I wonder how much water falls on land throughout the year? We can use a rainfall database to find out how much it rains in Seattle and then use Calca's unit conversion support to help us determine that.
land area = 0.25 acre
avg annual precip = 36.15 inch / year
daily rain accumulation
= avg annual precip * land area
in gallon/day
=> 671.90115 gallon/day
Wow, that's a lot of water, but what if we just have a bucket?
land area = 1ft * 1ft
daily rain accumulation => 0.0617 gallon/day
That's not very much... How many cups is that?
daily rain accumulation in cups/day => 0.98718 cups/day
So if I left a 1 ft by 1 ft bucket around I could collect about a cup of water every day. And they say it rains a lot.
Let's see how the rain accumulation changes with respect to the land area:
plot(daily rain accumulation(land area=x) in gallon/day, 0..1acre)