Houston Land Water Sustainability Forum | BNIM Architects | people. innovation. design. Rainwater + Green Roofs

Houston Land Water Sustainability Forum | BNIM Architects | people. innovation. design.

Rainwater + Green Roofs


Benefits of Green Roofs

– Insulating Properties– Absorb Rainwater– Reduce Urban Heat Island Effect– Reduce Outside Noise– Provide Habitat



Retrofit





Unexpected Andropogon Glomeratus


Green Roof






Rainwater Collection






CISTERN VOLUME CALCULATORJefferson City MissouriInput information: Results:

Daily Demand (gallons) 2600 #of shortages 288Cistern volume (gallons) 1000000 (>0) # of shortages/year 11.76

Contributing Area (Sq ft) Runoff Coefficient Avg annual shortage: 227635.6 gallonsArea 1 30000 0.9 Avg annual shortage: 23.97% of demandArea 2 0 0 Avg annual spill: 0 gallonsArea 3 0 0 Avg annual spill: 0.00% of supply

# of spills/year 0.00Stored Shortage Shortage Spill Spill

year month day Prcp Snow Supply Demand Volume Volume Count Volume Count1977 1 1 0 0 0 2600 997400 0 0 0 01977 1 2 0.04 0.5 673.2 2600 995473 0 0 0 01977 1 3 0.01 0.3 168.3 2600 993042 0 0 0 01977 1 4 0.04 0.7 673.2 2600 991115 0 0 0 01977 1 5 0.18 4 3029.4 2600 991544 0 0 0 01977 1 6 0.02 0.9 336.6 2600 989281 0 0 0 01977 1 7 0.13 2.1 2187.9 2600 988869 0 0 0 01977 1 8 0 0 0 2600 986269 0 0 0 01977 1 9 0 0 0 2600 983669 0 0 0 01977 1 10 0.23 3 3870.9 2600 984940 0 0 0 01977 1 11 0 0 0 2600 982340 0 0 0 01977 1 12 0 0 0 2600 979740 0 0 0 0


Cistern volume (gallons) Roof Area (Sq. ft.) Grey water demand (gallons) Grey Water Reduction Roof Runoff volume

reduction

151000 30000 1290 100% 69%

100000 30000 1290 99% 68%

50000 30000 1290 95% 65%

30000 30000 1290 89% 61%

10000 30000 1290 70% 48%

1000 30000 1290 33% 23%


Gray Water and Roof Runoff ReductionMissouri DNR1290 gallon/day demand

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0 20000 40000 60000 80000 100000 120000 140000 160000

Cistern Volume (gallons)

Perc

ent R

educ

tion

Grey Water Roof Runoff


Vertical Green Wall

Documents

Houston Land Water Sustainability Forum | BNIM Architects | people. innovation. design. Rainwater + Green Roofs