Location Name: Andrews Watershed 3 (Reach WS3) - WS3

Parent: Andrews Watershed 3 - WS03

Bounding Coordinates (decimal degrees):

North: 44.21750000

South: 44.21910000

East: -122.23833000

West: -122.24111000

Elevation (meters):

Minimum:   488

Maximum:   536

Slope (%):   12.60

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Site History:

Repeated scouring by debris flows, most recent was 1996

Landform:

· Single thread channel, pool riffle bed form · Reach length = 306.4 m · Average stream gradient = 12.6% · Average sinuosity* = 1.13 m/m * Sinuosity was calculated as the thalweg length divided by the straight-line distance along the valley axis for each reach.

Soils:

Coarse Sands, coarse and fine Gravels, Cobbles, and Boulders

Geology:

Constrained valley with medium sized alluvial deposits, deeper alluvium accumulating behind old log jams.

Hydrology:

Approximate basin area = 100 hectares, Average stream flow over test period = 27.2 liters per second

Vegetation:

Forested, predominantly Douglas fir, and alder stands

Climate:

Mild wet winter, warm dry summer. Average annual precipitation = 223 cm