Discussion
Identify whether the following statements related to the measurement of rainfall and runoff are true/false.
1. The depth of rainfall is measured at 8:00 a.m. every day, using float type of rain gauge.
2. The approximate stream flow velocity can be determined by floats.
Answer: B
Statement 1 is false and statement 2 is true. The daily rainfall depth measured at 8:00 a.m. is read from a non-recording gauge, such as the Symon's gauge, which stores the rain collected in the previous 24 hours. The float type is a recording (automatic) gauge, which gives a continuous record and is not what is read once a day. Statement 2 is true: floats thrown on a stream give the velocity of the surface water, a rough way to get the approximate stream flow velocity.
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