Geography 327      Hydrology


interception loss
that part of the precipitation on the canopy that doesn't reach the ground, because it evaporates from the canopy (canopy interception loss) and from near-ground plants and leaf litter (litter interception loss) or, to a lesser extent, is absorbed by plants

Controls on interception rate, capacity and loss

vegetation characteristics

  1. growth form: trees, shrubs, grasses, forbs

  2. plant density

  3. plant structure: number, size, flexibility, strength and pattern of branches; texture, surface area and orientation of leaves
  4. plant community structure

meteorological factors

  1. precipitation intensity

  2. precipitation duration

  3. wind speed

  4. type of rainfall: rain versus snow

  5. precipitation frequency

horizontal interception

Significance of Interception and Interception Loss

By how much does interception loss reduce inputs to the basin hydrological cycle?

Summary - importance of interception

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