The Wetwang borehole was drilled into the Chalk of Yorkshire. The water levels in this well usually fluctuate by about 10 metres over the course of a year, but these fluctuations have exceeded 15 metres at times.
Our enquiries service can help you to access groundwater level data for this well.
Our groundwater level records for Wetwang start in 1971.
|Datum||42.28 m AOD|
|Monitored by||EA North East|
This borehole measures water level in the Yorkshire Chalk.
It is drilled into the Flamborough Chalk Formation, which is overlain by 4.1 metres of head deposits. The borehole log identifies Upper and Middle Chalk, without putting a depth on the boundary between them.
The aquifer is unconfined.
The well consists of a 152 mm diameter borehole, reducing to 101 mm and 37.49 m deep. The borehole was originally drilled to 45.72 m but caved in. It is lined to 7.6 metres.
The hydrograph has an annual sinusoidal pattern, with some response to winter rainfall episodes.
Annual fluctuations are typically 10 metres, with peak fluctuations > 15 metres. The borehole recesses to a base level of just below 20 m AOD in most years. This is well above the borehole bottom, suggesting the presence of a geological control on level.
Contact Andrew McKenzie for further information