自記水位計用雨量併記装置の試作

Abstract

A self-recording water-stage or rainfall gauge exposed under the severe meteorologicalconditions for several years has sometimes troubles in the accuracy of time. These troubles are aptto cause fundamental faults in hydrological researches especially in a small or urbanized watershed.In order to mitigate the influence of such troubles, we have developed a device to recordrainfall data simultaneously on self-recording charts of a water gauge without the fundamentalremodeling of the water gauge. Four types of the device are introduced in this paper.Types A and B are both mono-response style to the signal from a tipping backet rain gauge, but the former records the signal in one side and the latter in both sides to the base line. Types Cand D are both response-cumulating style, but the former is used for a water gauge with the one-scale type of recording chart and the latter for two-scale type. Types A and B have difficulty inreading data of high-intensity rainfall, because they are designed as a time-marker. On the otherhand, types C and D are useful for high-intensity rainfall.