Creating Forests to Reduce Tsunami Damage #DigInfo


Yokohama National University professor emeritus
Akira Miyawaki, who to date has planted over 40 million trees in 1,700 locations in Japan
and overseas, is continuing his tree planting activities not only in Japan but also on twice
monthly overseas trips. Iwanumi City in Miyagi Prefecture suffered tremendous damage
from the Great East Japan Earthquake. To prepare for the next disaster, Miyawaki is promoting
natural selection through mixed and dense planting of multiple types of trees as he
advocates the creation of forests that do not require oversight. Iwanuma City has incorporated
Miyawaki’s philosophy in establishing the “1,000-year Kibonooka Project” in preparation
for the next disaster. Tide protection forests to date have primarily
consisted of a single type of tree such as red or black pine. But shallow-rooted pine
trees were uprooted by the tsunami and did not serve their purpose. Miyawaki proposed to efficiently use the tremendous
amount of debris created by the disaster as a resource excluding toxic and non-decomposable
material. Sorted debris is mixed with dirt and used to fill dug-out holes to create large
mounds that are further covered with dirt. In planting trees, primary constituent trees
are selected that grow long, deep roots and match the potential natural vegetation of
an area. Three to five saplings of various other vegetation that make up the forest in
addition to the main constituent trees are planted per square meter. This will require
weeding for the first two to three years, but no maintenance is required after that.
Twenty years after the tree planting there will be an abundant forest that will remain
generation after generation until the next ice age predicted to occur in 9,000 years. The forest will function as a green barrier,
and by making the mound high it will also protect against large tsunamis. By reducing
the energy of a tsunami, the mound will reduce the height and speed of the tsunami, thereby
increasing the potential to protect people and property. Pride One Entertainment’s Yasushi Akutagawa, who has expressed interest in Miyawaki’s simple efforts to protect the environment, is thinking
of supporting the forest building movement through film.

67 thoughts on “Creating Forests to Reduce Tsunami Damage #DigInfo

  1. What is this ice age they are predicting and who predicts it? :S

  2. I can't read this title. I'll make one up for you guys. how about "decrepit old man plants trees for fun" great video btw.

  3. I might have, I'm not sure. Either way I think it's silly to predict things so far ahead in time. It's likely to be about as accurate as a weather prediction 5 years ahead of time. Regardless I think it's nice that they're growing trees ๐Ÿ™‚

  4. i like the new more in depth news style presentation with different presenters but i also enjoy the way that the presenters are anonymous celebrity presenters can get very irritating.

  5. but please keep you videos reporting single technology breakthroughs the same though please.

  6. Probably it's because we're close to the end of a 41.000 year cycle of ice ages (the duration of the cycle is estimated from reading percentage of air bubbles with heavier isotopes. Water with heavier isotopes needs higher temperature to evaporate so based on how rich the ice is in those isotopes tells us how hot it was when the ice sheet formed.)

  7. Its Impossible for me to hate this.. this is rather good news!, we need more green arround us..

  8. ่ƒฝๅฐ†ๅฑ…ๅฎ‰ๆ€ๅฑ็š„ๆ€ๅบฆๆ้ซ˜ๅˆฐไบ†ไธ€็ง่ฎฉไบบ้’ฆไฝฉ็š„็จ‹ๅบฆ็š„,ไนŸๅชๆœ‰ๆ—ฅๆœฌไบ†

  9. Go Japan! Do be careful how much you change your eco-system but -yah- trees over concrete, anyday!

    Greetz from the Netherlands

  10. Use a buster call when a tsunami arrives. Aokiji will arrive and freeze the sea water. ๐Ÿ˜€

  11. Well I think that managing a flood is easier that managing a tsunami…

  12. Dont we do this already in Holland? The whole country is almost like 10 meters below sea level.

  13. When they take the saplings out of the pot they're supposed to break up the bottom where roots are a lil so they'll take root easier/faster. Or am i wrong?

  14. This makes sense but this also mean the end of how beaches are today.

  15. probably why they are being planted on a mound, the plants chosen might even have a bit of resistance

  16. not all shoreline are beaches…. many of them are swamp or cliff or even mudland…. this project have a mix concept of swamp and cliff…

  17. flood is less danger as water just rise from bottom, even in flash flood u can still escape easily but when tsunami came, it is a wall of water with power of several nuke rush-in in sec, when u realize it is tsunami u probably be dead oredi…

  18. Sry … but Flash Flood would be the same as dampened tsunami (just repeatedly). Water will not rise from the bottom … it'll come as a big wave (just with less debris).

    Greetz from the Netherlands

  19. Wont the trees become a problem or a weed like the Acacia saligna (Port Jackson willow) in Africa.

  20. A Mound wont stop a tsunami, A tidal surge like the last one would just push its way over the top. Though it will slow it down.

  21. Have they actually run simulations and calculations to verify if it will really work this time instead of just creating a bunch of mud and debris flows towards the "protected" area?

  22. Natural protection of tsunami +
    Eco-friendly man-made forest +
    Memorial site +
    Debris landfill

    That's genius!!

  23. Birth rate in japan is really low and quakes do not get bigger over time, the probability of a big earthquake after a big earthquake is low. All the energy released from the tension of the tectonic plates needs to build up again.

  24. The fact that he doesn't want to even try to green "natural" deserts, is dumb and shows that this plan is influenced by his "humans bad, nature good" religious beliefs. Kinda makes the whole thing a little suspicious, can we get another plan that's based on science instead pls?

  25. Well since he's the scientist and your random person #2138487273 on Youtube, I think we'll assume that he's done extensive research on the subject and came to this conclusion objectively. On the topic I have to wonder if you really think a single tree, or a forest of saplings will survive a sandstorm or extreme temps. Also, where did you get religious beliefs out of this video?

  26. But to reduce the speed it gonna require something with enough Strength to hold and withstand it, which yeah they said they were gonna make that, but as more and more waves come, the build will go slowly deteriorating. so in that case they are gonna need a crew on work after every tsunami.

  27. Huh? His plan is based in so much science you are probably not even aware of. Firstly it's a brilliant way of keeping out the waves but it's a lot more. If they just constructed a massive concrete wall, it would make people depressed (yes there are countless scientific studies) and it would be very expensive. By building/planting trees, it is cheap to build, it can be easily repaired and it would lower depression. He is tackling 2 in 1. As well as it being a monument for "hope" or "future".

  28. And besides, concrete weathers quite rapidly when left out in the open and once plants get hold of it.

  29. Even then the mound will already be there, even if he trees aren't fully grown. But you see, these kind of problems can't be solved instantaneously if you want to make them last long – up to hundreds of years. And the likelihood that a large tsunami will hit the same region and that the waves will come from the same direction twice within 20 years is relatively low – which, admittedly, is not to say impossible. But do you have a better long-term solution? ๐Ÿ™‚

  30. I do not suggest planting a single tree, or forest of SAPLINGS into a desert. Gradual changes to a biome work best, shit takes planning yo.
    I assume his biases are Shinto in origin… probably because like a lot of people i have a cursory knowledge of world religions, their associated cultural baggage, and common human cognitive biases.

  31. Oh i agree it's nice. I just wonder if it could be even nicer if it was designed by someone with different priorities.

  32. The forest of saplings 'would' be the gradual process. Fact is aside from being too loose for plants in some natural desert regions, or the ground being too solidly packed from heat/cold, many deserts simply wouldn't be able to sustain large plant populations without help for various reasons. Likely his thoughts on the subject are more practical than religious. Besides, despite being an animism system worshiping points in nature if Shinto was as you say japan wouldn't be so over industrialized.

  33. If ANY culture promotes the value of science is the Japaneses Culture They don't believe that the universe is created from a god. School are 6 days a week and heavy curriculum in math/science.

  34. Well i dont know if this counts but sometimes i have "visions of the future" and that idea will keep forward, and will be implemented, dont know it its on japan, but in other cities too, and it will fail at least in one of them. I could see the water coming from the "forest"

  35. His thoughts ARE more practical than religious, yes. It's still clearly (imho) there though.
    Japan is merely influenced by Shinto, not a living embodiment of it. And likewise with the video dude's tsumani barrier plan.
    This isn't a black & white, all or nothing thing.
    No offense but i wouldn't hire you personally to come up with plans to green deserts, you don't seem to have the drive & imagination for it. Dude in video is ok, but plan could have been better if not held back by nature worship

  36. ps: the forest of saplings (reminder: we are talking about greening deserts here, not mounded-up tsunami barriers in non-desert areas) probably still wouldn't be gradual enough to survive… needs MOAR gradual. Probably best not rush straight to forest, but gradually increasing density of grasslands first, coz desert soils have like ZERO organic matter :(.
    iamnotanexpertinthesematters.
    but video-dude is not even trying: "deserts? nope, that's holy land. nope. nope nope."
    fuck that noise

  37. There's animals who need "natural" tsunamis too. Hell, there's plenty of organisms that can only survive by killing humans, i can think of a bunch of parasite species to be wiped off the face of the earth coz we don't respect their "habitat".
    WON'T SOMEONE THINK OF THE PARASITES?
    You literally can't throw a rock without destroying a habitat, lets get real here. Being violently torn apart by majestic lions is nature's way – yet we're all glad lions don't roam our streets like they used to

  38. Using debris as compost basically. ใจใฆใ‚‚ ใ“ใ‚Šใ“ใ† ใงใ™ใ‚ˆ. ^_^

  39. Your concept is wrong. Plants grow extremely well with only anorganic matter. If you look at the manufactured fertiliser, there is no or very least amount of organic matter, yet it grows plants better than organic fertiliser.

    About the desert, I would agree with those video-dude. The main goal of this project is to utilise plants to block disaster such as tsunami, so there is no point in trying make a desert green. Instead, it has to be done at beaches in order to block tsunami.

  40. Organic matter tends to contain nutrients itself, but more importantly it tends to trap any added nutrients preventing them from leaching, and slowing their absorption into plants (preventing fertilizer burn). Combining fertilizers with carbon slows their release.
    You are right it doesn't need to be organic, AFAIK you can just add pure carbon, who cares where it's from, carbon is carbon is carbon. Organic sources are merely convenient.

  41. mangroves along the coast, and irrigation banks behind the mounds would make iit even better,.

  42. Brilliant!
    Now they just have to quit nuclear power!!! But there is too much money involved…

  43. 5 years and not a single dislike on this video. this restored my faith in humanity for a while. thank you!

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