On Monday, February 19, 2024 at 3:19:28?PM UTC-6, John Larkin wrote:
It's raining and blowing. The house is shaking and trees are falling
here and there. There are signs on US101 that say DON'T DRIVE. GO
HOME. I stepped out onto the deck and liked to get blown off.
And the sun is shining.
https://www.ventusky.com/san-francisco
Did you have a reasonable warning time?
On Monday, February 19, 2024 at 7:05:54?PM UTC-5, John Larkin wrote:excess of a stable angle of repose, the kind of failure responsible for 'slides.' Big trees are held steady against strong winds by an extensive system of surface feeder roots, which can greatly exceed the span of the dripline by a factor of 10x. Deep
On Mon, 19 Feb 2024 14:38:50 -0800 (PST), Dean
<hoffma...@gmail.com> wrote:
On Monday, February 19, 2024 at 3:19:28?PM UTC-6, John Larkin wrote:The weather on the west coast is chaotic, with the atmospheric rivers
It's raining and blowing. The house is shaking and trees are falling
here and there. There are signs on US101 that say DON'T DRIVE. GO
HOME. I stepped out onto the deck and liked to get blown off.
And the sun is shining.
https://www.ventusky.com/san-francisco
Did you have a reasonable warning time?
wrything like snakes. The forecasts change hourly and are still
usually wrong. But there have been predictions of violent weather for
a couple of days.
The land is fragile here, seismically young, with a thin layer of soil
over rock, and shallow-rooted non-native trees ready to topple over
with a bit of rain and wind. The eucalyptus are killers.
Can't help but laugh when people think trees and shrubs will prevent landslides. They help with surface erosion but do nothing to anchor 30 ft deep soil saturated with enough moisture to reduce internal shear friction to the point of being well in
The eucalyptus trees introduced by wannabe horticulturalists from Australia, who didn't know what they were doing, are the worst threat. In their native land, they grow on rocky steeply sloped terrain in soil that's nutrient depleted, meaning they staysmall to mid-sized. But in the nutrient rich California soil they grow to enormous size and are extremely heavy.
Check Youtube for "Pacifica drone." Camelot, our favorite fake British
pub, will fall into the ocean eventually. They have Harp and
Boddington on tap and you can get fried oysters instead of fish with
your chips.
It's all the same, all the seafood species will be extinct soon. So the fake pub can slide into the ocean and decompose with the rest of dead and dying.
It's raining and blowing. The house is shaking and trees are falling
here and there. There are signs on US101 that say DON'T DRIVE. GO
HOME. I stepped out onto the deck and liked to get blown off.
And the sun is shining.
https://www.ventusky.com/san-francisco
On Thursday, February 22, 2024 at 2:05:48 AM UTC+11, Fred Bloggs wrote:With few exceptions, most flora is comparatively shallow rooted.
On Tuesday, February 20, 2024 at 9:57:56 PM UTC-5, Anthony William Sloman wrote:
On Wednesday, February 21, 2024 at 4:18:03 AM UTC+11, Fred Bloggs wrote: >> > > On Tuesday, February 20, 2024 at 11:00:05 AM UTC-5, Anthony William Sloman wrote:
On Wednesday, February 21, 2024 at 2:17:20 AM UTC+11, Fred Bloggs wrote:
On Monday, February 19, 2024 at 7:05:54 PM UTC-5, John Larkin wrote:
On Mon, 19 Feb 2024 14:38:50 -0800 (PST), Dean
<hoffma...@gmail.com> wrote:
On Monday, February 19, 2024 at 3:19:28?PM UTC-6, John Larkin wrote:
<snip>
Problem is the urban environment doesn't allow that kind of shallow lateral development as roots are blocked from expanding by houses, sidewalk, roads, and what have you, so big trees blow over, fall on houses, parked cars, and power lines.
of limbs and trunk make the tree stronger and more resistant to damage. Wind exposure doesn't need to be constant. Poplars are fast growers, so my guess is there was too much growth occurring between hardening wind events, causing them to fail when theThere wasn't much to inhibit the lateral development of the roots systems of any of the four poplars involved. These were big - four bedroomed - houses on even bigger blocks.
If the tree is 100 ft tall, it would not be unusual to see lateral root spread out beyond 100-200 ft from the base. Another, and common, vulnerablity is lack of wind exposure during the tree's formative years. Wind exposure and the resulting flexing
Wrong. Poplar are softwoods, and they don't spend much energy on synthesising fungicides. All four trees blew over because the trunk had rotted, as they frequently do.
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