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→LID design adaptations on low permeability soils
The rationale for variations in practice design for sites with fine textured soils is based on the relationship between hydraulic head and infiltration.
The rationale for variations in practice design for sites with fine textured soils is based on the relationship between hydraulic head and infiltration.
As the head pressure in the Caledon infiltration trench decreased from 1.5 m to below 1 m, infiltration rates dropped from 2.5 - 3.8 mm/h during the first two days to only 1 - 1.5 mm hour after six and half days.
As the head pressure in the Caledon [[infiltration trench]] decreased from 1.5 m to below 1 m, infiltration rates dropped from 2.5 - 3.8 mm/h during the first two days to only 1 - 1.5 mm hour after six and half days.
Infiltration is enhanced by maintaining a hydraulic head above the point at which infiltration slows to negligible levels.
Infiltration is enhanced by maintaining a hydraulic head above the point at which infiltration slows to negligible levels.