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Living Snow Fence Case Study: Gaylord, MN
	Introduction   Snowfall   Wind Direction   Fetch Distance   Snow Water Equiv.   Snow Transport Porosity   Attack Angle   Setback   Conclusions   References The porosity of the snow fence determines fence's snow storage capacity. The table to the right gives the porosity fraction for various snow fences and the resulting snow storage capacity (Qc). Qc is calculated using the formula on the right. For the case study at Gaylord, the porosity for the standing corn was 0.50. Assuming the corn height to be 6.5 ft (1.98 m), the snow storage capacity was 38.2 t/m for each 8-row strip. Therefore, for the two strips, the total Qc is approximately 76.4 t/m.   Porosity Type of Fence Porosity Solid Fence 0.0 Double Shrub Row 0.275 Structural Snow Fence 0.50 Single Deciduous Tree Row 0.70 6-8 Rows Standing Strips of Corn 0.50 Snow Storage Capacity Formula Qc/H2.2 = (3 + 4P + 44P2 - 60P3) Qc is snow storage capacity in t/m. H is the fence height in meters. P is the porosity percentage of the fence.     close this window