A. March 29, 2002
<br />B. June 15, 2005
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<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-
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