upstream water level, bed stabilization and reducing flow velocity. This paper presents an experimental study of local scour at submerged in sand-bed channels. Two types tests (coarse sand fine tests) were conducted to investigate the effects sediment size tailwater depth on scouring weirs. The regimes over weir found be independent size, transition regime boundary can expressed as a function Froude number ratio height...
Abstract In situ measurement of grain‐scale fluvial morphology is important for studies on grain roughness, sediment transport and the interactions between animals geomorphology, topics relevant to many river practitioners. Close‐range digital photogrammetry (CRDP) terrestrial laser scanning (TLS) are two most common techniques obtain high‐resolution elevation models (DEMs) from surfaces. However, field application topography remote sensing at scale presently hindered mainly by tedious...
Abstract Contemporary management practices have artificially confined (strangled) river systems in Aotearoa New Zealand to support intensified land use riparian areas. These work against nature, diminishing the functionality and biodiversity values of living rivers, associated socio‐cultural relations with rivers. River confinement can accentuate flood risk by promoting development vulnerable locations limiting flexibility adapt changing climate, prospectively accentuating future disasters....
In this two-part study, experiments are conducted to evaluate available topography measurement techniques for gravel beds in a laboratory flume and study their suitability statistical roughness analysis. The instruments include (1) an acoustic bed profiler; (2) hand-held laser scanner; (3) two digital consumer cameras forming stereophotogrammetric system, employed obtain elevation models (DEMs) of water-worked beds. the first part three reviewed feasibilities future grain-scale work...
Temporal entrainment characteristics and mixing processes of sediment-laden turbidity currents interacting with a rectangular obstacle are investigated through lock-exchange experiments. Building on the Morton-Taylor-Turner hypothesis, dependency temporal non-dimensional parameters is examined. Currents varying density analyzed during slumping phase over smooth rough substrates. Quantitative qualitative observations captured high resolution, framerate binary thresholding techniques....
Abstract There is a growing consensus that gravel‐bed roughness should be parameterized based on bed‐surface topography, not only sediment size. One benefit the possible identification of various spatial scales surface and evaluation their respective contributions to flow resistance (and also bedload transport). The absence relationships between at different apparent in previous work, which currently limits parameterization from topography application modeling. This study examines use...
Abstract Increased knowledge of clusters is essential for the understanding sediment transport behavior and monitoring protection aquatic life. A physical study using graded river gravels conducted in a laboratory environment. Using photogrammetry painted gravels, cluster identification tool (CIT) developed based on image subtraction between subsequent frames, allowing any stable areas groups particles bed. This combined with digital particle tracking (DPT) to present novel approach...