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t <br />r <br />10 <br />.-. <br />O <br />O <br />x 5 <br />v~ <br />U <br />.~ <br />3 <br />0 <br />y= o <br />~+- <br />~ 10 <br />_~ <br />O <br />~ 5 <br /> <br />b-1983 <br />--a <br />--~--~ <br />0 <br />~ ~ ~ <br />S O N D <br />~ Measured Flow ~ Undeveloped Flow <br />Figure A2. Mean-monthly streamflow of the Gunnison River near Grand Junction, <br />Colorado before (upper, 1952-1965) and after Blue Mesa was completed <br />(lower, 1966-1983). Measured flow was recorded by the U.S.G.S. stream <br />gage at Whitewater. Undeveloped flow (streamflow that would have <br />occurred without any development in the Gunnison River Basin) was <br />estimated using a computer model (HDR Engineering, Inc. 1989). <br />57 <br />J F M A M J J A S O N D <br />J F M A M J J A <br />Month <br />