Web30 jun. 2012 · Connect the two stakes with a tight string with a level attached to it so that the string is perfectly level. Measure the length of the string. This is your “run.”. The “Rise” is … WebMinimum hydraulic 9 minutes 9 minutes residence time ... > short grass heights Plate 9-3: Detail of a swale check dam Plate 9-4: Swale level spreader to maintain ... > steep …
Existing Water Quality Grass Swale Identification Protocol
WebSlope on Swale Slope away from Building CB FILE NO.: LOTSTD2012.DGN DDA: LOTSTD2012.DGN SEP 2024 DATE: September 2024 or decorative rock is within 1.5m from the building for grass, compacted soil - Min. 10% for first 2m or 15cm drop when the on-site swale - Min. 0.75% for asphalt, concrete or other hard lanscaping - Min. 1.5% … Web7 apr. 2024 · Step 4: Dig a trench along the marked contour line. Certainly, swales are unique to the landscape they’re used in, so no two swales will be the same shape or … micic tennis
Swales - LID SWM Planning and Design Guide
Web29 dec. 2024 · Slope of swale: The longitudinal slope of a dry swale may vary from 0.5 to 2 percent and will affect the selection of swale type. It is HIGHLY RECOMMENDED that the design engineer consider the expected watershed flow to be conveyed by the swale in … WebA swale can be built where there are existing earth areas (i.e. grass or a garden bed). The start of the swale should be located under the downpipe that you plan to divert. Note – … WebEffective swale slope ≤ 2% Effective swale slope ≤ 1% Media Depth: minimum = 18 inches; Recommended maximum = 36 inches Media Depth minimum = 24 inches Recommended maximum = 36 inches Sub-soil testing (Section 6.2): not needed if an underdrain is used; min. infiltration rate must be > 1/2 inch/hour to remove the … micic michigan