River Gauging and Flood Prevention

IT is with great satisfaction that I have read the leading article on this subject in NATURE of July 2 with its complimentary reference to my measurements on the Ness Basin. On this area there are six principal water-level stations at which continuous records are being kept on clock-driven gauges. The measurements of flow, at ordinary flood and low water stages, of the three principal rivers are completed, and all that is now necessary is the maintenance, for all time, of the water-level records-a continuity that no individual can assure. The Caledonian Canal has kept daily water-level records over a great number of years and it is now possible to give with considerable accuracy the flow from Loch Ness during the great floods of the past. If the big water interests of the area will combine to assure the maintenance of my established water-level stations, and to establish other stations when required, there is no problem connected with the use of their water resources which cannot be tackled satisfactorily.