6.4.10 Infiltration berm & retentive grading
6.4.10 Infiltration berm & retentive grading
An Infiltration Berm is a mound of compacted earth with sloping sides that is usually located along a contour on relatively gently sloping sites. Berms can also be created through excavation/removal of upslope material, effectively creating a Berm with the original grade. Berms may serve various stormwater drainage functions including: creating a barrier to flow, retaining flow and allowing infiltration for volume control, and directing flows. Grading may be designed in some cases to prevent rather than promote stormwater flows, through creation of "saucers" or "lips" in site yard areas where temporary retention of stormwater does not interfere with use.
Structural BMPs
- Volume/Peak Rate Reduction by Infiltration BMPs
- 6.4.1 Pervious pavement with infiltration bed
- 6.4.2 Infiltration Basin
- 6.4.3 Subsurface Infiltration bed
- 6.4.4 Infiltration trench
- 6.4.5 Rain Garden/bioretention
- 6.4.6 Dry well/seepage pit
- 6.4.7 Constructed filter
- 6.4.8 Vegetated swale
- 6.4.9 Vegetated Filter strip
- 6.4.10 Infiltration berm & retentive grading
- Volume Peak Rate Reduction BMPs
- Runoff Quality/Peak Rate BMPs
- Restoration BMPs
- Other BMPs and related Structural Measures
