Drains could have been blocked to fill up plazas during rainstorms and reopened to release water as desired.
However, higher intensity rainstorms did occur: five in the period 2003-2004, six in 2004 -2005 and five in 2005 -2006.
After two rainstorm events, we collected the water in the buckets of each catch-basin and measured the volume of water collected in a graduated cylinder.
A rainstorm by itself is not speech.
Water infiltration is thus very low; therefore, low to moderate rainstorms can lead to considerable runoff.
We experience the storm happening around us because we have all been caught in rainstorms (rather than in front of us with double basses and tremolo strings merely imitating thunder).
The volume used was within the range of that collected in traps below the ferns during natural rainstorm events (range = 10- 520 ml).
Although these differences were not statistically significant, this is probably due to the very limited sample size (two samples per field), owing to lack of rainstorm events during the study.
