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==Overview==
==Overview==
Gently sloping, densely vegetated areas that are designed to treat runoff as sheet flow from adjacent impervious surfaces. Filter strips function by slowing runoff velocities and filtering out sediment and other pollutants, and by providing some [[infiltration]] into underlying soils. Filter strips may be comprised of a variety of [[trees]], [[Shrubs:List|shrubs]], and vegetation to add aesthetic value as well as water quality benefits.
Gently sloping, densely vegetated areas that are designed to treat runoff as sheet flow from adjacent impervious surfaces. Filter strips function by slowing runoff velocities and filtering out sediment and other pollutants, and by providing some [[infiltration]] into underlying soils. Filter strips may be comprised of a variety of [[trees]], [[Shrubs:List|shrubs]], and vegetation to add aesthetic value as well as water quality benefits.
{{:Filter strips: TTT}}
{{:Filter strips: TTT}}
==Performance==
Vegetated filter strips are primarily a practice used to achieve water quality improvements although some [[infiltration]] can occur, depending on the soil type and infiltration rate.
{| class="wikitable"
|+ Ability of vegetated filter strips to meet SWM objectives
|-
!Water balance benefit
!Water quality improvement
!Erosion control benefit
|-
|Partial: depending on soil infiltration rate
|Partial: depending on soil infiltration rate and length of flow path over the pervious area
|Partial: depending on soil infiltration rate
|}
----
[[Category:Green infrastructure]]
[[Category:Green infrastructure]]
[[Category: Pretreatment]]
[[Category: Pretreatment]]