AUTHORS' REPLIES

Dr Stevenson Buchan (Author of Paper 13), replying to the disD159. Mr Walter's proposal, to take advantage of the low transcussion, mentioned that, compared with sixty years ago, more missibility of the Chalk and transfer large quantities of water water was being taken from all the aquifers in England with the from it to the River Thames at times of low flow and allow the exception of river gravels, the use of which had declined. This aquifer to replenish naturally during wet seasons, was an excellent might have been because of pollution, but now that efficient example of integrated use of ground and surface water resources. methods of purification were available to safeguard supplies he agreed with Mr Gray that there was scope for increased abstraction D160. Commenting on Mr Gilbert's suggestion (§D139), Dr from river gravels. Buchan confirmed that the ground-water flow under the Gypsey