Thanks all.. RETIRED13, some input on your very helpful calcs..
The weight you say is in kN, is that just a transformation from metric tons?
You say the riverbed consists of silt loam, but what we see at the site the surface under the boulder is big 300 to 500 kg rocks forming a very rough...
ok.. so the surface of the river will move much faster than 2.9? It would be great with a video of a river that moves in this speed at the bottom.. [smile]
retired13... THANKS!!!
Would it be possible for you to post the values you used? The coefficient 0.55 is for a flat dry rock surface on both the floor and the boulder. I have no other info on coefficients.
Retired13.. thanks for a good formula!! Some questions...
V - velocity (m/s)
This is the velocity of the water as I understand it?
ρw - density of water (kg/m3)
I will find.
A - horizontal project area of the rock (m2)
Is this the total "flat" area facing the waterflow? Not counting for the...
What we now from geologists, is that the glacier could not have placed the boulder at its present location, as the overburden under it (the riverbed rocks) accumulated after the glacier was gone.
Hi. Thanks for all your answers. As LittleInch says, more details are needed. I have attached a Google maps image and some more photos here where the location of the boulder is. I appreciate all info and evaluations on wither the river could in fact move the boulder to its present location. Some...
ok.. thanks for all the input but let me re-phrase the question...
We know it will take 9.6 metric ton-force to get the boulder moving if it had a flat underside and the riverbed was also flat (friction coefficient 0.55). We calculated this. So the question is, what kind of speed does the river...
The boulder does not bother me.. it is a very nice boulder. I know the landowners beside it and they are trying to get to know more about the area. There is a possible X cut into the shore-side of the boulder and people say the boulder is too big to be moved by the river.
We just want to get an...
We don't need to remove it, we just need to figure out how it got there as this is a 19th-century mining area in general. Either it's put there by man (4 oxen would move it), or by the river. It is unique to the area of the river. No such large boulders exist here and the river is shallow.
Hi. For environmental purposes, we need to calculate the minimal water/ice SPEED needed from the river to be able to move this large boulder laying on top of the rocky riverbed. The river is in Canada and fed by rainwater only. This is a non-profit project. Please advise on a formula to use.
It...
