Analysis starts with good data. Finding a weather station location that is close is instrumental in understanding rainfall patterns. Here are tools we use to collect that data. We then plug it into our own tool, combined with a water budget on irrigation and household use and tank storage volume and produce a series of options.
Useful Tools
Environment Canada Weather Data
Tools – Links
We refer to use our own tools when performing an analysis, but for starters there are useful links to peruse.
American Rainwater Catchment Systems Association calculator page
Rainwater Harvesting for Drylands and Beyond – Brad Lancaster
Rainwater Harvesting 