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<br />fo' '),:wrmmm,.: No,,,/ H<<:llrn, <II, AI/"",,,' J.ilfl" tFE.\1A, 2000) [\ i. bailOd un IInd consistent
<br />with the NRC's rccommend~lions and i. adopted for use in this report
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<br />The procedure to identify and classify alluvial fans U'I<:' a jj:oomorphic-c'I1gm<<ring
<br />aPI'Toach to idemify and chllrack'riu flood hu.ard TOnes It is II three-step procedure for
<br />chllrlll.1criring the I.lldform. and associated 1100d hu.atds on areas j\Ubject to l100dinll on aclive
<br />IInd inactive alluvial fan. The procedure i. ooncemrd with relatively recent spans of lime, . lev.'
<br />decade. to. few hundred yeafll Associated tlood ha1.ards are pnrnarily ba.ed on II l00-year
<br />l1oooevl'l1\
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<br />Steps I and 2 IIrc oonmtcnl wilh the National R~rch ("DUllCi!'! Alllw;,,' hm F1.."ri,,'K
<br />(]Q96I. Ihe FEMA's Gu"l.dmf"..jt". !>'-,,'rmIllIllK Flo.", If=w, ,," AIIIIVIII/ NUI\' (2000), the
<br />l'lood Controll}istrict of Maricopa CO\Jnty'~ 1',..,lm/l/ll n"ul H,eurJ A~....~\.11I""'fi'" no.,,1
<br />I'I"j" .\f",,,,~"'mt'lllfi" .\f,UI<11f'" {"<>>"'(I' (I9<lH). iUld {Ithcf repa"s. in~estil!ation~. and rest'arch
<br />]n addition, r~ completion of steps I and 2 should satisfy rhe reconnaissance requiremenn of
<br />FEMA's Manual J7 enlitlod GUl<kl",ev ",ki .""""lji<'illU"'Jor Slm}}' ('0/111'''00'',< (1995) for
<br />investi~a,inl! an allu~ial fan Srep 1 is con5i~'('nr wilh good flood plain management practices.
<br />and with t'EMA National Flood InsurllIlcc PrOllram's44 erR 65_]l (rEM:\, 1990) The i<lep~
<br />are summariled below and di'ICU.sed inmorcdt1ail in.-\pJ"'ndi.C
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<br />Step I. ReeOJ;:niu Mnd eh.netl'riu thl' '\lIu,'ial hn Srep I uses chara.ctcti~1ics such
<br />IS tllJX'~aphy and \Illiltype to determine whether or nOl a particular landfonn is an alluvial fan
<br />This is a quick assessment of the landform using topographic maps, geologic maps, soil maps
<br />and!lU"'eys,a~ialphotograpl1s.andlorlicldreconnaissance .'illllrl'1showsasample
<br />topowaphic map \,fan alluvial f.n
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