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<br />00633 <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />,\"odt.J/inS of Sdnd deposition in CoIOl',)(Jo Riv~, 377 <br /> <br />reallachment point; deposition in the region orlhe gully mouths was less [han in all other <br />ca~. The intermediate and high sand supplies al 1270ml/s produced deposits bener <br />suited to archaeological site preservation because deposition was greatest clo~ to the <br />waler's edge. With the imermediate sand supply, sand accumulated at a steady rate over <br />the course of the simulation and the volume matched the sand \'olumc obtained with the <br />high sand supply by the end of the simulation. With the high sand supply. howC'\'er. most <br />of the accumulation oc.curred within the firsl 14 hours. Alllhree ca~ at ~830m-)'s <br />deposited mOrt sand than the 1270m)/s cases. and the deposit ..'olume increased wi;h <br />increased sand supply. Most of the deposition was near the reallachment pain! and <br />along the cobble bench that forms the left bank at the 18JOm) s stage. <br /> <br />1".6.3 Lo'lter T nner rrach <br /> <br />J.I.6.J.l lfli,ild condirioll! <br /> <br />The Lower Tanner reach (Figures 14.14a and 14.15a) is unlike the Above Lava <br />Chuar and Palisades reaches in several respects. The Lower Tanner reach is longer <br />(about 1200m). has significant curvature and does not contain a large recirculation <br />zone that dominates the sand storage in the reach. The outside of the bend. along <br />river right. is bordered by bedrock clilTs along the Upper half of the reach. The area <br />near the outlet on river right consists of a low gravelly bench. The interior of the <br />bend. along river left, is bounded by fans. Coppice dunes were mappoj by Hereford <br /> <br />") <br /> <br />565200 <br /> <br />. <br />. <br /> <br /> <br />565000 <br /> <br />g 5&01800 <br />r <br />~ ..."'" <br /> <br />J <br />I <br />1 <br />! <br />, <br />1 <br />j <br />. <br /> <br />BedtlleYaDon(m) <br /> <br />im <br /> <br />..."'" <br /> <br />"'200 <br /> <br />219000 <br /> <br />219500 <br />E.asllrlg(m) <br /> <br />Figurp J4.'4 Contour mdps of the Lowef Tdnne-r redch d( IllOmJ/s sho-.-.mg (a) the- in/tldl <br />bedmorpilofogy (.11 lime=:: OJ, Ib) the-model prediction diter 72houn WIlhthe-IOwI198JJ Sdnd <br />svpply anddso=::O,14mm, dnd (e) (he model prediction arier l] houn With the hIgh (1956} <br />sand wpply dnd d5Q = O. 16mm. <br /> <br />i, <br />