Stormwater Calculator_2017
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Student Portfolio Item
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Schoolyard Stormwater Mixing Thermal Calculator
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To calculate runoff volumes and estimate final runoff temperature for rain events
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ENTER INFO IN THE
GRAY
FIELDS
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This worksheet designed with Cover Types specifically for:Walkersville
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STUDENT GROUP:
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Total Schoolyard Area (acres):
Rain Event Volume (Inches):
Rain Event Date:
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#1 HOTTEST RUNOFF LOCATION
#2 HOTTEST RUNOFF LOCATION
#3 HOTTEST RUNOFF LOCATION
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Enter the data with the HIGHEST runoff temperature.
Enter the data with the 2nd HIGHEST runoff temperature.
Enter the data with the LOWEST runoff temperature.
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Catchment Area 1 (Name):
parking lot
Catchment Area 2 (Name):
tennis court
Catchment Area 3 (Name):
bldg roof
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Runoff temp (degrees C):
24.5
Runoff temp (degrees C):
21.4
Runoff temp (degrees C):
21.3
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Pervious (OS B) (#acres):
Pervious (OS B) (#acres):
Pervious (OS B) (#acres):
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Pervious (OS C) (#acres):
Pervious (OS C) (#acres):
Pervious (OS C) (#acres):
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Impervious(#acres):3.27Impervious(#acres):0.64
Impervious(#acres):
5.99
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Size (acres):3.27Size (acres):0.64Size (acres):5.99
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Runoff Volume(1)121.12(ft3)Runoff Volume(2)23.71(ft3)Runoff Volume(3)221.87(ft3)
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Volume (gal)Volume (ft3)Mass (kg)Estimated Temp(oC)
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Catchment 1 & 2 ONLY Combined:
1,086.2144.84,101.624.0
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Catchment 2 & 3 ONLY Combined
1,841.9245.66,954.821.3
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Total Combined (1, 2, &3):
2,750.3366.710,385.122.4
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Do not touch these.
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For use to calculate runoff volumes and estimate final runoff temperature for each rain event
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This worksheet designed with Cover Types specifically for:
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Do not remove these "Items"
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Directions:
Total Schoolyard Area:
acres
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Enter data for each field in gray
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STUDENT GROUP: (enter student names)
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Rain Event Date:
Rain Event Volume:
inch(es)
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Enter the data for the catchment area with the HIGHEST runoff temperature.
Runoff Temp:
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CATCHMENT AREA 1NAME:Size: acres24.5oC
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Cover Type*Soil AreaArea CN (from TR-55)SQ Runoff(1)Runoff Volume(2)Runoff Mass
Do not remove these "items"
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Type(acres)(sf)(in)(ft3)(kg)
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Open SpaceB0616.40.31967213110.000.00
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Open SpaceC0743.50.17567567570.000.00
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ImperviousN/A3.27142441.2980.200.01020408163121.123430.22
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Catchment 1 TOTAL:N/A3.27142441.2N/AN/AN/A121.123430.22
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Enter the data for the catchment area with the SECOND HIGHEST runoff temperature.
Runoff Temp:
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CATCHMENT AREA 2NAME:Size:0.64 acres21.4oC
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Cover Type*Soil AreaArea CN (from TR-55)SQ Runoff(1)Runoff Volume(2)Runoff Mass
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Type(acres)(sf)(in)(ft3)(kg)
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Open SpaceB0616.40.31967213110.000.00
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Open SpaceC0743.50.17567567570.000.00
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ImperviousN/A0.6427878.4980.200.0102040816323.71671.36
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Catchment 2 TOTAL:N/A0.6427878.4N/AN/AN/A23.71671.36
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Enter the data for the catchment area with the LOWEST runoff temperature.
Runoff Temp:
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CATCHMENT AREA 3NAME:Size:5.99 acres21.3oC
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Cover Type*Soil AreaArea CN (from TR-55)SQ Runoff(1)Runoff Volume(2)Runoff Mass
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Type(acres)(sf)(in)(ft3)(kg)
Do not remove these items.
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Open SpaceB0616.40.31967213110.000.00
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Open SpaceC0743.50.17567567570.000.00
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ImperviousN/A5.99260924.4980.200.01020408163221.876283.49
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Catchment 3 TOTAL:N/A5.99260924.4N/AN/AN/A221.876283.49
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Volume (gal)
Volume (ft3)
Mass (kg)
Estimated Temp(oC)
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Catchment 1 & 2 ONLY Combined:
1,086.2144.84,101.624.0
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Catchment 2 & 3 ONLY Combined:
1,841.9245.66,954.821.31
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Total Combined (1, 2, &3):
2,750.3366.710,385.122.36
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