Area Measurements from Site Plans and Introduction to WinSLAMM Analyses

1. Area Measurements from Site Plans and Introduction to WinSLAMM Analyses Robert Pitt Dept. of Civil and Environmental Engineering University of Alabama Tuscaloosa, AL 35487

3. Little Shades Creek Subwatersheds

10. Characteristics of Land Development in Rocky Ridge

32. Summary of Measured Areas • Totally connected impervious areas: 25.9 acres • parking 15.3 acres • roofs (flat) 8.2 acres • streets (1.2 curb-miles and 33 ft wide) 2.4 acres • Landscaped/open space 15.4 acres • Total Area 41.3 acres

33. Stormwater Controls • Biofiltration areas • 52 units of 40 ft by 8 ft • Surface area: 320 ft2 • Bottom area: 300 ft2 • Depth: 1 ft • Vertical stand pipe: 0.5 ft. dia. 0.75 ft high • Broad-crested weir overflow: 8 ft long, 0.25 ft wide and 0.9 ft high • Amended soil: sandy loam

34. Stormwater Controls (cont.) • Wet detention pond • Surface area at pond surface: • 3% of 25.9 paved acres = 0.78 acres • 0.5% of 15.4 unpaved acres = 0.077 acres • Total area: 0.95 acres • Pond areas different depth: • 0 ft 0 acres 4 ft 0.95 acres • 1 ft 0.1 acres 5 ft 1.15 acres • 2 ft 0.3 acres 6 ft 1.25 acres • 3 ft 0.5 acres 7 ft 1.31 acres

49. Runoff Volume Changes

50. Particulate Solids Changes