Williams River

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Record: 49 Segment ID: T5.S3.02- Stream Name: Andover Brook

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Stream Channel
2.1	Bankfull Width	42 ft.
2.2	Maximum Depth	2.5 ft.
2.3	Mean Depth	1.7 ft.
2.4	Floodprone Width	53 ft.
2.5	Recently Abandoned Floodplain	6.5 ft.
	Human Elevated Floodplain	ft.
2.6	Width/Depth Ratio	24.7
2.7	Entrenchment Ratio	1.3
2.8	Incision Ratio - Redently Abandoned Floodplain	2.6
	Incision Ratio - Human Elevated FloodPlain	0.0
2.9	Sinuosity	Low
2.10	Type of Riffles	Sedimented
2.11	Riffle/Step Spacing Distance	120 ft.
2.12	Substrate Composition
	Bedrock	0.0 %
	Boulder	6.0 %
	Cobble	56.0 %
	Course Gravel	17.0 %
	Fine Gravel	21.0 %
	Sand	4.0 %
	Silt and smaller	0.0 %
	Clay Present?	Yes
	Percent Detritus	3.0 %
	Large Woody Debris Count	67
2.13	Average Largest Particle On
	Bed	280 mm
	Bar	160 mm
2.14	Phase 2 Stream Type
	Stream Type	F
	Bed Material	Cobble
	Subclass Slope	None
	Dominant Bed Form	Riffle-Pool
	SubDominant Bed Form
	Field Measured Slope
	Phase 1 Stream Type
	Stream Type	B
	Dominant Bed Material	Cobble
	Subclass Slope	c
	Bed Form	Riffle-Pool
	Sub-reach Stream Type
	Reference Stream Type
	Reference Bed Material
	Reference Subclass Slope
	Reference Bedform
	Were Channel Dimensions Significantly Changed By Major Flooding	Yes
	Were channel dimensions significantly changed by human alteration associated with flood recovery efforts (e.g., reshaping of banks by yellow machines)?	No
	Channel Enlargement	26 %
	Comments	We measured two cross-sections for this reach to characterize the variability between floodplain access. Most of the reach was F-type with limited floodplain access for the widened and incised channel. Several locations, typically on bends away from the road, had an actively aggrading bed filling the widened channel and allowing for frequent access to a large forested floodplain.