|
<br />_ _ _ _ - _ _ I
<br />~i i
<br />i ~
<br />1
<br />~ ti'
<br />p.--.
<br />t.; .
<br />f
<br />- 1-- L_IJ '___ -_ J
<br />X00 1000 ?000
<br />pct ;ccanc0
<br />I -_ o:
<br />~ _ ~ ` :1F,
<br />(~1
<br />_ _ - - - _ _
<br />i~ ,
<br />tE1
<br />icVl~ cinul,,tn,ti; ,n pl.mcg tlt.tt ,ue .....
<br />normal duv;n,[tudm iunt~rn,ncn! of =Y~
<br />nb, I rupt,ld Idp~) ,\Ithough !'nr putt- -
<br />thr tlin`cltun nl t~'ll rurulaut`,t tt~•er
<br />tllt uhpt,.ilc nl that uprr,tUn.; ut'cr
<br />.,rn{ \Irlht,rn I`1%~. Ri,-lta ul, 1')i`?),
<br />,, rttun rt tltc u~ll> i.ul be m~tctl .t; _
<br />t,.~,•r Jicet;',tw~ t{tttt In ictncCt ~cnt ~:.
<br />tt ,ltel Qi,t~ I, tt.tt Jri~ Ltr dAU , ,.
<br />U r t.h C ~ ~.. .
<br />tl the in,ttinuint td,ntK .a,.t,i-nr~t{ gp
<br />qtr, in the tc.tlri ., rr J.'~'~~"r` S*~
<br />.r n. t '
<br />,,,. ~ ~ n ~I1t In dit Ct'-',etlt Ilnt+. -u r- ~.~._'
<br />Meandering Channels
<br />The mint iummon nt~er form h} f.u i, the n,can-
<br />ticnng p;tttrtn (tip. 6.~1). Alcandann~ r~~athe, contain
<br />the same physical components obsrnetl m stau,~ht
<br />dtannels (p~wb, utflr~, b.tt~), dlstnhuted ut a smilat
<br />tt a~' (see fig. 6.1ti), The thaltt'cg aho tntSr.ttr. b.icF. arni
<br />Path acn,>c the ch.nmrl, intpirn~in~.t,{ain,t the tatter
<br />bank ut the matndoi Lends and u~u~snt to the oy~}`u~
<br />yue side nt`ai the Tittles
<br />SecnnJ.v~' ciuulanun is ,, pnme prupeTtt' ut tlut•.
<br />in n mc:axltnn~ ,vslrnt. I'rc:u mablc, as tt .~trt i,
<br />fonc~i a;;.unst the tnttrr ban1. ut a mc•antlcr, rt, Ali,{hll,
<br />elavatcd le~ul.u that puitt; ~tt~e. the tlo,t~ a ritrul,ttin;,
<br />nnriion. ~fhr tt atrr ~~~te< alum` the ,urf.tie tntt an4 tltr
<br />undercut banl. and alnit~ thy` bottom tuv:arci the point
<br />bar (rig h_'"_) I~hu Cnt l.a ret•.' morn, n. galled hclic.tl
<br />flote ut hclicoitlal ilorv, Itas tTa.iiuonall+' been tlt,•u,,hl
<br />nt a; ,~ ~tm~',r ;~,LVf~t, cell that iead~r~ ,: ~rr71•,,t ,
<br />Incite ,Iightlc tlev. na, r.,m Iron' the att~,~„~l 'hr me.•~•.-
<br />~i~• i. .. ~ ~ ,
<br />FIGURE u.2'V
<br />n~I c,]"der ;~~~'t.u,:,~, to„~.=vob,.
<br />ul j~n5. A~d~h~
<br />C~
<br />J
<br />/~
<br />~~
<br />n;
<br />e-~`` :,
<br />
|