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Show 155 frequent cloudbursts. Q Now, as I understand it, the figures which you show here are based on the daily average. A They are the mean daily flow, yes, sir. Q So that many times during the day you would have the peak of the flood, which might run a great many thousands of feet higher than would be shown upon the hydrograph or would be reflected at the gauging station? A Yes, sir; this is the mean daily flow for the 24 hours. It is entirely possible, in rivers with such rapid run- off as we have in that country, that the peak might be fully one- half times more than some of the ordinary peaks shown on these hydrographs. Q Well, might that situation be illustrated by what happened at Saleratus Wash, on the Green River, while you were there? A On the afternoon that I arrived at Greenriver, Utah, Saleratus Wash was dry. Q Saleratus Wash is right south of the town, is it? A Saleratus Wash is the wash that comes in right south of Greenriver, Utah. At three o'clock the first rain, as I understood it, that they had had there for nearly a month, a thunderstorm from the northwest, came up; and at ten o'clock that night Saleratus Wash was out of its ten foot banks. By next morning it was flowing, perhaps, 10,000 second- feet. Q It had been practically dry? 2116 |
