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<br />001:';
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<br />PHYSIOGRAPHY
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<br />Gellg!;!I'hl':J\\Y. the \1i~;,"U{\ Rlw! lhslIl IS ~ lJrfc
<br />..::eo\(Jl <.ample ,,1 the Lm1ed Stat.:s, WLlh.'lIt It. the
<br />Sall,'ll w,luld \0'><': I'- 11\1111011 pel'plc, mu.:h ,,\ lIS inod
<br />and ill!l~S\'. 1~1!.l1un~ llalUfal H'S,'UI..:es. JuJ weJlth of
<br />e\'el~ des"::lip\lMI Tll 'rIcH,':l understand Ih;, Luge ..eg.
<br />men! of Amen..::a. w\lh j[.; prohlems and potentiJI. J few
<br />bllUndJne;, ~hllU\d be ..ks..:nhed
<br />L~mg dlJgllnJII~ wit\1ll1 J \wge qUJdlJI1g.k en..:1<lsed
<br />by the 'lath Jl1J \ \-I-th \lenJ1Jl1S Jod the :;71h Jnd -I-'Ilh
<br />P;nallels. the bJ'il1\ ex lends frolll the Continental Dl\IIJe
<br />II1Imed hy the Ro.:ky \\ountaln" on Ihe we,,1 I\l Ihe
<br />\\Lsslssippl Jrall1Jgo: on Ihe ,'ast Sebraska. most of
<br />\\onUl\a. 'mIll Jnd S\luth DAota. and \\'yoIllUlg, JboUI
<br />half 01 KinsJ;' and 'Il..-.ollll. aod STllJ\ler parts of
<br />(',,1013.1\), l,~wa, Jnd \tmnesotJ make ur the ba~\I\
<br />A\thou~h ~Imi\antle> ale ~ommoll flOm lll~alit~ to
<br />\.l~ahty. dln"r~il~ 01 l)h~SIO~r;lphl~ featur~> e,i$ts over
<br />broad areas Th.: b;J.Slll i$ J~cordmg.ly ~epJ[;lled \lito
<br />lll;lJLlT phYSII1\l.fJPhK dWI,IOns Jnd pronoces as 10\\O....s
<br />
<br />,\fajor lJirhian prol'inft'
<br />
<br />RI1.:ky \,h1unt;l11l S~stelll '\;onhern Ro~ky \'lountJlIl'
<br />\\ldd\e Ro..-:ky \,\,-,unt:,\IlU
<br />Wyommg Ba,m
<br />StJuthem R\I(\..Y \,h1untains
<br />Inter1llllll~hIJnJs O/ar\'; PlateauS
<br />Intentll PlalllS GleJt l'\:.lIns
<br />(enll;l\ lowlands
<br />
<br />h~ule ~ slw....s Ihe lo..:atlon 1,1 eJ..:h III the prt'\'ln..:es
<br />listed.
<br />The R,l,,:k~ \'\ountam System ~OllslStS of the nHlun.
<br />tJlnt1US ;lrea llut 10llllS the ""e~tern b"und.ary uf the
<br />watershed III \,h}ntana. wy"mll1l'. and CLllorado. ThiS
<br />d.WlS1on I~ ~hJra":lenled by a\terllatlnl' prominent 1T1l1un-
<br />tJUl ran!,es, mtemlOuntJI1l ba~m~. JnJ rd3ltl'ely Wide
<br />\'Jlleys of majOI $obdr31Oages. ElevatIOns rJnge from
<br />Jbl)UI -1.000 feel !l) mOle thall P.UOO feet ablwe s,ca
<br />It\'el. '\inor tnl:lutam"s hale steep gradients and g.en-
<br />crany V.shaped. d\3onels, The ~lIeJms frequently 110\\
<br />through ,leer "-:lnyOns l:leflHe they enter lhe plJin~
<br />where the stream ~laJlenb Jle ~onSlJet:ibly Ihller
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<br />CHAPTER 1
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<br />
<br />BASIN DESCRIPTION
<br />
<br />The Olark Plale:.lUS pro"ln~e of the InteflOI lIlghlands
<br />d1\'i$lon wlthll1 the watershed WnslstS 01 maturely
<br />JIs,e..-:ted pIJteau> m south-..-:entral '\iS$I)Uri. The topo~'
<br />raphy \'arie;, 11111\1 unduIJtllll! t\l hilly and broken land
<br />In Ihe hilly and bro\..en se':110n, the ~lTeams ale deeply
<br />enlren..:hed meanders.
<br />The InleTliH PlalllS dIVIsion l~ ~eparJted mto the
<br />(entlal u.,.....land) and Great \)\oUllS prcwlnces a"ording
<br />\ll physl~al featurt~ and ~.:ographi~ 10":JuOIl. The Central
<br />L<,wland~ pl<wma 1Il..-:1tld.e~ the gentl)' rolhng and lolling
<br />plall1~ m ;,eJUtheastelTl S"llth DakolJ, eastern Sebraska,
<br />nmlhea~tern t\.an,,:h. 1l,Htheas1ern \hs<;oUrI. western
<br />lilW;J., and stJuthWestell1 \,t11111esuta. AdjJcent to the
<br />\,l!j',sOUIl Rwel III SeblaskJ. Iowa, and nnrthwestem
<br />\'11~l,un. Ihert' IS a lar~e alea of long. rollIng slopes
<br />dl'eply mantled With loess. In ea~t.centfa\ Kansas and
<br />.....est.~entral \hS1>oun, there is Jll extensi\'e area con'
<br />Sl,\lng of lIt'ad~ level to rollinI' plams with wide. gently
<br />slopl1lj: \'alleys. .-\lon!!- the wJtershed boundJIY in
<br />'liSSOllTl and h)w:I and 111 northeastern Kansas and
<br />Sl.lUlheastern Seblaska. there Jle rollmg area~ which ale
<br />dl5j',eded with well enlTen..-:hed dra1llages.
<br />The Greal PlalTlS pw.l11ce ,If the IntellOI plJinJ> is the
<br />lal!te area bet....een the R,'cky \'\OllllLun5 on the west
<br />and the Central Ll.l.....lJnds on the ea~t. A iurther
<br />su\'lJl\'i~llln of the GIi~at P1Jllh pro\'lIlCC has been nude
<br />tor the purpose .11 de!><:tlblll!! the JreJ I \ I Ghlclated
<br />Plal1ls. (2l Un~h';"IJted Sorthern Plams. 131 Sorthern
<br />lhj:.h \,\;1\I1S, (-II Soulh Central ~ebraska loess section,
<br />3ud (5) [enttal K3ilSJ5 Re1lhng P1J\TIs.
<br />The GhdJled !'lalll" sc~\llm IS a broad expanse of
<br />gently r'llhn~ tHp'lpaphy e'tendlllg eastward flom tht
<br />R.)~k~ \'1,luntJI1l' across northelll \lootana and in-
<br />dudmg those porthJnS of '\;tlnh Dakota and South
<br />n;!\..0ta Iylll~ nOlth and cast oj the 'hssoun RIvet.
<br />Stream dlsse..-:\ll)n and dra!lla~e are not well established
<br />e\.,'ept !II aleas adp..-:ent to the ,\\.s.'UII River 3nd along
<br /><;ome of lr. largel tributanes. Lo..-:al dr3111age is ,hlelly
<br />u\to pot holes, snull llltenlUttent lakes, 3nd J few lalgel
<br />pernlanent IJ\..es.
<br />The l'ngla,;"lated ~orthe(n Plains sedion comprises
<br />the broJd rolhng area ....e~t of the "lSSOun Rlvtr in
<br />~Qnh and South D:.lkota. It 31so mcludes most of the
<br />ea,relll hJ1f ot \'ll'ntJna and. m'rtheastern Wy01mng.
<br />"umere1U' small hmy :ire as. buttes. Jod ho~ba.:ks reach
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