Abstract
SUMMARY One of the most important factors for the study of various problems of river-improvement and river-utilization is the measurement of amount of sand and gravels transported by water. However, to this date, no definite methods of the measurement have been discovered. The author found a new method of this measurement using a tiltmeter (with horizontal pendulum of Zöllner suspension). Applying this method, it is able to measure sediment load (bed load and suspended load) both at the time of low-water and flood. Also through this method, it is possible to observe and self-register variation of the rate of sediment transportation continuously in such a case as other methods are not useful. The test observation at Sukumo-gawa, Hakone-machi, Ashigara-gun, Kanagawa-pref, from September 1953 to November 1954 performed by the author of this articel was successful. Thus, this method has been put in practical use at upper stream of Katashina-gawa in Tone-river system, Gumma-pref, since July 1956.
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