§ Mr. Gwynfor Evansasked the Secretary of State for Wales if he is satisfied that the reservoirs on the upper tributaries of the Wye, Severn and Dee rivers have proved their value in controlling floods; and if he will make a statement.
§ Mr. Cledwyn HughesRegulating reservoirs can make a contribution towards flood control and Llyn Celyn and Llyn Tegid are both being used for this purpose on the River Dee. Research is now being carried out into the most effective way of using them jointly to regulate the river. The Clywedog reservoir which has recently commenced filling will be similarly operated so as to reduce flood flows in the River Severn. The reservoirs on the upper tributaries of the Wye were not designed as regulating reservoirs and make very little contribution to flood control.