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<br />,. <br />" <br /> <br />- <br /> <br />OJil99541t <br /> <br />4It <br /> <br />(FIL]),"-/2/(/C>> <br />CONCEI'I'S AND IDEAS BEHIND THE CHART - F AcroRS USED TO DETERMINE INSTREAM <br />FLow NEEDS FOR THE PIEDRA RIVER ' <br />> lIlaintcnant~ of physital c:omponenl$ of aquatic ='Ylltem - n:lIIoval of line eedim~ntl. recruitment of <br />spawning gravels and woody debris, maintenance of pooVrimelglide sequentes, and mainten&nce of <br />.ffel:tiv. pool depth is dependent on now of sufficit!llt volume and duratioD te mlMl blllilold higll ,_ <br />flfnVS b$cCIl Q^ and Ql~ ~ah 14H J.....he8 sf <21.3 <br />> trigger spawning beltavior - the late summer and fall increases in runoff due to mollJOOll storms may be <br />one of several stimuli which trigger spawning - hill~ n...... "l".1 t" ~ ~~n~ing Oil> Mtlsomelima "- <br />QI.5 ' <br />> acl:e3S to tributari... for spawning. the tributaries to the Piedra River appear to be quile important as <br />spawning habitats in both spring and fall; there/ore. there mlllt be enough depth in both the tributaries <br />and the Piedra to maintain migration paths (now of travel) during spawning periods and nows of <br />sufficient \IOlum~ and duration to pR:\lCllt occumulation of debris at the confluence 01 these tn'butaries - <br />1_. Al>". II Qu let meet gIi~" n."t~ ""'l";............ (fill' "....! " gJ;~~ deplh oriteria) MtI high IlClWl ' <br />between ETA sad QI,s with fulllilua1ioe of Qj,s <br />> survival - winter survival depend$ on maintenance of pool and glide dllptbs (0.8' _d as glide d~~th <br />~mcient vc1oc:ily to limit io;e formation and to main1llin olt)'gen contentralious in the water <br />column and in redds -low flews el!lWoell QL.I and OLJ ~ <br />> rearing - ba.sed quslitatively on c:mss-s""tjonal atea and wetted perimeter with th.. idea of maintaining <br />"'m.. _ of shall_ water On the edges of the stream channel to provide relatively Sel:ure living <br />space for juvenile and yaung-of-the-year fish - 100.11...... belmen Ql..1 and QU << <br />> maintenance of established vegetation - riparian vegetatiOJl luth lIS alder, red osier, and willow require <br />uturaled soil. during the growing SC&IlOn - higll 89M ~It.- Q,e. .n~ Ql.r'- <br />> repmduction and establishment 01 yaung plant. . reproducti"" by sEed may requi.... exposure of mincrsl <br />substrate through .couring or deposition; regeneration by root sprouting requires disturbance of lbc <br />existillg root system and establishment of yaung plants by either pnx:esl requireJ moist conditiollJ long <br />enough to develop a good root sy.tClll I~&h n"wo 1>..1_cen Q,., and Q 1 ~ ...ith full duraliOlt of Q j", ""-- <br />