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~, G1'9: ~L~C~ <br />CoovoawrwM <br /> <br />tube. Two scales were attached across from each other inside <br />each bucket to minimize reading errors. The pans were attached <br />to fixed objects in the river and floated so that as much of the <br />buckets as possible was immersed in the river. Pan levels were <br />monitored at several times during the day to determine if there <br />was significant temporal variation in evaporation rate. Trans- <br />piration by riparian vegetation was estimated using the mean <br />evaporation rate as a basis. <br />• <br />• <br />3-3 <br />