It's the same problem with rain in Lancashire - too much at once and not enough storage capacity to even out demand in drought. We now have six waterbutts around our property to keep the garden watered in the summer and take some of the load off our borehole, which has dried up for a couple of hours once this year. When the water level gets low the silt at the bottom gets stirred up and clogs the filter. We have to let it rest by switching off the pump and the silt falls away.

Robin