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• <br />JUL -08 -2002 MON 09:09 AM <br />FAX <br />SPFiC lEs FLOWS <br />110riod <br />we:r Year' <br />No��n:►1 ea, ' <br />j Yc��r <br />Jatt ...- Jun 31 <br />1000 cl's <br />1000 cfs <br />600 efs <br />Feb 1 - Mar 22 <br />1800 <br />1800 <br />1200 <br />Mar 23 - May 10 <br />2400 <br />2400 <br />1700 <br />May 11 - Scp 15 <br />1200 <br />1200 <br />800 <br />Sep 16 - Sep 30 <br />1000 <br />1000 <br />600 <br />Oct 1 - Nov 15 <br />2400 <br />1800 <br />1300 <br />Nov 16 - ncc 31 <br />1000 <br />1000 <br />600 <br />"Wer" yogis Ir0 (1011ilUd aS the wvltesl 33`%n, "dry" years us plc driest 25 %, and "normal" years all 00101's, <br />.Llu a1 R 11', 1".10—vs <br />Dclillecl as the recoutnlcncled flows in excess of species flows which-are important in forllling <br />and niaintaittitlgi QJ ' " <br />• Occur in most (75%) or all years; <br />• I lave, a duration of 7 to 30 days; <br />• Are in the range: of at least 2,000 to 3,600 ers (varying with frequency- of- exceedance and. <br />t.irne of year); and <br />May bo, au;;mcnled or created by the Program. <br />Annual puIso {lows arc a subset of the flows quantifies/ in Table 2 and fable 3 of Bowman and <br />C.- arlson (1994; see Attachments B and C to this document). They were identified its being <br />important to maintaitling t11e physical structure and otlier cliaraeteristics of the river for biological <br />henotits. The annual pulse flows maybe summarized as follows: <br />ANNUAL 1'ULSF, FLOWS <br />Excec ,once probability Recommended <br />recur rl iue interval flow Lel5 <br />7_511/6 (;, of 4 years) 3,100 to 3,600 (Ceb -Mar) <br />3,000 (May -Jiro) <br />3,400 (May -Jun) <br />Notes <br />- 30 -day duration for Feb -Mar <br />- 7- to 30 -day duration for May -Jun <br />- 10 -year ruivaino, mean of 30- consocutive- <br />tlay exceodetice <br />1009/1, (all years) 2,000 to 2,500 (Feb -Mar) - 30 -day duration for Feb -Mar <br />Annutll pul °�c flows do not include the "peak flows" defined below, except in the sense that pulse <br />flows 11l1iy 0,11compa.ss the peals flow in years when the tinting of the two coincide, In those years, <br />frogriult- „.uts,roented annu'll prllse flows are likely to improve the peak flow 10- -year running <br />average, improving conditions relative to USFWS running- average recommendations. <br />F'e�llc hlow5 <br />Ili the conik xt of the Program, "peak !lows” refer to the highest flows maintained for five <br />coljsc.cutivo days in any given year. USFWS peals flow recornniendatioils were: presented in <br />• )Iowrman and ( "..arlson, 1994 (sce Attachments 13 and Q. These are summarized as follows: <br />