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I NEBRASKA
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<br /> ytuAV wea rand Islan
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<br /> Irdr. rrq?F?
<br />Lexington
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<br /> Kearney
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<br />`•O'??`"`"'"'
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<br />N„ .
<br />Pfatte Rrvei
<br />10 20 KILOMETERS
<br /> 1 11
<br /> 8 tZ MILES
<br />Figure 2. Study area along the Platte River in central Nebraska.
<br />Nlaltr Itirrr channrl, v? liiniung Ihr rrrovery of the rntlangcrrJ
<br />iinJ thrratrnrd avian sE,ccics INauonal Rr.rarrh ('ounril. 2004l
<br />H;ihilat-rnhanirmrnt rl'f??rts alung ilic I'latir Itivrr rur-
<br />rrntly I2IN)O1 arr ti0cu.rd un thc clraring of' vcgetatiom I'rum
<br />in-channrl and nparian arras. whrrca. Iuturc rlans rrorusr
<br />ihr rclr;i.r oI watrr frum ul).tream tlams as a mrans tu prevrnt
<br />vrgrtauom Iruni rnrrnarhing un thr artivr nvcr rhannrl 1U.ti.
<br />lhrartnirm of ilic Intrno?r. ?INll,i. For ihi, rrasnn. numilunng
<br />thr rhysical rr.rc,n,r of ihr mrr rhanncl ti, thc..r managemrnt
<br />trratmrnt, i, :in importanl rumpuncnl uf a rrupusrd hahilat
<br />rrcuvcn rrozram (1'I:iur Ilivrr lZrcnvrry an(l linplrrncnt.iliom
<br />['ruLram. 2005). IIndrrstandinL Ihr cl7crts i,t ni,inagrmrnl
<br />,tralcgir, un I'la(tr fti%rr ni,an.in h;it,itat altit) i, a kcy uhjrrtivr
<br />tit ilic lT.ti. Grologiral Survey'% (Uti(Iti) Plaue Rivrr Pnurit)
<br />l:coti)'slrm F'r???!ratn 1l?Il??:/h?IC'»l??rt'h.c'cns,qs.,?ur/?rlut/en.'I'hls
<br />I':tcl sIici'1 (Iescriht'ti applicatiun, oI I_iU;1tz to niunitur changes
<br />in ilic I'lattr Ilivcr nparian r„rridur.
<br />Challenge-Mapping a Wide,
<br />Shallow River
<br />I'raklitiunal mclho?d% fur rullcruni h:uhN nirtrir data in
<br />ri%cr% var? wuh ilic drpth oI ihr rlcannrl tt, hr survcyccl. Por
<br />rtvCrS Ol sulliiiCnl LIrrIh 14) hc navigalril hN hual. hVdr0ac0u1,liC
<br />,rn.,i,rs arr [hr rrrlcrrrJ tcrhn„l„gy. F'nr.h:illow rivrr, whrrr
<br />n:i% igauom is ntit pusaihlr, surh :i% thc Pl:iur Rivrr. wading
<br />mrasurrnunls lypically arr maLlc with ronvrnuunal lasrr thc-
<br />udoliles or surveY-gratlt Ci{'S ICChnolugV. 13ec:lu?c ul IhC wlJlh
<br />anJ t(,rogrcii,hir cuniplcriiy o( ihr I'laiir Ilivrr. w,idinr ,urvcys
<br />arr I:ihor intcn,ivr anJ, Ihcrrfurr. arr pruliihitivr I?,r mapping
<br />tIriailrtl fraturr, in thr channrl, %urh a. .anJhars :intl i,lands.
<br />uvcr li,ng nvrr rrachrs.
<br />Acrial phutoLraphN h:n hrrn u,rd f()r docurnrnlini
<br />rhangr, in Plalir Rikrr planlortn IN'illiam.,. 1978: I:.chnrr,incl
<br />oIhrr.. I9831. PhutuLr.immetnc trchniyurx ci?ultl hc u,cd wilh
<br />:icrial rhotography tu dcrivc gnound-,urtacc elcvalum.. hui
<br />ditficull\ In tlcii•rniining rlrvaltun, helow thr watcr surl:irr is
<br />a pulrniial lunitauun tn Ilu.:ippruach. ('onvrnlional airhnrnr
<br />Ixscr-altimrU'N' syslems Eiruviilr cl'lirirnl rlev:tUun Jafu cnllrr-
<br />uun uvrr lar?r arr:i.. hu1 thrir u.c in ?vcltc?l :irra% is lunitr(l
<br />hrcausr thrsr sv"lcmS lypirally utic a ncar-inlrarCLl wavrlcnglh
<br />ol lascr lighi Ihat i? :UtrnumcJ in vvatcr.
<br />The EAARL System
<br />.I.he IiAARI. sys(rm is urrralcd (rum u('c."na 110 :urcrcill
<br />.intl run,i,t,, of a yltnuin uluminum Earnrt (1':1(;) la,,rr dhai
<br />proaluce, up tu 5.0lN1. I.i-nanuticrund Juratiun. 70-miirij Juulr.
<br />Si?-nan(iinrlrr Ihlur-grrrnl pulsr, rarh srcond. A hluc-grrcn
<br />w:ivrlrngth uf lasrr Itglu i, nut altcnualcil a. muCh as a nrar-
<br />inlrarrd and ihus iti i;irahlr uf rrturninL a pulu fruni an undrr-
<br />%%alcr tarirt. A .ranning mirrnr (lirrrts ilic .p,iring „I mdnulual
<br />la.rr ,:unplrs along rach sw:ith Whcn ilic 1:AAltl. i, uprralrd
<br />al a iUU-mrlrr Iml aIlitudr anil is iravrling :il SU tn prr %rcond.
<br />thr sliucinL of individual lu,rr ,amrlc. in a?•aO-iii .waih i,
<br />2 m x? m in ilic ccnicr ul ilic sw:ith :ind rxtcnd, 141 ? in x-1 iii
<br />un ilic cclgr, 44 fhc.wath..111 irun?nunrd :intl iriinnrtl la.rr
<br />rultirs arc storrd h} ilic I:ArVll. ,ystrm. In additiun, a hiih rc,,-
<br />0111uOn coltir inlr:irc(l diziial camcra :ind a luwrr rrsulutuin rrtl.
<br />grren. an(l hlur iligilal r:imcra ohlain nnagc, u( Ihr ;ur:i hclow
<br />(hr :urcral'i rvrry srrnnd. 'I'hr imarrry anil I.isrr dal:i C"Ilrrlcd
<br />Irnni Ihr (uAAKI. Ilighis c:in hr virurd I:ilrr. :inLl rlc?auwn
<br />surlaccs can hr crratrd I,} u.ing ilic ,lirhnrnr I.:i.?rr I'noccssing
<br />tioflw.irr Ir11.Pti?.
<br />An I:AAfZI. survey was Iluwn uvcr Ihr I'I:illc Rivcr audy
<br />arra om March _'h and 29. 2(N)2. an(l Junr 15. 20115. On Ilir.r
<br />da\,. Uti(;ti prr,onncl uhiaincd ilrt.ulrd VruunLl-Irulli inra"urr-
<br />inCnt. at .tudy .ilr.. Thcw ruinli:insons %%rrr u,rd tt, r\:ilualr
<br />thr vcrural .ircurarN tiI ilic ?\ arm IKinirl anii Vdiiglii. ?UII_'.
<br />Kinirl an(l othrr.. 1000h).
<br />EAARL Application-The Cottonwood Ranch
<br />'Illc {:t1AIlL L„rr returns cnllrrtrJ tilr IIir ('ullimwOOil
<br />12anih ,tudN ,itr wrrr prurr.srd h) usini a lir,,I-rrlurn alLu
<br />Whin Ui:it comirutrs ilic raniing mrasurcinrni Io thr ground on
<br />thr hatiis o( thr rentruicl ot ihc lirsi reak in ilic rcturnrtl I.itirr
<br />harkticalter. 'I'hr ('ot(onwoxxl Ranrh. ownrd hy thc Nehraska
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