Property:Extended movie description
From CSDMS
This is a property of type Text.
R
These two movies show flow field around two common structures in rivers.
Groynes are one of the most effective approaches to stabilize eroding banks and to sustain navigable channels at proper depth. They are utilized in river bank protection as well as restoration projects (e.g., restore fish habitat in degraded streams). This movie shows the case of accidental pollution, a series of groynes can substantially modify the dispersion of the pollutant cloud in the river reach.
Bridge Pillars that support the structure change the flow field and promote local differences in sedimentation and erosion. This movie illustrates the shear stress around a bridge pier. +
These two movies show flow field around two common structures in rivers.
Groynes are one of the most effective approaches to stabilize eroding banks and to sustain navigable channels at proper depth. They are utilized in river bank protection as well as restoration projects (e.g., restore fish habitat in degraded streams). This movie shows the case of accidental pollution, a series of groynes can substantially modify the dispersion of the pollutant cloud in the river reach.
Bridge Pillars that support the structure change the flow field and promote local differences in sedimentation and erosion. This movie illustrates the shear stress around a bridge pier. +
G
This animation follows global wave power as a function of waves for the months of January and February of the year 2000. +
R
This animation is based on a historical flood in the Netherlands and shows the flood in the land between the Maas and Waal Rivers. As is apparent in the line graph at the bottom of the page the majority of the water came from a dike breach on the Waal River. Land elevation is shown in brown and water depth is shown in blue. +
W
This animation is set up to mimick the evolution of a single channel delta forming into a marine basin with high wave climate. The incoming river sediment load goes very rapidly up over time (this is set up so as to simulate a change in climate, i.e. precipitation in the basin goes up). The parameter settings are not thought to be realistic necessarily, we are looking at an extreme case of change. Wave climate is defined as to have an incoming wave height of 1m, period of 6 s, asymmetry of incoming wave angles 0.4 (so a little weighted to the left), and a highness factor of 0.7 (higher proportion of unstable, >45 degrees, waves).
The Ebro delta is a very intriguing delta which, during recent centuries, has been controlled by both natural and man-induced factors. Deforestation of the Ebro drainage basin, by man, resulted in a fast progradation of the deltaic system until this century. Many dams were constructed along the river Ebro resulting in a drastically reduced river sediment discharge, with erosive processes now dominant in the shaping of the Ebro delta coastal area. In reality, the formation of the Ebro delta took place over 100-1000's of years. +
This animation shows results of a Delft3D simulation to study the effects of the passage of a strong cold front on the Wax Lake delta in Atchafalaya Bay, Louisiana (USA). The model domain is 25 by 30km. The movie shows cumulative erosion and deposition due to passage of a number of cold fronts in 2008.
Cold fronts pass every 4-5 days during the winter. Many of the simulations for the Wax Lake in the repository are done for hurricanes, but these particular experiments explore the effects of a cold front. They may be smaller magnitude events, but they happen many times per winter season.
It is clear that erosion and sedimentation in the Wax lake delta is in the order of centimeters per event. This November-December 2008 cold fronts cause about 5 cm of deposition at the fronts of the outermost mouthbars. There is also accumulation near bifurcations, where the flow presumably slows down.
At the same time, certain local areas experience erosion due to the cold fronts (the blue spots). +
This animation shows results of a Delft3D simulation to study the effects of the passage of a strong cold front on the Wax Lake delta in Atchafalaya Bay, Louisiana (USA). The model domain is 25 by 30km. The movie shows water level change due to passage of a strong cold front in December 2008. Cold fronts pass every 5-7 days during the winter. Many of the simulations for the Wax Lake in the repository are done for hurricanes, but these particular experiments explore the effects of a cold front. They may be smaller magnitude events, but they happen many times per winter season.
It is clear that water level changes dramatically in the Wax lake delta associated with a winter storm event. On December 9th 2008 the winter storm pushed the water onshore, causing a water level of about 1.5 m, around 3 times higher than average conditions and the entire delta became submerged. +
This animation shows results of a Delft3D simulation to study the effects of the pasage of a strong cold front on the Wax Lake delta in Atchafalaya Bay, Louisiana (USA). The model domain is 25 by 30km. The movie shows salinity before, during and after the strongest cold front of 2008. Cold fronts pass every 4-5 days during the winter. Many of the simulations for the Wax Lake in the repository are done for hurricanes, but these particular experiments explore the effects of a cold front. They may be smaller magnitude events, but they happen many times per winter season.
Water in the Wax lake delta is relatively fresh, during the entire period there is continuous river discharge being fed into the delta system. The river discharge is more important during low tide and brackish water progrades into the delta during high tides under normal conditions. This is the pulsing of the system you can see in the beginning of the simulation. This December 2008 cold front brings more saline water close to the delta (the red color). It is clear that only the outermost bars of the delta front do get affected much by the higher salinity water. It is unlikely that these short events have a major effect on the wetland vegetation, whereas the simulation of hurricane Ike (also in the repository)killed much of the freshwater/brackish water tolerant species. +
M
This animation shows the global temperature fluctuation through one calendar year. Temperature is measured in degrees Celsius and is visualized using a color scale where colder temperatures are represented by colder colors (blues and greens) and warmer temperatures are represented by warmer colors (yellows and reds). Temperatures were aggregated and averaged by month and geographic location. The global shift in temperature is due to the change in seasons caused by the tilt in the earth’s rotational axis. As the northern and southern hemispheres become closer to the sun (their respective summers) the monthly mean temperature increases. +
A
This animation shows the river meander development on the Allier River near Chateau de Lys, France. This recreation was made from aerial photographs and maps from the years 1946, 1960, 1980, 1982, 1992, 1995 and 1997. +
L
This animations integrates the state of the art knowledge about the retreat of the Laurentide Ice Sheet since the Last Glacial Maximum. +
A
This clip is an interview with Prof. Bob Anderson, University of Colorado, it was posted in the Daily Camera, the Boulder newspaper.
Prof Anderson talks about a study on the northern coastline of Alaska midway between Point Barrow and Prudhoe Bay where the coast is eroding by 15m annually because of declining sea ice, warming seawater and increased wave activity.
A warmer Arctic with a longer sea-ice free season have led to the steady retreat of 15m average and 25m maximum a year of the 4m high bluffs --
frozen blocks of silt and peat containing 50 to 80 percent ice --. These blocks then topple into the Beaufort Sea during the summer months by a combination of large waves pounding the shoreline and warm seawater melting the base of the
bluffs. +
T
This clip shows a tsunami front, loaded with debris, prograding fastly over agricultural fields and the nearby city of Sendai.
It is estimated that the tsunami was about 10 m high when it hit the shoreline, and it traveled upto 10 km inland.
This tsunami was generated by a 8.9 magnitude earthquake in the Pacific Ocean on March 11th, 2011. The epicenter of the earthquake was 130km offshore of Sendai. +
3
This is a 3D model of delta growth. The initial sequence shows the growth of the delta as sediment is deposited seaward. The following sequences show cross sectional views of the formed delta. The color scale represents deposited sediment grain size where blue colors are larger grain sizes and reds are smaller grain sizes. +
N
This is a coupled run of the HydroTrend River flux model and the Coastline Evolution model CEM. The run is not intended to simulate realistic conditions, but it is thought to be a proxy for the Nile delta. The simulation has two river draining to the coast; one has a wave field comming straight at it, the other wave field comes in under an angle. This results in different development; somewhat similar to the Rosetta and Damietta lobes of the Nile delta in Egypt.
For the Nile delta, the first run, kept all parameters constant as discussed above while changing only parameters found in the Wave and Avulsion component. The wave height was set to 1m, period of 6s, asymmetry of 0.4, and highness of 0.7. The avulsion component was set to have two rivers with no deviation, and was restricted to -60 and 70. This appeared somewhat similar to the real Nile with the major difference the angle of the rivers. +
G
This is a high definition animation of global air circulation created by the Community Climate System Model (CCSM) and the National Center for Atmospheric Research (NCAR). It spans one calendar year and is comprised of hourly data. Cloud cover is generally shown in white with areas of precipitation shown in orange. There are many seasonal weather phenomenon visible in different regions of the globe at various times. They include monsoon seasons as well as the paths of winter storms in the northern hemisphere.
In the winter months for the northern hemisphere the storm track can be clearly seen as clouds carrying lots of moisture come south from Alaska and hit the Pacific Northwest. At the same time, in the southern hemisphere afternoon rain storms can be seen over much of South America and southern Africa.
As the seasons shift, the northward movement of the Inter-tropical Convergence Zone (ITCZ) can be seen, bringing with it the monsoon season to India and much of the east. At the same time the US hurricane season begins. These more local events can be seen forming in the Atlantic Ocean and getting pushed towards the East Coast of the US, occasionally making land fall and bringing rain. +
R
This is a local news clip from Koat News, Alberquerque, New Mexico. It documents the damage that the small town of San Francisco sustained due to the flooding of the Rio Puerco in September 2013.
The Rio Puerco is a tributary to the Rio Grande in New Mexico. It is a dryland river and has streamflow only when there is major rain fall in its drainage area. In September 2013 an exceptionally high water occured, and the Rio Puerco overtopped its arroyo system and broke a levee.
The water ran into farm fields and damaged homes and local roads. One resident shows the water level rose over 2ft in his house. +
L
This is a mission statement of LOICZ, land-ocean interactions in the coastal zone. LOICZ is an international organization working on policy making for the coastal zone worldwide. +
C
This is a model coupling experiment where a simple block of uplifted sediments eroded by Child are pass off to SedFlux within the CMT environment. +
P
This is a movie of sea ice pushing up the small drillling island Oooguruk on June 23rd, 2009. Oooguruk is man-made, it is located just offshore the Colville delta along the Beaufort Sea of Alaska.
The island was constructed as a base for a drill platform in 2006, it sits in ~4-5 ft of water depth. Its sides are at least 4,5m above sea level and even up to 9m.
The process is called ice encroachment; both due to 'ride-up' and 'pile-up'.
The ice blocks are over 4-5m, the gravel bags armouring the island can be seen, those are larger than 2 m. The ice pushes itself higher up against the side of the island. The ice push results likely from far-field movement. Nearshore sea ice in this region stayed well into July 2009, but movement of the ice already starts much earlier. +
