Difference between revisions of "2DH numerical hydrodynamic models"
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==Basic principles== | ==Basic principles== | ||
| − | Fundamental equations for conservation of water mass and water flow momentum, spatially averaged over water depth and time-averaged over all turbulent fluctuations (RANS = Reynolds Averaged Navier-Stokes equation) or time-averaged over only the smaller turbulent fluctuations (LES = Large Eddy Simulation) | + | Fundamental equations for conservation of water mass and water flow momentum, spatially averaged over water depth (hence “H” for horizontal plane in “2DH”) |
| + | and time-averaged over all turbulent fluctuations (RANS = Reynolds Averaged Navier-Stokes equation) or time-averaged over only the smaller turbulent fluctuations (LES = Large Eddy Simulation) | ||
==Outputs== | ==Outputs== | ||
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===Theoretical background=== | ===Theoretical background=== | ||
| − | Anderson M.G. (ed.) (2000): Special Issue: The TELEMAC Modelling System. Hydrological Processes, Vol. 14, pp. 2207-2364. | + | Anderson M.G. (ed.) (2000): Special Issue: The TELEMAC Modelling System. Hydrological Processes, Vol. 14, pp. 2207-2364. http://onlinelibrary.wiley.com/doi/10.1002/1099-1085%28200009%2914:13%3C%3E1.0.CO;2-6/issuetoc |
| − | http://onlinelibrary.wiley.com/doi/10.1002/1099-1085%28200009%2914:13%3C%3E1.0.CO;2-6/issuetoc | + | |
Beffa C. (2003): 2D-Strömungssimulation mit Flumen. ÖWAV-Seminar 26.-27.2.2003 "Fließgewässermodellierung - von der Ein-zur Merhdimensionalität?!", Wien. | Beffa C. (2003): 2D-Strömungssimulation mit Flumen. ÖWAV-Seminar 26.-27.2.2003 "Fließgewässermodellierung - von der Ein-zur Merhdimensionalität?!", Wien. | ||
Latest revision as of 17:08, 22 October 2014
2DH numerical hydrodynamic models
Type
Hydromorphological models
Basic principles
Fundamental equations for conservation of water mass and water flow momentum, spatially averaged over water depth (hence “H” for horizontal plane in “2DH”) and time-averaged over all turbulent fluctuations (RANS = Reynolds Averaged Navier-Stokes equation) or time-averaged over only the smaller turbulent fluctuations (LES = Large Eddy Simulation)
Outputs
Flow velocities, water depths, water levels, flow shear stresses
Rivertypes
Related Pressures
- Surface water abstraction
- Groundwater abstractions
- Hydropeaking
- Sediment discharge from dredging
- Reservoir flushing
- Hydrological regime modification
- Interbasin flow transfers
- Discharge diversions and returns
- Colinear connected reservoir
- Artificial barriers downstream from the site
- Artificial barriers upstream from the site
- Alteration of instream habitat
- Sand and gravel extraction
- Sedimentation and sediment input
- Embankments, levees or dikes
- Loss of vertical connectivity
- Impoundment
- Alteration of riparian vegetation
- Channelisation / cross section alteration
- Other pressures
Related Measures
- Improve/Create water storage
- Reduce water consumption
- Increase minimum flows
- Recycle used water
- Improve water retention
- Reduce surface water abstraction with return
- Water diversion and transfer
- Reduce surface water abstraction without return
- Reduce groundwater extraction
- Reduce anthropogenic flow peaks
- Modify hydropeaking
- Shorten the length of impounded reaches
- Increase flood frequency and duration in riparian zones or floodplains
- Favour morphogenic flows
- Link flood reduction with ecological restoration
- Ensure minimum flows
- Manage aquatic vegetation
- Establish environmental flows / naturalise flow regimes
- Facilitate downstream migration
- Manage sluice and weir operation for fish migration
- Remove barrier
- Install fish pass/bypass/side channel for upstream migration
- Modify culverts, syphons, piped streams
- Fish-friendly turbines and pumping stations
- Create low flow channels in over-sized channels
- Narrow water courses
- Widen water courses
- Allow/increase lateral channel migration or river mobility
- Remeander water courses
- Shallow water courses
- Improve backwaters
- Lower river banks or floodplains to enlarge inundation and flooding
- Isolation of water bodies
- Reconnect backwaters and wetlands
- Remove hard engineering structures that impede lateral connectivity
- Construct semi-natural/articificial wetlands or aquatic habitats
- Set back embankments, levees or dikes
- Restore wetlands
- Retain floodwater
Useful references
Selected software systems
AQUADYN: http://www.scisoftware.com/environmental_softwar/detailed_description.php?products_id=76
Basement: http://www.basement.ethz.ch/
CCHE2D: http://www.ncche.olemiss.edu/cche2d
Delft3D: http://www.deltaressystems.com/hydro/product/621497/delft3d-suite
FLO-2D: http://www.flo-2d.com/
FLUMEN: http://www.fluvial.ch/p/flumen.html
HydroAS-2D: http://www2.hydrotec.de/vertrieb/hydro_as_2d
Mike21: http://www.mikebydhi.com/Products/WaterResources/MIKE21C.aspx
Mike Flood: http://www.mikebydhi.com/Products/WaterResources/MIKEFLOOD.aspx
River 2D: http://www.river2d.ualberta.ca/
RSim-2D:
Rubar20: http://www.irstea.fr/rubar20
SOBEK1D2D: http://www.deltaressystems.com/hydro/product/108282/sobek-suite
Telemac2D: http://www.opentelemac.org/
WAQUA:
Theoretical background
Anderson M.G. (ed.) (2000): Special Issue: The TELEMAC Modelling System. Hydrological Processes, Vol. 14, pp. 2207-2364. http://onlinelibrary.wiley.com/doi/10.1002/1099-1085%28200009%2914:13%3C%3E1.0.CO;2-6/issuetoc
Beffa C. (2003): 2D-Strömungssimulation mit Flumen. ÖWAV-Seminar 26.-27.2.2003 "Fließgewässermodellierung - von der Ein-zur Merhdimensionalität?!", Wien.
DHI (2007): MIKE 21 & MIKE 3 flow model FM, Hydrodynamic and Transport Module Scientific Documentation, DHI Water & Environment, Hørsholm, Denmark.
Leendertse J.J. (1967): Aspects of a computer model for long period water-wave propagation. Memorandum RM-5294-PR, Rand Corporation, Santa Monica.
Yafei J. and Khan A.A. (2001): CCHE2D: Two-dimensional Hydrodynamic and Sediment Transport Model for Unsteady Open Channel Flows over Loose bed. Technical Report, National Center for Computational Hydroscience and Engineering, The University of Mississippi, USA.
Sample applications
Hauer C., Unfer G., Schmutz S., Tritthart M. and Habersack, H. (2007): The necessity of modelling the stability of rheophilous cyprinids spawning grounds including comparing 1D, 2D and 3D numerical models. Proc. 6th Ecohydraulics Symposium, 18.-23.2.2007, Christchurch, Neuseeland.
Kahn A.A., Cadacid R. and Wang S.S.-Y. (2000): Simulation of Channel Confluence and Bifurcation using CCHE2D Model. Journal of Water and Maritime Engineering, The Institution of Civil Engineers/IAHR, Vol. 142.
