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Living Snow Fence Case Study: Mountain Lake, MN
	Introduction   Snowfall   Wind Direction   Fetch Distance   Snow Water Equiv.   Snow Transport   Porosity   Attack Angle Setback   Conclusions   References The formula to the right uses the attack angle, fence height, and porosity to calculate the setback of the fence. The setback calculated for this case study at Mountain Lake, MN, is 165 ft. (50.2 m).   Formula for Fence Setback D = H (sina) (12 + 49P + 7P2 - 37P3) D is the setback (m). H is the height of the fence (m). sina is the attack angle of the prevailing winter wind striking the road. P is the porosity percentage of the fence.       close this window