Geography Reference
In-Depth Information
FIGURE 3.20
The effects of a precipitation gauge on surface wind-flow. In the first case (A) the wind
may tend to speed up next to the gauge since it must travel farther to get around the obstacle.
The lower illustrations (B and C) show that turbulence caused by surface roughness may result
in upflow or downflow at the gauge orifice, depending on its location with respect to surrounding
topography and wind direction. The lee eddy created in each situation is a location of snow and
dust deposition due to slow (reversed) wind speeds. (Adapted from Peck 1972: 8.)
TABLE 3.4
Average Annual Precipitation at Four Ridge Sites in a Transect Up the Front Range of the Color-
ado Rockies during 1965-1970
Snow accumulation in alpine watersheds can be investigated more thoroughly by col-
lecting depth and density data from snow pits, which can be converted to water equi-
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