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<br />APPENDIX A <br /> <br />ExloclnR Conditions <br />In this report, tills refaro to the present extent of urbanization <br />In the Sheep Draw basIn. Aloo undae thin condition the lrrtg8tlon <br />canal. and the small irrigation dams were Bosumed to be re~ved. <br />Roadways WerB aSHamed to remain In place. <br /> <br />Expected Probability <br />An adJuet~nt for the skewed distrlhution of the oample error <br />around the true population. <br /> <br />GLOSSARY <br /> <br />Flood <br />An overflow on lands th6t liCe not nor.....lly covered by water and <br />that canbl! used bYllllln. Flooda have tvo essentIal ,,-hllracterhtica, <br />the Inundation of land 10 temporary; and the land Is adjacent to and <br />inundatl!d byoverflo" frolllo river, Btreall,ocean, lake, or other body <br />of "tanding water. <br /> <br />Baaln CharacteriatlcB <br />Characteristics of a watershed that affect the relatlnnohlp <br />bet""en rainfall and runoff. Characte'htics C"ken troma topographic <br />map might include size and shape of tit, basin, overland slopes, stream <br />slopes, and th~ arran8~~ent of tributaries. Other char8~teri8tics <br />..lgl1t Include aotl and vcgetatlon. <br /> <br />Flood Boundsriea <br />The outer limits of the flood~d area for a psrticular flood, as <br />se~n on an aerial photograph or a map. Th~ flood may he an assumed <br />flood of . given diSCharge or a given chance of occurrence. It ..ay <br />also be drawn for a flood that haa already taken place. <br /> <br />Flood Crest <br />The ma~i..u.. stag~ or elevatioo reached by the waters of a flood at <br />a given location. <br /> <br />Coincident Flow <br />Th~ water level 00 a stream being studied may be affected by the <br />flow on another stream ~ich jol~s with th~ study atrea... An assump- <br />tion must be made of the flow occurring in the other stream when the <br />study atream 1s delivering ita peak dlachsree. <br /> <br />Flood Hazard Areas <br />Generllllyrefers to the IIrea aubject to flooda up to SOIDe <br />spec1fie<l...gnitude. <br /> <br />Confluence <br />The point where two or IOOre atreama join. <br /> <br />lIational I'IQodInaut8nce Frogra.. <br />The Federal Emergency Management Agency (FEMA) has Ldentified <br />flood-prone communitIes aod administers the National Flood Insurance <br />Frogram (NFIP). Communities that agree to join the XFIP adopt minimum <br />atandardatomitigatefloodlosaea. In return. the Federal Govern....nt <br />~ke8 flood inaurance available to property ownera at subaidized rates. <br />Loans or guarsnteea by Federal agenclea for constructtonare not <br />available In flood ha~9rd areas thst are tn non-NPIP flood-prone <br />comllllJnities. <br /> <br />CrossS"ctton <br />A surveyed line ~hat La g~ner8lly perpendicular to the directIon <br />ofth.. streallflow. It isus('d co show the topography of the flood <br />plainsnd the channel. <br /> <br />Detention Storage <br />The amount of rainfall and/or rainfall runoff whICh i8 Intercepted <br />by dltchea, ponda, or natural depr~~~lon8 and 1s therefore removed from <br />the normal surface-runoff pattern. <br /> <br />FloodPlain <br />Theretat1velynatareaOtlowland.sadj01ningthechannelofa <br />river, .strea,", watercourse, ocean, lake, or other body of Handing <br />..aterwhich ha9 been or may be covered by floodwater. <br /> <br />Discharge-Probability Relationship <br />The cho.necs (see "ProbabUlty") of floods of dIfferent .....gnlt"<I..a <br /><'lcc'" rl ng at a gt ven laeat Ion. Smaller floods .,re lIkc ly ~o occur 1lIOre <br />of ten, whll"Stn,ltE'r fl"')dsarslea9co"",,00, <br /> <br />flood Froflle <br />A frraph showb'g th.. r"ht1onahlp of wat"r surface elcvatlon to <br />lOC8~ion, the latter generally expreased "8 the dtatance upstream fro," <br />the mouth for a streal> of "'ater tIo..lng 10 all o""n channel. A flood <br /> <br />,-, <br /> <br />H <br />