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<br />STREAM SIZE <br />(SECT, 2.2.1) <br />FLOW HABIT <br />(SECT,2,2,2) <br />BED MATERIAl. <br />(SECT, 2,2.3) <br /> <br />VALLEY <br />SETTING <br />(SECT, 2.2.4) <br /> <br />FLOODPlAINS <br />(SECT.2.2.S} <br /> <br />NATURAL <br />LEVEES <br />(SECT, 2.2.6) <br /> <br />APPARENT <br />INCISION <br />(SECT,2,2,7) <br /> <br />CHANNEL <br />BOUNDARIES <br />(SECT, 2.2.8) <br /> <br />TREE COVER <br />ON BANKS <br />(SECT, 2.2.8) <br /> <br />SINUOSITY <br />(SECT,2,2.10) <br /> <br />BRAIDED <br />STREAMS <br />(SECT. 2,2,10) <br /> <br />ANABRANCHED <br />STREAMS <br />(SECT. 2,2.11) <br /> <br />VARIABIUTY <br />OF WIDTH AND <br />DEVELOPMENT <br />OF BARS <br />(SECT. 2.2.1 ,~) <br /> <br />Small <br />(<30 m wide} <br /> <br />...~- <br />Medi\~,') <br />(30'15(~. <br /> <br />(lntennittant) Perennial but ll~lhy <br /> <br />) <br />'"J <br />tllder <br />~ <br />'" <br />-" <br />lief <br />deep) <br />~ <br />.. -- <br /><:] width) <br />-g <br />- - <br />both banla <br />ill <br />uvial <br />llDldine <br />~ <br />Meandering <br />>2.0} <br />~ <br />~ <br />raided <br />:ent' <br />~' <br />~ <br />~)ched <br />::ent <br />~ <br />J variation <br />bar> <br /> <br />GEOMORPHIC FACTORS THAT AFF=ECT STREAM STABILITY <br /> <br />VVid.e <br />(> 150 OJ <br /> <br /> <br />Peral.n1 <br /> <br /><3 <br /> <br />Silt-Oay <br /> <br />Silt <br /> <br />Gravel <br /> <br />C.ebble or Ho <br /> <br /> <br />~ <br /> <br />[~:J <br /> <br />CS~ <br />Hi@re <br />(> 300 m <br /> <br />Low relie! valley Moderate ..elie! <br />(< 30 m deep) (30-300 m deep) <br />~""".........c~.. ,,,;;::_. <br />__... "," n., e..::......; . <br />-- .".- ...., <br />. ..:.. .....n. <br /> <br />~-'i""~'''';;'';::: <br />. ....... ......;>, <br />. -:::-:.. -:;~':.';c:.= <br />.......... <br /> <br />N arl'C)W <br />(2-10 x chan~d width) <br /> <br />Wide <br />(> 10 X ch3l:lI1 <br /> <br />~,',", ;::q ~7, <br />~. ~~ <br />little orn01\e Mainly (:~.~ncave _ .Well developed 01\ <br />~~ ~~ <br /> <br />Notlncised ~ Probablylnc..ed <br />.-- - <br /> <br /> <br /> <br />~~"~2J <br />~~;_:.ar~:!:m <br /> <br />~.. -<< <br />-. .... <br />,II ' <br /> <br />Semi-alluvia! <br /> <br />Non..all <br /> <br />Alluvial <br />< 50 percent of bllDldine ) <br /> <br />50-90 percent of bankfuJ.e <br /> <br />> 9llpercentcfb <br /> <br />~~ <br /> <br />Highly <br />.J <br /> <br />~ ~-; <br />------.-:::: ..~~ <br />Not braided Generally b <br /><5 ercent ___.~fuer <br /> <br />~ ~~"'~ o?~~ <br />Not anabranched Locz.11v anabr,lnched GeneraJlv ana <br />(<5 percent) (5-35 perce"n (> 35 per <br />~rJ1~~~ . ~r <br />Eq'llWldt.'l __ ,w,ce'.tbends)l ~dor <br />/-='".".:// .......~~ _10. <br />/.:~C~ ~j::=-_ <br />;-:..:- <br /> <br />A <br /> <br />Narrow int bars <br /> <br />Irregular- poi?t and lateral <br /> <br />Wi::: ooint bar;, <br /> <br />4.9 <br />