¥Impervious surface can channel water and nutrients into the lake
–Paved and camp roads
¥1.1% of watershed land area in 2005
¥
Roads play an important role
in lake health (Davis et al. 1978).Their impervious nature can directly affect runoff qualities and
quantities, by channeling water toward or away from the lake.This allows a small land use area to
contribute disproportionately to phosphorus loading in a water system.
The total area for the 2003
map was calculated by measuring the roads during a road survey (see Watershed
Development: Road Survey).While
this survey was conducted in 2005, it was assumed that the roads and their
respective areas did not change significantly over those two years. Road data
could not be obtained from the 1965 aerial photographs.
Depending on the quality of
the roads, 1.1% of watershed land cover may contribute a significant amount
of pollution into nearby groundwater
