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A. March 29, 2002 <br />B. June 15, 2005 <br /> <br /> • ?_ <br /> <br />+ <br />V <br />io ? • <br />?? ? '.?•r • 1 ? ?.. <br />r <br />`? <br /> - <br />- -.??l???_. _? : <br />'??????• <br />Ellipsoidal height, in meters <br />??,'il-' '), ' 1) 0 25 0 5 0 75 I KILOMETER <br />immi A <br />660 UU 03 0 6 MILES <br />Figure 3. Ellipsoidal height surfaces (referenced to the Geodetic Reference System of 1980, the ellipsoid for the North American Daturn <br />of 1983) o( the middle channel of the Platte River on the Nehraska Public Power District's Cottonwood Ranch property. The surfaces were <br />created with ranging measurements computed with the EAARL first-return algonthm. <br />I'uhlir Puwer I)tsirirt, is a rr(,l,rrty along thr Pluur Kner that is <br />undrrtluing hahitat cnhanrrnunt for ihr rndangrrrd :inci Ihrcat- <br />rnrtl sprries Uigs. _' an(l 1) IKinirl :ind othrr%. 20II0:il. 'I Itetir <br />cnhan. rnuniti incluJr ihr rlr.iring uf nranan ircr, tu inrrra,e <br />thr .ighi di.tancc lur ruosung whuopinz rranrs anL1 Io»kcnng <br />ilic eIevaliun ul itiluntls lo proN t(lr rutrntial ncsting sifes lior <br />Irrns anJ pIrnrrs. <br />I:\aininaliun oI ihr LAr11tL lirm-rcturn ,urt:icr, ri,llrcted <br />Iorr ihc ('oltonw<uod Ilttnch illustr:iles ilic efft;cl ul lhetie Il:lbllal <br />rnhanrrmrnl, on lhr npirian rorndor.'l'hr trecs (shown in rr(f <br />ui lig. 3;1 I alung thr no?nh hank oI thr nvrr wrrc prrsrnt om thc <br />M,uch 211. 2IN12. L•AAlll_ tir,I-rriurn Surfarc.'I'lir Irrr, arr no <br />lunirr prcsrnt t,n ilic 1une 15. 211115. fi:1:1R1, tint-rriurn wrl;icc <br />I lig. ;/jl. <br />AIthuugh uadiUunal ;irnal phoNngraphy rould Ix uscLl <br />for tIcIrcting .urh rhanLCs. thr I.if)r111 .tiurfaceti afhu rermil <br />rx:unmauom and quanullcauun ul rh.ingrs in ihr vcnir:il rrlirl. <br />I.iUAll ran he u.ed tu (lrtcnninc ilic hrighi ul trrc ranorir` ur <br />nnr:isurr thr chanLr in clrvauom oI thc island m thc rrntrr uf <br />Ihr imagr. 'fhis i,lanLl w.is rraJrd to a Iowrr rlevauom. and a <br />ch;inncl w,is rut thruuzh it tt, crralr a Irrn an(l rlovrr hahilal <br />I li1'. 314 VirwShrd tin:ilvSis ul Ihrtir ,urlarrs alti(i rould he <br />prrformrd casilN in a trograrhir inforniaUom sY•lrin I(ilti) tu <br />L1rirnninr ilic .ighi tli,lance acnoss thc nver tior rootiunz rranr.. <br />EAARL Application-The Rowe Sanctuary <br />inL ul thr ,,undhar%.Thr E:i\.11t1. ,,urlarcs cullrclcil un M:krih <br />?(i.'INI'. and Junr IS. 2(N)5. wcrr rrucr,.c.l wtlli a lirst rrlurn <br />algurithni :ind a h:ithyntrlr) ;ilgonlhin i liVs. -l,.l. Bl. ('uinp:irisom <br />hrlwrrn Ihetir tiurl;irrs .hrnw. Ihal Ihr Inorphologv nl ?antlh,u. <br />in ihis rcach haJ ch:ingrd.'I'hr tian(lhar. tronn ilic lunr 15, ?INIS, <br />surl*:irr arr tnritir(l ttiurr than Ihusr fnmi ihr ?(N)? .urtarc 'I'his <br />t, hrrau.e .UCatntluw. (lunng ilic inlcrvcning Iicrionl wrrc al <br />hi1,toriC Inws and thC %%;urr Was runrrnUUlrd into narrow ilrln- <br />ncls. <br />In ailditiun iu pruviding a mr:ins i„ tIrtert rlrv:iuon <br />changr, in ilic in-rh.innrl inorpholurti. I:.\r1Rl, data ran hc <br />inirurtril inUI IhC lIS(;ti', N1ulU-I)innn.i0mal tiurfarr Wa1cr <br />N't,(Irltnz! ti)sIrnt 1\11) S"Altil llu/p /Aitito hicrcuogs. <br />?n?/??ruj?•rt?/.ti'li' ,41uNr _niurUUjp;11?,?1rh/,4l1) .1'4ti'A1.1/indrt.lihm?. <br />N1U_tiWM1 c;in hr u.c(l Io siniulate tiiiaU.illy rtrltcu disUihu <br />uuns oI w:urr drpth anil vclucii} lirr vcuu,u. ,?rr:unllu??. 'I hi. <br />IIIellNklnlugN il:ls fiCCtI llsct1 1o? :ttists\ foo»llllr I1.1b11,11 Iuf ":11111- <br />liill iranrs in ihr Plallr ftnrr i Kinirl anil „thrr.. 2I11151 <br />References <br />f:srhnrc'1'.R.. Hadlr%. It.f•.. antl ('rowley. K.I).. I991. <br />HNiln,lngir anil morphulogir rlianges in rh.innrls „t ?hc <br />I'lalte Rivrr hastn in ('ulor:ulo. Wynnung and Nrhrask:i-a <br />hitiUirical rrrsrrctivr: lI.S. (icoltrgical tiur\ry I'rolcvuon.ll <br />r':irei i 277-n. 19 r. <br />An 1:A,1R1. ,urvcv ;iltio was Ilown ovrr ihr Nauunal <br />nu(luhun SurIriy'.lJllian Annrur ftowr tianrlu:uv 1Ruwe <br />tianrtuar} I ( lig,. ? anct 4 1. '1'hi, rrach of thr I'laur Itikcr is an <br />imponant ruoxting sitr I'or,an(IhiU and whouping rranrs. Vcg- <br />rtauun rncnoarhnirnt in ihis rr;ich is ronuullrd hy annu.il rlrar- <br />KinirL P.. nrl,un. JA1.. and flrrkman. A.K.. _'llO(,a ('liannrl <br />morphulugy :ind h«I srdiinrnt ch:traclrri,,urN hrlorr aftrr <br />np:ui.in vrgriauom cIranng in thr C'otlonwuud kanrh. I'I.inr <br />Ilivcr. Nrhra.tika: lI.S. (irol„Liral tiurvrN tirirniilir <br />InvetitlgaUunti Rrpo?rl 20115-5285, 25 p-