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<br />~t <br />I( <br />I <br />I <br />I <br />I <br />I ' <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br /> <br />II' <br /> <br />1.11 <br /> <br />.. <br />~ ,.)\<:.-., <br />: ,:~ " <br />... . , <br /> <br />1.71 <br /> <br />JjQ' <br /> <br />- <br /> <br />II" <br /> <br />12" <br /> <br />T-t.-- <br />I <br /> <br />1M <br /> <br />I <br /> <br />,__U.s.__c1gbl_ Missouri <br />I,J,.~ 1111 0 20 40 <br />T__"- I" <br />bot. 0 ill ~ io ICI.OUETEAS : <br /> <br />EXPLANATION <br /> <br />~ AREA OF EQUAL 2-YEAR, 24-HOUR PRECIPITATION <br />INTENSfTY-Nuni>er is preciplation inIensiy, in incites <br /> <br />FIgure 5. Distrlbution of 2-year, 24-hourprecipitallon InIensIyfo..r Iowa and_southern MInnesola.. <br />---. . _.'_~ __.___. .. Eta~ . ----__ <br /> <br />reference and the cartographic data source used <br />for both GIS procedure and manual <br />measurements. <br /> <br />Verification of Drainage-Basin <br />Characteristics <br /> <br />To verify that the drainage-basin <br />characteriatica quantified using the GIS <br />procedure are valid, manual topographic-map <br />measurements oC selected drainage-basin <br />characteristics were made for 12 of the <br /> <br />streamflow-gaginc stationa used in the <br />drainage-basin f100d-eatimation method. 'n1eae <br />comparison meaaurementa were made for thoae <br />primary draiDap-buin characteriatica <br />identified.. being significantly related to flood <br />runoff in the multiple-regreaaioD equationa <br />presented in the following section entitled <br />"Drainage-Basin Characteriltic EquatiOIll.. <br />Comparison measurements were made from <br />topographic maps oC the same scales .. were <br />used in the GIS procedure. The results of the <br />comparisons are shown: in table 1. <br /> <br />IIlTDIATDlG DESIGN.FLOOD DISCIII'W''' UIIIIIG DIIAIHAGIl-aAIII CIIAIIACTE8I811C8 .. <br /> <br />-......' . ~ ~ . - ~ <br /> <br />~.~ -- <br /> <br />- ~- <br />