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+ | <font size=3>'''Design infiltration rate as a function of soil texture for bioretention in Minnesota'''</font size><br> | ||
− | + | '''The values shown in this table are for uncompacted soils. [https://stormwater.pca.state.mn.us/index.php?title=General_relationship_of_soil_bulk_density_to_root_growth_based_on_soil_texture This table] can be used as a guide to determine if a soil is compacted. For information on alleviating compacted soils, [https://stormwater.pca.state.mn.us/index.php/Alleviating_compaction_from_construction_activities link here]. If a soil is compacted, reduce the soil infiltration rate by one level (e.g. for a compacted B(SM) use the infiltration rate for a B(MH) soil).'''</font size><br> | |
− | Link to this [[Design infiltration rate as a function of soil texture for bioretention in Minnesota|table]] | + | Link to this [[Design infiltration rate as a function of soil texture for bioretention in Minnesota|table]] |
<table class="sortable"> | <table class="sortable"> | ||
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Design infiltration rate as a function of soil texture for bioretention in Minnesota
The values shown in this table are for uncompacted soils. This table can be used as a guide to determine if a soil is compacted. For information on alleviating compacted soils, link here. If a soil is compacted, reduce the soil infiltration rate by one level (e.g. for a compacted B(SM) use the infiltration rate for a B(MH) soil).
Link to this table
Soil texture (USDA classification) | Corresponding Unified Soil Classification | Corresponding hydrologic soil Group (HSG) | Design Infiltration Rate (in/hr) |
---|---|---|---|
Gravel, sandy gravel, and silty gravels | GW – Well-graded gravel or well-graded gravel with sand
GP – Poorly graded gravel or poorly graded gravel with sand |
A | 1.63 |
Sand, loamy sand, and sandy loam | GM – Silty gravel or silty gravel with sand
SW – Well-graded sand or well-graded sand with gravel SP – Poorly graded sand or poorly graded sand with gravel |
A | 0.8 |
Silty sand | SM – Silty sand or silty sand with gravel | B | 0.45 |
Silt loam, loam | ML – Silt
OL – Organic silt or organic silt with sand or gravel or gravelly organic silt |
B | 0.3 |
Sandy clay loam | GC – Clayey gravel or clayey gravel with sand
SC – Clayey sand or clayey sand with gravel |
C | 0.2 |
Clay, clay loam, silty clay loam, sandy clay, and silty clay | CL – Lean clay or lean clay with sand or gravel or gravelly lean clay
CH – Fat clay or fat clay with sand or gravel or gravelly fat clay OH – Organic clay or organic clay with sand or gravel or gravelly organic clay MH – Elastic silt or elastic silt with sand or gravel |
D | 0.06 |