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. > > Mark > > Mark E. Capron, PE > Ventura, California > www.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.
