Beach Morphodynamics
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- čas přidán 22. 07. 2024
- Educational video regarding beach morphodynamics, such as long shore drift, erosion and accretion. Presented in this video are the various ways that humans have dealt with these processes and the effects of our efforts.
This is a short video I created for my marine ecological processes class.
Enjoy!
Very comprehensive video. Thank you for sharing!
Add to (mitigatable) side-effects of beach "renourishment":
Shark attacks via
1) direct access channels (esp to areas between "sandbars"), and
2) bait-fish populations created near recent dredging
All beach replenishment research MUST also study the effects on the sand-donor sites, and also effected water currents.
Awesome content!! I just love how this video illustrates the interrelatedness of thw classroom activities and human activity. Well Done!!! Got yourself a new subscriber!!
great content. I subscribed to the channel. (but .. did the narrator say "exasperated" when she meant to say exacerbated?") LMAO
Thanks for this. I would like to know of some of the techniques that you suggest at the end of the presentation that would be relevant for tropical beaches, to protect these from sea level rise. Thank you.
sensible report
👍
All makes sense, we didn't have much in the past.
I grew up near a beach that has timber groynes (not a solid wall a gap between each beam then some cross beams) and were specifically engendered to allow a certain rate of sediment drift... Built a long while ago, they thought carefully about avoiding erosion ect. They're fascinating, sometimes they are almost buried others times they emerge like 12ft high.
As it happens they just buried a whole section of them, piled up a load of sand with blunt force, really sad and a bit pissed off about it really, pretty simplistic and uninspired method, very disruptive. Only predicted to last up to 20 years whereas the previous groynes lasted 60 or so years much of which are still somewhat sturdy and serviceable in some areas.
Be nice to see something built in such a way to protect the coast and aid ecological diversity. I always imagined kind of stepped or alcoved kind of groynes that could grow seaweed to crop on some areas and would provide habitat around others.
You couldn't build them out of timber in the same way today as its too much expensive timber that's getting a lot rarer these days, I wonder if you could use super compressed waste plastic like they can make railway sleepers out of these days. Should look similar aesthetically, probably very erosion resistant and much better than it ending up floating around the sea in fluffy packet, bottle or straw form, should be very hard to break up badly.
This video just shows the blunt wall version of a groyne... Well people have known better than that for a long while now so...then they will still just bung loads massive rocks or smack tonnes of sand as its kind of the simplest thing to do... :( Not so much a grand idea or ambition to bring people together really, just keeping things where they are paying a handful of workers to drive there barges and bulldozers around like there's any shortage of things for them to be doing... Oh well.
imo we should send all plastic to space because the abrasions of plastic used in the environment could contaminate with microscopic plastics into the water
@@Fish-cj4ub To be fair that does occur to use like I suggested, no escaping the abrasions on a beach. I wonder how you could encase it somehow in something really resistant. Not viable to send junk to space, cost of sending any amount of weight to space is very high. I definitely think plastic should be reduced and what there already is should be compressed to reduce surface area so contamination is mostly prevented when it's put to one side out the way.
@@leifcian4288 We cant build the world out of plastic and every piece of plastic ever created still exists on planet earth. The transport of plastic dumps and contaminates the ocean with plastic whether we use it for permanent eco friendly solutions or not. We will never see a decrease in plastic unless we destroy it with plastic eating bacteria or send it to space after we already halted production of new plastic. So space is really the only viable option imo. Just send it on a one way trip. or into the sun?
@@Fish-cj4ub I understand that it's needs to be reduced. But there's is very quickly a big difference in surface area with how compact the remaining plastic is, it's a very simple operation to compress loose plastic and then the rate of particular contamination is exponentially reduced. Leaving the earth's orbit is really not an activity to be sniffed at though...
@@leifcian4288 Youre very true. The main way we move plastic (when it is ne) is in tiny beads or nurdles, and we only ever compress when recycling or waste managing.
likeit
soft is the best, the construction is a mere noise bother - this gave no reasonable solutions - people are never going to leave the beaches since that is where the money goes since swimming was invented - Find a less harmful way without trying to change human nature . Beaches attract jobs.
I grew up near a beach that has timber groynes (not a solid wall a gap between each beam then some cross beams) and were specifically engendered to allow a certain rate of sediment drift... Built a long while ago, they thought carefully about avoiding erosion ect. They're fascinating, sometimes they are almost buried others times they emerge like 12ft high.
As it happens they just buried a whole section of them, piled up a load of sand with blunt force, really sad and a bit pissed off about it really, pretty simplistic and uninspired method, very disruptive. Only predicted to last up to 20 years whereas the previous groynes lasted 60 or so years much of which are still somewhat sturdy and serviceable in some areas.
Be nice to see something built in such a way to protect the coast and aid ecological diversity. I always imagined kind of stepped or alcoved kind of groynes that could grow seaweed to crop on some areas and would provide habitat around others.
You couldn't build them out of timber in the same way today as its too much expensive timber that's getting a lot rarer these days, I wonder if you could use super compressed waste plastic like they can make railway sleepers out of these days. Should look similar aesthetically, probably very erosion resistant and much better than it ending up floating around the sea in fluffy packet, bottle or straw form, should be very hard to break up badly.
This video just shows the blunt wall version of a groyne... Well people have known better than that for a long while now so...then they will still just bung loads massive rocks or smack tonnes of sand as its kind of the simplest thing to do... :( Not so much a grand idea or ambition to bring people together really, just keeping things where they are paying a handful of workers to drive there barges and bulldozers around like there's any shortage of things for them to be doing... Oh well.
This video is a hoax, mixing a variety of beach environments from tropical to a mid latitude environment whilst preaching beach and current morphology. The natural process will allow them selves to be utilised to strengthen beaches, but it will take intelligent intervention as practised by the Dutch around their coast and the English east coast around Norfolk. Read up on that and then reflect on your comments.
exacerbated not exasperated
Uhmm? Where are the solutions? Also, did you want some cheese with your whining? Best of luck!