We’ve also gotten the May 8th dye movie put together. Check out the youtube video or the link to the .mov file below. The dye qualitatively behaves similar to on May 7th (see previous post). However, the dye does not get advected as far downcoast. However, there are a number of coherent structures clearly visible in the dye field. The … Read More
Airborne dye movie from May 7 2012
We’ve been busy processing up the RIVET I data from the New River Inlet, which we will be posting to our ftp site soon. We’ve also been working up the airborne observations (in collaboration with Luc Lenain & the Melville lab). The video below shows a visualization of the May 7th dye release. Animation of repeated airborne passes of the … Read More
Sonar Imagery of bedform movies
Here are the movies from the sonars on our quadpods. I added two new ones with 2-axis pencil beam rotary sonar imagery overlaid on top of the sidescan data to show some actual elevations of the bedforms in a limited region under the frame. https://vimeo.com/album/1988223 And here are the locations of the frames and some boat mounted sidescan:
The waves at New River Inlet are supposed to be below 50 cm later this week. I looked at the waves at the buoy every morning since February. They were bigger the 4 weeks the RIVET sensors were in the water than at any time since February! There were two pre-June tropical storms. When a few of us came to … Read More
5/19/2012 and 5/20/2012 Final Dye Release REMUS Ops
REMUS operations starting ~1.5 hours before max ebb were conducted during the 5/19 and 5/20 dye releases. Conditions were rough during the 5/19 mission outside of the inlet and no dye was visible during REMUS ops. However comparison plots of river Colored Dissolved Organic Matter (CDOM) versus Rhodamine concentrations show that the dye was present, just at low concentrations (~0.5 … Read More
Last SIO drifter releases: May 17
Sorry for the late post, but… Thursday May 17 was the last day of SIO drifter releases. Again weather (rain and potential T-storms) cut the releases short and we only did two releases. Both releases were during ebb tide and were generally similar (thus only the first is examined in detail here) but novel compared to previous releases during ebb … Read More
SWIFT runs complete
Yesterday we completed the final set of SWIFT runs, measuring surface turbulence, waves, winds, and currents through the inlet. Below is the composite of all tracks from 26 Apr to 21 May, color scaled by turbulent dissipation rate. Across all conditions, there is consistent enhanced dissipation at the channel outlets (old and new), as well as over the shoals. Other, … Read More
Dye release Sat May 19th: Balancing Dye Flux
The dye release on Sat 19 May was interesting. 30 gallons of dye were released for 5 hours starting at 0430 (AM!) in approximately 10 m water depth a few meters (3-4 m) above the bed between buoy #6 and #8 in the channel Dye went up the inlet towards the ICW on the flood. Dye that had reached … Read More
Thermal IR visualized flow
The attached video shows a 17 minute series of 10 second averaged images from the thermal IR cameras on the APLUW/OSU tower. Brighter shades indicate relatively warmer temperatures. The high tide was approximately 2 hours prior to the movie. Note the strong northward flow which bends into the inlet and intersects a cooler front in the main channel.
5/16/2012 and 5/17/2012 River Plume Extent Monitoring Missions
Here are the results of two AUV missions performed on 5/16 and 5/17 to observe the offshore extent of the river plume during max ebb using elevated CDOM signatures to define the boundaries of the plume. The 5/16 mission was performed during strong southerly wind conditions (blowing directly into the inlet) while the 5/17 mission was performed during minimal … Read More