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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, 2,2,5) <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, 2.2,6) <br /> <br />TREE COVER <br />ON BANKS <br />(SECT, 2.2.8) <br /> <br />SINUOSIlY <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 />VARIABIUlY <br />OF WIDTH AND <br />DEVELOPMENT <br />OF BARS <br />(SECT. 2.2,12) <br /> <br />Small <br />(<30mwide) <br /> <br />Ephemeral <br /> <br />Silt-Cay <br /> <br />~-' <br />.' .--:...:~ <br />::::;:,::.,;.>>>,;.~.:::: <br />No valley; alluvial fan <br /> <br />~ <br />---";.--- ,"" <br />--- .,;.. <br /> <br />little or none ., <br />( < 2 x channel width I <br /> <br />,~ <br />, <br /> <br />little or none <br /> <br />Medium <br />(30-150 m) <br /> <br />Wide <br />(> 150m) <br /> <br />(Intennitt3l1t) <br /> <br />Perennial but flashy <br /> <br />Perennial <br /> <br />Silt <br /> <br />Sand Gravel <br /> <br />Cobble or Bould.er <br /> <br />~ <br />--- <br />,,~t:.' <br /> <br />~'::J- <br />'n <br />'" <br /> <br />~ <br />Low relief valley <br />(< 30m deep} <br />~. ~ <br />~ ~;:t':~<'~1 <br /> <br />Moderate relie! <br />(30-300 m deep) <br /> <br />HiRb relief <br />(> 300 m de.p) <br /> <br />~Y':'&;"""~~ <br />\...._:i:-.~:n~~ <br /> <br />Narrow . <br />(2-10 x channel WIdth) <br /> <br />Wide <br />(> 10 x channel.lidth) <br /> <br />~:'~~1 <br /> <br />~4?~ <br /> <br />MainJy on con"""" <br /> <br />wen dew10ped on both banIcJ <br /> <br />~~~--~~ <br /> <br />Not Incised <br /> <br />~ <br />=-~.-::... ''i{':;::=' <br /> <br />Probably Incised <br /> <br />(E!~ <br />:" ..~.~:=. <br /> <br />~~ <br />-.; 1-";'~-U_iJ <br /> <br />~..~ <br />:" .;--.......,....... <br />...., -' -...... <br />11",,' -. " <br /> <br />Alluvial <br /> <br />< 50 percent of banldine <br /> <br />Strai.ht <br />Sinuositv'IT:1,05) <br /> <br />~ <br />iNot braided <br /><5 ~rcent\ <br /> <br />~ <br />N9t anabran<f!ed <br />\ <5 percenu <br /> <br />Semi-alluvial <br /> <br />Non-a1luvb~ <br /> <br />50-90 percent of banldine <br /> <br />> 90 percent of banlcline <br /> <br />- ---- <br /> <br />~ <br /> <br />~~ <br /> <br />~ <br /> <br />Siml0US <br />(1.06-1.25) <br /> <br />Meandering <br />(1.25-2.0) <br /> <br />Highly Me8Jodering <br />(>2.C1) <br /> <br />~ <br />Loca[ly braided <br />(5-35 oercont) <br /> <br />~ -=-"-S <br /> <br />-_ -_._'"'=S <O~... <br />--...... ..".... -= ..",..-- <br /> <br />Generally braid"d <br />(> 35 percent" <br /> <br />~~. <br />GeneralIv anabran'ched <br />(> 3S percent) <br /> <br />Locallv anabranched <br />(5-35 percent) <br /> <br />~ <br /> <br />Equiwidth <br /> <br />~ <br /> <br />~~ <br /> <br />Wider at bends <br /> <br />Random varilation <br /> <br />fit <br /> <br />Narrow ooint bars <br /> <br />~ <br /> <br />~ <br /> <br />Irregular point and lateral bar.; <br /> <br />Wide point bars <br /> <br />GEOMORPHIC FACTORS THAT AFFECT STREAM STABILITY <br /> <br />2.4 <br />