8,255
edits
Changes
Jump to navigation
Jump to search
mLine 1:
Line 1: + + Line 8:
Line 10: + + + + + + + +
no edit summary
This article discusses the determination of a suitable infiltration rate to describe the native soils surrounding a proposed infiltration practice. It does not relate to the hydraulic condcutivity or permeability of filter media or planting media used within relevant BMPs.
{{TOClimit|2}}
The design infiltration rate (''f''') is used in all sizing calculations for [[bioretention]] and [[bioswales]], [[dry ponds]], [[infiltration trenches]] and [[infiltration chambers|chambers]], and [[exfiltration trenches]]. It is related to, but not synonymous with 'permeability', 'field hydraulic conductivity' (''K<sub>fc</sub>''), or 'saturated hydraulic conductivity' (''K<sub>sat</sub>''). Before application a safety correction factor (''SCF'') is incorporated into the figure, depending upon the source of the raw data, and the risk of failure of the finished practice.
The design infiltration rate (''f''') is used in all sizing calculations for [[bioretention]] and [[bioswales]], [[dry ponds]], [[infiltration trenches]] and [[infiltration chambers|chambers]], and [[exfiltration trenches]]. It is related to, but not synonymous with 'permeability', 'field hydraulic conductivity' (''K<sub>fc</sub>''), or 'saturated hydraulic conductivity' (''K<sub>sat</sub>''). Before application a safety correction factor (''SCF'') is incorporated into the figure, depending upon the source of the raw data, and the risk of failure of the finished practice.
! On site testing methods
! On site testing methods
! Off site testing methods
! Off site testing methods
! '''Unacceptable methods'''
|-
|-
|
|
*Guelph permeameter
*Guelph permeameter
*Double ring infiltrometer
*Cased borehole (percolation test)
|-
|
|
*[[Grain size analysis]] (Hazen)
*[[Grain size analysis]] (Hazen)
|-
|
*Single ring infiltrometer
*Soil textural classification
|}
|}