Trevor and Barbara Chinn, friends of mine who live by Lake Hawea, may have become very mindful of water quality by the proximity of many thousands of dairy cattle at nearby Hawea Flat.
Trevor’s letter below should be read in the context of his lifetime’s work as an internationally acknowledged glaciologist…
The South Island has been blessed by massive supplies of gravel spread from the Southern Alps down to the coasts to form fertile valleys and plains holding pristine aquifers.
I have been concerned about the effects of the recent explosive spread of dairy irrigation in the catchments feeding these aquifers.Over the gravel plains of Canterbury, Mackenzie Country, Upper Clutha and Southland, with annual rainfalls of around 800mm
Read more at the source: Letter: Aquifer concern | Stuff.co.nz