Roy L Hales/ Cortes Currents - As the level 4 ‘drought’ continues and some shallow well owners are concerned about their water supply, CKTZ News asked an expert about Cortes Island aquifers.Dr Diana Allen is the head of the Groundwater Resources Research Group at Simon Fraser University. While she has not been to Cortes, Allen has been working on islands like Hornby, Mayne, Saturna and Salt Spring since 1996.