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<br />Information Required <br /> <br />Purpose or lmplicatfons of Data <br /> <br />Potential Sources of Informal ion <br /> <br />Possible Forms of Data <br /> <br />. Duratio'lofFfoodlr,g . Alfects seepage mlo buildings . Floodplain Technical Sludles . US Oepart'flenl of the Interior <br /> ard saturation of soils and . Hlstoncal Records Water and Power ResQJrc€s <br /> bUilding materials . Flood Insurance Studies Service (operales wesl of the <br /> . Affects the length of time faclll- Mlsslsslopl River) <br /> ties mignt be Inaccessible or <br /> Inoperable <br /> . Affects building design relative <br /> loorlentatlon configuration, and <br /> cf)()ICe of Iloodprooting techniques <br />. Frequencjiof Flooding .lnlluencessltechOlce . Floodplain Technical Studies <br /> . Affects choice oj floooproollng . HistOrical Records <br /> techniques espeCially those <br /> that requireinstallat,on before <br /> every flood <br /> . Indicates need for speCial access <br />. Cllmale and Weather . Indicates frequency and Iypeof . Wealher Service Records <br /> preclpltallonand In turn the . Historical Records <br /> type and magf1llude of Hooding <br /> thatlsllkelv <br />. Ground WalerLevel . Inlluences potential water . GeOlogic Surveys <br /> pressure on foollngs founda- . Sol~ Analysis Reports <br /> tlons and lloors. <br /> . Affecls site design techmQues <br /> for controlling 'Naler runoff <br />. Structu'al Flood Ccntrol Meas- . Existing measures canalfecl . FeaslbilitySludies <br />ures(e,g,damS,levees,chan- site If the hmlts of the flood con- . DeSign Specifications <br />nelimproveme'lts) Ird device are exceeded . Probability Reports <br /> . Proposed measures can, when <br /> i'11plemented, alter baSIC llood data <br /> <br />Information Required <br /> <br />Purpose or Implications of Data <br /> <br />Possibfe Forms of Data <br /> <br />Potential Sources of Information <br /> <br />. PhYSiographic Features . Affects locallon and magnitude . TopographiC Maps . Local Government Plarnlng <br /> of flooding on the site. . FloodplaIn Technical Studies Agency <br /> . Idenllfles areas 01 the site that . SiteSurl/eys <br /> should be avoided or protected . Local Governmen1 Munic'pai <br /> . Affects orientation, distribution, Engineer <br /> and denSity 01 built elements on <br /> Iheslte . State Floodplain Coordinating <br /> . Identifies physical constraints Agency <br /> and adl/antages for site devel- <br /> opment . State Oltice for Natural Re- <br /> sources <br />.T::;pog'aphy . Inffuences siting of buildings . TopographiC Maps <br /> . Indocales erosion p01ential . Floodplain Technical Studies . Soil Consefl/ahon Service 'J S <br /> . Indicates need/or. andfeasibil- . SlteSurl/eys Department of Agriculture <br /> Ityofuslng 1111 malerial on the site <br /> . Indicates appropnate site de- . U S GeologiC Survey <br /> sign tecnniques for COnlroiling <br /> water runoff . Regional AuthOrities <br />. SoHCharacl8'istlcs . SQlI porosity Influences the rale . Soil Maps . HydrologiC and Ol/il Englneer- <br /> of water runoff and flooding po- . Soil Analysis Reports iflg Consu~ants <br /> tentlal . Site Surveys <br /> .Oeter'T1inesthefeaslbilltya'ld . Surveys by Professlooal Staff <br /> design specifications for use 01 <br /> fill material to elevate bUildings . US Department 01 the IntellO' <br /> the use of backfill around10un- Water and Power Resources <br /> dat,ons and construction of Servlce(operates west 01 t'le <br /> earthberr"ls MISSissippi Rll/eL) <br /> . In::ka~es reqUired depth lor <br /> fo:)tings, pilings, Of columns <br />. SlopeStablllly . Affecls choice of bUilding sites. . AnalYSIS 01 combined effects of <br /> the use of fill matenal, and the topography and sod charac- <br /> deslg1 of foundations, footings. terlstics <br /> and pl!lngs . Site Surveys <br /> .In!luenceseroslon <br /> .Indlcatestheneedforter'acing <br /> or ground c,wer to protect slopes <br />. Vegetation . Aidsln control 01 wate"unoff . SiteSurl/eys <br /> ard thus can be alactor In re- <br /> duclng floodlrg leve,s <br />. Water Storage . Aldsin conlrolofwale<rUrloff . GeologiC. soil and hydrologIC <br /> ard t'lUS can be a faclor In re- surl/eys <br /> Clueing flooding levels . Site Surveys <br /> . Reeharges ground water supplies <br /> <br />~ <br />f <br />~ <br /> <br />n <br />1 <br />. <br />~ <br />u <br />.i <br />'" <br /> <br />51 <br />