Abstract
IT is appropriate that the recent issue of the report of the Research Committee of the British Association on Inland Water Survey should be followed by the publication of a paper on practical river flow measurement such as that presented at the winter meeting of the Institution of Water Engineers on December 1. Capt. W. N. McClean, the secretary of the Research Committee, has for several years past, at his personal charges, instituted and maintained a system of river gauging and measurement in the Ness Basin, Inverness-shire, the results of which have been noticed from time to time in these columns. On December 1 he gave a detailed account of the system in a comprehensive paper which reviewed the physical and meteorological conditions in the Ness Basin and dealt with the various features of the work carried on by the organisation known as River Flow Records which is directed by himself. The catchment area of the Basin is 692 square miles down to Dochfour Weir, which holds up the level of Loch Ness in order to provide navigable depth in the Caledonian Canal. Loch Ness is roughly 24 miles in length and has a depth exceeding 550 ft. over about one half its area of 22 square miles. A regular sway of 31 minutes duration, induced by wind, produces a variation in water level, sometimes amounting to six inches or more, which persists long after the wind has ceased, and is attributable in Capt. McClean's opinion to a pendulum effect maintained by the great depth. The greater part of the flow into the loch comes from the rivers Garry and Moriston, and the gauging of these streams formed the subject of the investigations described in the paper. Details of the apparatus employed and the methods adopted are given in supplementary notes by Mr. H. Chapman, the author's chief assistant.
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River Flow Records. Nature 132, 886 (1933). https://doi.org/10.1038/132886b0
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DOI: https://doi.org/10.1038/132886b0