1. Water Sustainability in Cities
Unit 6: Rainwater Harvesting
RWH Sizing Exercise Overview

2. Cistern Sizing Exercise

3. Available Roof Area
190 ft
54 ft
135 ft
100 ft
72 ft
40 ft
How much rainwater can be collected and used from the 28,288 ft2 CME roof?

4. Monthly Water Supply
See Spreadsheet

5. Monthly Demand
See Spreadsheet

6. Monthly Water Balance
See Spreadsheet

7. Discussion
Work with a partner and make a list of reasons (a) why and (b) why not rainwater harvesting is more sustainable than piped-in water supply.
Why
Why Not
Reason 1
Reason 2 …
Reason 1
Reason 2 …
Write on board