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<br />depth 01 Iloodwators inmost Inst<lnces ~nd 110<1 conditions "'"y anrn~r <br />decertlvely safo. Ovcn~nk flews are esrecially dan~erou~ ur5tre~m ()I <br />Refc,enceroint 33 ",hp.re the Iloodolain Isrclativ"lyn'lrr""'ln:lthe <br />velocitie~ are high. <br /> <br />Rate 01 ,iso and duration of Iloodlng-Floods in the <br />study reach can rosult from storm ralnlall alone or Incorminatlonw ith <br />sno.;m<ll t rU;lOfl In the sprIng 0, ear I y summer. re~king tlmes for f 101'5 <br />of theCachslaPo\ldreRlveratFortCollln5,cau5sdbyheavyrainlali <br />runoff, are approx irnately 6 ~O\lr5. DuratIon of t lood 1"9 from this type <br />of runoff ~ould be nearly 30 hours. When snowmelt runoff is combined <br />with ra Infa II runofl the duration of t loodl "9 ~ou Id be conslderat> Iy qreater. <br /> <br />23 <br />