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<br /> <br />.'\0...... <br />.~- ~ .. <br />. :~~~~-- --.:-- <br />... -'.. .~_. - ..:-. ~ ~-" .-. <br />. .~.....__~._ 1 _.' <br />, ..... ~. ~__'_, i4' _.- <br />- ", . ~ . ., - ~. <br />_~.... ,~_ .~~ .......:iC,..,.... -.... <br />~'- .. ...~' ...,~,_...\.;..~.....#. --~ <br />" ".--..,;....;, ..'..-..-.....~. ~~__'.""~ ......,r v. <br />.. -...,. ,- . --, ~-.....--~. - <br />. ""'~""'" .,.._.'.;0_'.__',__...., tip. A <br />.. .~~_' '~,,;_,~,\,,_"'.d":_\_"; ').". .:.. <br />.I.- ." ~" "} '..-"\'>:,,- ""';~:'\""\"~~~" .......~., ~: <br />....#. ~\."- . ..-. .".. -". ~-_.'" \:. <br />',I.;;l':"'''l!.:.\_''.~,\--. - "',(1"".~'i>., n" .......,......~'....&- <br /> <br />r,-I <br /> <br />'., <br />, <br /> <br />Thl.' lo.....l:mds produ.;'e appreciable amounts of annual <br />runoff and !lood oc.;urrences arc relatlw]y hIgh. Most <br />streams in the area for whkh fL'..:ords are available have <br />:iVerage annuJ.1 runoff in the range of fUllT 10 eIght <br />inchl.'s. In general. low !lows In the sttCJms are dt'rived <br />from shallow groundwater supplies thaI are lImited b~ <br />and dependellt UPOII thl" 1000'al infiltrallon of pre.:iplta. <br />lion. Floods are semHlashy on small streams and are <br />modl"rate on Ihl" larger strl'ams. Storm rainfall is the <br />primary cause of !1oods. and ice jams are nut a signitl. <br />cant factor in flooding. <br /> <br />DEMOG RAPHY <br /> <br />Historically. the Sl"llJemcnl uf the \liss~lUri River <br />Basin has bel"n related diredl~ to its abundan..::c of rutu. <br />ral wealth. panicularly its agri.:ultural and mlJ1eral reo <br />sources, Thl" potentiah of the Central lowlands and <br />the eaSIl"fT1 portion of thl" Great Plallls :md the Rocky <br />.\1ountain foothills attrJdl'd the liveslO~'k men; and the <br />minerJI wealth of the Rockies themselws brought the <br />miners. <br />Eadl of theSt' settlement groups spJwned cities and <br />towns 10 scrvicl.' their nt't'ds. Some ofthe>e urban all\('rs <br />went on to be,'mnt' glOwing regiunal ':l'nters and "<lme <br />soon b~'<'ame ghost town" when their economi.: hase dls, <br /> <br />. <br /> <br />- -- <br /> <br />'" <br />, <br /> <br />.' <br /> <br />11 <br /> <br />" . <br />-r <br /> <br />., <br />,.- <br /> <br />appeared. This process of growth. re.:ession. and death is <br />still mu.:h in e\'idence within the basin. <br /> <br />Populatton shifts have been constant throughout the <br />baSin's history Dr"ughts. eCt)nomic l1uduations. me.:h. <br />anilatLOn. and urbanu.alion have all affected the baSin. <br />The result has been a large out-migration of the rural <br />popul;Jrion. rapid gJOwlh in the largl' metrupulitan areas. <br />mixed rates of growth in the srnalkr cities and towns. <br />and an increaSf In industrialil.alion (plate II. <br /> <br />In lllbO. ahout 3.4 million people. or ...2.5 per.:ent of <br />the basin's populalion hved III rurJ! areas or \owns of less <br />than 2.500. The remallllllg 4,5 million people lived in <br />urban and metropolitan areas having populalions of <br />:::.500 or more. including the 37.2 perl'enl of the basin's <br />population living in 11 slanddrd metropoli!an statislical <br />areas (5\15:\ 's) ltable ~l. <br /> <br />The total populatlon of the :\li;;oUTl B:lsin increased <br />17 percent belween ilMO :lnJ 1<>60. Durlllg this period, <br />rural population de..'rea~ed ] 7 per<'l'nl and urban popula. <br />tlon lII.:reaSfd tiS percen\. Improved transportatiun and <br />l'01nmuni..'ation fadltlies. impmved equipment and te.:h- <br />nology in agriculture. increased emphasis on manufac- <br />luring ;l.di\'iries. and increa~ed demands for re.:realion <br />are some of the fa.:lOrs that intluenl'ed divl"rgem rates of <br />growth ;md .Jufb of population within the h<lsin (see <br />11g11f;;'s 6 and 71. <br /> <br />~bny Communities H3d Their Heyday Such a~ This Gho~t ~tining TO.....'Tl <br /> <br />11 <br />