Is it not simply because when we water using hose, we tend to do it far
too quickly, such that the total amount of water is far less than a good
old rain shower?

Philippe

A rain gauge is a useful addition to the range of garden equipment. It can
be very difficult to guess how much rain has fallen in a particular shower.
Even a thunderstorm with torrents of water coming down may only deposit a
millimetre or two. Also when it rains overnight, the ground may look wet
through but the gauge can tell the true story. Other mornings the ground may
just "look" damp but half an inch or more of rain could have fallen steadily
overnight.

--
Drakanthus.


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