Tilshead Borehole Levels: 22nd March 2019

Just when I think I understand how the Tilshead aquifer works, along comes something different.  We’ve had 14 days with rain so far this month, a total of 61mm, and all the water level in the Tilshead borehole has done is to fall.  Those of you who have watched developments over the last few years will realise that the fall has happened because the trees are starting to bud and come into leaf and the grass is growing rampantly; all taking up water from the surface and stopping it from running down into the aquifer.  So far, so good.  What I cant explain is why, over the last few days, the rate of decrease has slowed and in the last day or so, in the near absence of rain in the last week, the borehole levels are starting to rise again…

The weather forecast for the rest of March is for some cloudy weather, maybe with a bit of drizzle.  We may even see a bit of sunshine by the middle of the week!  We may get a warmish spell by the end of the month with wet weather spreading southwards in early April.   The final formal report of this flood season will be issued next Sunday on 31st March.

Winterbourne Stoke Parish Council