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Rain Gardens as Flood Control in Austin, Texas

Rain Gardens as Flood Control in Austin, Texas. By Kiersten Dube. Shoal Creek Detention Pond Q: Can rain gardens replace pond?. Far West Blvd. Shoal Creek. MOPAC. Lidar to DEM. High Low. ArcGIS Help page “ Lidar to raster”. Stream Lines and Flow Accumulation. MOPAC. Far West Blvd.

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Rain Gardens as Flood Control in Austin, Texas

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  1. Rain Gardens as Flood Control in Austin, Texas By KierstenDube

  2. Shoal Creek Detention PondQ: Can rain gardens replace pond? Far West Blvd Shoal Creek MOPAC

  3. Lidar to DEM High Low ArcGIS Help page “Lidar to raster”

  4. Stream Lines andFlow Accumulation MOPAC Far West Blvd AGREE 50 ft 15 ft

  5. Delineate Watershed Far West Blvd Area = 107 acres

  6. Single Family Homes

  7. Revised QuestionCan rain gardens provide flood control for commercial property? Civic Multi-family Office Roads

  8. Assumption Σ cfs = time Rain Gardens Pond Pond Vol = Σ (Rain Garden Vol)

  9. Pond Volume:Cut and Fill Tool Weir DEM Fill Pond Cut Cut Artificial DEM Fill = Pond Vol = 2.06 x 106 cubic feet

  10. Rain Garden Design 4 in. 10 in. 30 in. Soil Porosity = 0.2 Equivalent Storage Depth 1.25 in.

  11. Feasibility Assessment Pond Vol Equivalent RG Depth 57 = = Rain Garden Area Acres RG Area Watershed Area 57 107 = = 53% ? Pervious Cover Per Lot = 56%

  12. Conclusions • Can rain gardens replace pond? • Tentative No • Consider other options • Pervious paving • Roof top gardens • More complex RG designs • Remaining questions • Maintenance • Water quality from roads

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