SEC TION 07 | RAINWATER CALCULATIONS

RAINWATER CALCULATIONS EXERCISE

PORTLAND, OR

Data on annual precipitation provided by Weather Forecast Office in Portland, Oregon

In 10 year period, Portland received 48.15 inches of rain average. Oregon Zoo Education Center primary program is Recreation (Visitor Center) and secondary is Education, so according to the Chart B, Water Use Intensity is the average between Public Assembly (26 gal/sq ft) and Education (15 gal/ sq ft) which brings Oregon Zoo Education Center to (26+15)/2= 20.5 gal/ sq ft of Water Use Intensity. From the calculations in Part 1 we discover that we will get 29.853 gallons of precipitation per sq ft in Portland. We determined that the building program requires about 20.5 gal/sq ft of water use, which means that if we collect stormwater on the site, we will be able to meet the demand for water use.