Appendix 4. Example classification and criteria for assessing the risk of sediment delivery to streams

Risk of sediment	Proximity of stream channel to polygon delivery to streams
	No stream channel in or adjacent to polygon	Minor stream* channel in or adjacent to polygon	Major stream** channel in or adjacent to polygon
Very Low	Gentle to Steep slope
Low		Gentle slope
Moderate		Moderate slope	Gentle slope
High		Steep slope	Moderate slope
Very High			Steep slope
	Slope steepness downslope from polygon to stream channel

* Minor streams are those perennial streams with channel widths that are less than or equal to 1.5m, or any ephemeral stream.
** Major streams are perennial streams with channel widths that are greater than 1.5m.

Note: Perennial streams are defined in this guidebook as any stream where it is reasonably likely that the stream flows after July 15 (during the summer period) in most years.