Andrew,True. The tsunami wall is for stopping the tsunami from hitting shores protected by the wall, not for stopping the subsea landslide.The only sure way to prevent more global warming caused subsea landslides is to reduce atmospheric CO2 concentrations below about 1960s levels. That could be done before 2100, if we put substantial effort into Ocean Seaweed Forests.Mark E. Capron, PEVentura, Californiawww.PODenergy.org
Original Message
Subject: RE: [geo] Off topic? Tsunamis caused by AGW
From: Andrew Lockley <andrew.lock...@gmail.com>
Date: Sun, June 08, 2014 10:34 am
To: markcap...@podenergy.org
Cc: geoengineering <geoengineering@googlegroups.com>
The volume of these underwater landslides are completely beyond the scale you're discussing. The slide that wiped out doggerland was comparable to the land area of a small country. You can't use sandbags to stop that. A On 6 Jun 2014 22:22, <markcap...@podenergy.org> wrote: Andrew,Actually, underwater earthworks may not be that expensive, if you employ the principles of "hydrostatic sand". To make hydrostatic sand you: 1) Place a plastic bag in the water; 2) fill the bag with sand (this may be a hydropneumatic fill); 3. Seal the bag; 4) Pump the water out of the bag. The deeper the bag, the more confining pressure on the sand, more confining pressure makes the sand like concrete. The attache PDF is a summary of a collection of recent provisional patent applications. (They are interrelated with explanations of components distributed in several Concepts The sub-sea sea wall is explained in Concept 3. People haven't been thinking of putting the tsunami barrier out in deeper water. But if we make a sub-sea wall, the tsunami is not as high. A lot of the tsunami will reflect. Suppose a tsunami is 1 meter high in 4,000 meter deep water. It would be 3 m high in 50 m deep water or 8 m high in 1 meter deep water. (Very roughly.) Item 3 shows how to temporarily extend the sub-sea wall above the water surface. MarkMark E. Capron, PE Ventura, Californiawww.PODenergy.org Original Message Subject: [geo] Off topic? Tsunamis caused by AGW From: Andrew Lockley <andrew.lock...@gmail.com> Date: Thu, June 05, 2014 10:25 am To: geoengineering <geoengineering@googlegroups.com> See attached paper postulating risks from underwater slope failure/slumping caused by AGW in North Sea. Risk management could be considered adaptation, but the possibility of catastrophic tsunamis (previously 20+m over MSL in Shetland Islands during LIG) suggests it may fall into GE, but obviously not at a global scale. Underwater earthworks seem impractical on the scale needed, so I'd be interested in any further thoughts or ideas. A -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.-- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
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