Observation
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| recording at a distance. The time the bucket needs to tip over leads to appreciable errors only in heavy rainfall. The discontinuous nature of the record is not satisfactory for use in very light rain, as the time of beginning and ending cannot be accurately determined. If detailed records are required the amount of rain per tilting process should be 0.1 mm but in many cases 0.25 or 0.5 mm "sensitivity" will be sufficient. 2.4.222 Intensity recorders For recording rainfall intensities, the above mentioned amount recorders can be used provided the recording device allows fora timely resolution of 15 minutes. (5 min for special purposes. There are also instantaneous intensity recorders which utilize the relationship between the rate of flow of water through a restricted orifice and the head of water producing the flow ("Jardi" rate of rainfall recorder. Download 339.27 Kb. Share with your friends:
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