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- Location
- The Gorge Area, Oregon
collection_area = area_of_roof + area_of_tankI'm not sure how he gauges the amount of rain other than his experience. He'll comment that we got an 1.25" of rain, and I'll compare to what the acurite says and he's always dead on.
rain_amount = depth_of_tank / (collection_area/area_of_tank)
Once you've calibrated the tank to a couple of rains it's all proportional and given the large collection area it would be super accurate.