Abstract:Dye-tracer and gas-tracer studies were done in July and September, 1991, during low flows on four reaches of the South Umpqua River between Tiller and Roseburg, Oregon. For a streamflow of 435 ft 3 /s (cubic feet per second) at the Brockway streamflow monitoring site (14312000) at river mile 132.7, the average stream velocity between Tiller and Myrtle Creek is estimated at 0.88 ft/s (feet per second), and between Myrtle Creek and Roseburg is estimated at 0.64 ft/s. For a streamflow of 129 ft 3 /s at the Brockw… Show more
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