Property:Extended movie description
From CSDMS
This is a property of type Text.
S
Sand ripple migration, shown at various speeds. The ripples are generally climbing and processes such as avalanching, scour pit formation and merging of bedforms can be seen. +
Sheet flow style bed load transportation with colored marker stones. In this form of bed load transport a portion of the bed moves as a unified sheet. +
Shore line modeling taking coastal erosion and depositional processes into account. Beach profile follows the sea level and barrier islands form during transgression. +
Shore line modeling without coastal processes. The beach profile does not migrate and barrier islands do not form. +
Shoreline Transgression & Regression. This movie shows the relationship between delta building and basin subsidence. The sediment make up of this experiment is fine grained quartz and coal sand. The lighter coal sand moves farther into the basin, acting as a proxy for finer grained sediment in real systems. Key features and events are labeled throughout the movie. +
F
Simulation of ANUGA, a hydrodynamics model. This simulation used data of many rainfall gauges in the Boulder Creek watershed. It then calculated the infiltration of the water, and the remaining water drained as runoff to the main tributary streams and ultimately North and South Boulder Creek into teh Eastern Plains. There are two pulses of rainfall visible moving through the system. +
S
Simulation of fluvial incision in the shelf during a glacial-interglacial sea level cycle. This simulation represents the East Coast of the US, i.e. close to Chesapeak Bay and Delaware Bay. During lowstand, at glacial maximum the entire shelf is actively incised and reworked by fluvial systems. +
F
Simulation of hydrodynamics with ANUGA. +
A
Simulation of river bedform by large eddy simulation (LES), and sediment as spherical particles.
Related papers are:
doi: 10.1002/wrcr.20457
doi: 10.1002/wrcr.20303
doi: 10.1029/2012WR011911 +
P
Standard river plume formation without the effects of coastal processes. The the color scale shows the separation of different grain sizes where larger, heavier particles settle out first, and spread on the sea floor. +
A
Subglacial discharge simulated for Gornergletscher: arrows depict discharge in the distributed system, blue shows discharge in channels. +
C
The Cook Inlet, an estuary adjacent to Northern Pacific Ocean experiences very large tidal range. Dr. Mark Johnson at University of Alaska-Fairbank (UAF) and Dr. Andrey Proshuntinsky at Woods Hole Oceanographic Institution (WHOI), applied the Finite-Volume Coastal Ocean Model (FVCOM) to this environment to better understand the dramatic tides present.
https://csdms.colorado.edu/wiki/Model:FVCOM +
S
The HSTAR model is developed to investigate the morphological change in large=-scale river systems. It uses the shallow water equations and nested sediment transport and erosion algorithms to control the changes in the river due to varying water transport. The model has a unique ability to mimick the growth of vegetation on river bars that are not inundated anymore.
This simulation runs for 350 years (in modeled time) and you can see the river system evolve. First there are just mid channel bars, then a river with multiple channel treads evolves. This pattern is commonly observed in nature (for example in the Amazon Basin). You can also see bend migration and bar cutt-offs once the river system rreaches a more stable pattern. +
The HSTAR model is developed to investigate the morphological change in large-scale river systems. It uses the shallow water equations and nested sediment transport and erosion algorithms to control the changes in the river due to varying water transport. The model has a unique ability to mimick the growth of vegetation on river bars that are not inundated anymore. This simulation runs for 350 years (in modeled time) and you can see the river system evolve. This simulation is set up for a coarse-grained sediment (grainsize 0.4 mm).
In the simulation mid channel bars form and persist. This pattern is commonly observed in nature (perhaps a close example is the Brahmaputra river). You can also see bar migration, compound bar evolution (where bars are merging). New deposition happens in the leeward side of vegetated bars, where flow velocities are lower.
These simulations have a feedback between the growth of vegetation and bar accretion- the vegetated bars will experience slower flow rates and thus more sediment can settle on top of them. +
R
The Rio Puerco is a major tributary to the Rio Grande in New Mexico, USA. It is presently an incised arroyo system, with ephemeral flow. Significant river flow only occurs when large rain storms hit the drainage basin, in other times of the year it is a dry river bed with stagnant pools.
The incised river valley has extensive coverage of Tamarisk Trees, an invasive species. In 2003 a section of the river system was sprayed with herbicides and vegetation died off. These simulations investigate the effect of varying vegetation coverage in the river system.
In August 2006, a large rain event occurred and a peak flow was observed at the river observation stations. The simulations show how the river water depth for those flood conditions vary at 0% vegetation, at 10% and at 20% vegetation coverage. You can see the channel system incised and with a single thread channel that meanders and then water spilling into chute channels and adjacent floodplain basins. +
The Rio Puerco is a major tributary to the Rio Grande in New Mexico, USA. It is presently an incised arroyo system, with ephemeral flow. Significant river flow only occurs when large rain storms hit the drainage basin, in other times of the year it is a dry river bed with stagnant pools. The incised river valley has extensive coverage of Tamarisk Trees, an invasive species. In 2003 a section of the river system was sprayed with herbicides and vegetation died off. These simulations investigate the effect of varying vegetation coverage in the river system.
In August 2006, a large rain event occurred and a peak flow was observed at the river observation stations. The simulations show how the sedimentation for those flood conditions vary at 0% vegetation, at 10% and at 20% vegetation coverage. You can see the channel system eroded deeply (red) in the barren river system and how both the sedimentation (in blue) and erosion (in red) is much reduced in the more vegetated floodplain. +
The Rio Puerco is a tributary to the Rio Grande in New Mexico. It is a an 'ephemeral' river, meaning that it only runs water once there are larger rainstorms in its watershed, in dry times the riverbed is dry or has only small stagnant ponds of water. The small river is incised into its old floodplain and forms a small arroyo system.
The river has been monitored already for a really long time, there has been a gauging station at teh location of the movie (at the Santa Fe railroad crossing) since 1913.
This movie shows the incised river system. You can see from the photo what the river looks like in dry conditions (April 2014). The movie shows the floodwater in the incised arroyo, the 8m-12m tall Tamarix trees barely stick out of the water. On September 15, 2015, the water even overtopped the valley and gushed into the nearby farm field, and water overflowed the highway.
As you can see, the floodwater is extremely muddy. This small river was a major sediment source into the Rio Grande in the early 20th century. It impacted the downstream reservoir at Elephant Butte. Tamarix, an invasive tree species, was introduced in the 1930's to reduce the sediment load of this river. +
The Rio Puerco is a tributary to the Rio Grande in New Mexico. It is a an 'ephemeral' river, meaning that it only runs water once there are larger rainstorms in its watershed, in dry times the riverbed is dry or has only small stagnant ponds of water. The small river is incised into its old floodplain and forms a small arroyo system. The river has been monitored already for a really long time, there has been a gauging station near the location of the movie (at the Santa Fe railroad crossing) since 1913. The flood of 2013 was exceptionally high.
This movie shows the water running in the nearby old floodplain. You can see from the photo what this location looks like in dry conditions (April 2014). On September 15, 2015, the water overtopped the incised riverbed and gushed into the nearby farm field, and water overflowed the highway.
The river water once it is in the floodplain and not in its main channel experiences more friction and flow is not as fast anymore. Still, the water has enough carrying capacity to transport fine sediment. +
M
The animation shows the modeled evolution of the subglacial drainage system and associated ice sliding speed for a catchment south of Jakobshavn Isbræ (Greenland) in 2011. The left panel shows contours of the hydraulic potential and the network of channels; the right panel shows the sliding speed and channels; and the bottom panel shows the meltwater forcing. +
C
The movie shows a small river confluence in Illinois. The figure shows the bathymetry and dimensions, it is a small system (~8 m wide, 0.65m deep). It is an asymmetrical confluence with concordant bed, the velocity and momentum (rQU) ratios are ~1.0. In that case, the mixing layer development is driven by difference in directions of the streams. Other simulation conditions are: - Re~166,000 (D=0.4m U=0.44 m/s), Fr=0.24 - Maximum scour depth 2.92D
In the movie, obvious eddies develop at the mixing interface, they propagate downstream, complete mixing is not reached in the simulated stretch. +
