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<br />Southern Arizona Region 13
<br />
<br />Q2 = 1O(6.38-4.29AREA "-0.06)
<br />Q5 = 1O(5.78-3.31AREA"-(l.08)
<br />QIO = 1O(5,68-3,02AREA",0.09)
<br />Q25 = 1O(5.64-2,78AREA"-O,lO)
<br />Q50 = 1O(5.57-2.59AREA"-O.lI)
<br />Q 1 00 = 1 O(5.52-2,42AREA ",0,12)
<br />
<br />Upper Gila Basin Region 14
<br />
<br />Q2 = 583AREA0.588(ELEV/I,OOOrl.3
<br />Q5 = 618AREA0.524(ELEV/I,OOOrO,70
<br />QIO = 36IAREA0,464
<br />Q25 = 58IAREAO,462
<br />Q50 = 779AREAo.462
<br />QIOO= I,OIOAREAO,463
<br />
<br />Upper Rio Grande Basin Region 15
<br />
<br />Q2 = 18,700AREAo,730(ELEV/I,OOOr2,86
<br />[(LONG-99)/1O)]2,8
<br />Q5 = 3I,700AREAo.646(ELEV/I,OOOr2,67
<br />[(LONG-99)/1O)f-7
<br />Q 1 0 = 26,OOOAREA 0.582(ELEV II,OOOr2,27
<br />[(LONG-99)11O)]2,7
<br />Q25 = 34,800AREA0.532(ELEV/I,OOOr2,15
<br />[(LONG-99)/IO)P,6
<br />Q50 = 44,200AREA0.501(ELEV/I,OOOr2.l1
<br />[(LONG-99)/IO)P.5
<br />QIOO= 9I,800AREAO,439(ELEV/I,OOOr2,22
<br />[(LONG-99)/I0)]2.5
<br />
<br />
<br />Southeast Region 16
<br />
<br />Q2 = 14AREA0.5I(EVAP_ 32)0.55
<br />Q5 = 37 AREA O,48(EVAP _ 32)0,63
<br />Q 10 = 52AREA 0,47 (EV AP _ 32)0.67
<br />Q25 = 70AREA 0,48(EVAP _ 32)0.74
<br />Q50 = IIOAREA0,47(EVAP_ 34l,74
<br />Q 1 00 = 400AREA O,50(EV AP _ 37)0,45
<br />
<br />Reference
<br />
<br />Thomas, D.E., Hjalmarson, H.W., and Waltemeyer, S.D.,
<br />1993, Methods for estimating magnitude and frequency
<br />of floods in the southwestern United States: U,S. Geo-
<br />logical Survey Open-Pile Report 93-419, 193 pages.
<br />
<br />Additional References
<br />
<br />V.S, Weather Bureau, 1959-61. Climates of the States: V,S,
<br />Department of Commerce, Weather Bureau, Climatog-
<br />raphy of the United States, no, 60 [section for each
<br />State),
<br />
<br />U,S. Weather Bureau, 1963, Normal annual precipitation
<br />(1931-60) for the States of Arizona, Colorado, New
<br />Mexico, Utah: V.S, Department of Commerce,
<br />Weather Bureau maps, scale 1 :500,000.
<br />
<br />F
<br />
<br />182 Natlonwlda Summary of U.S. Geological Survey Regional Regrasslon Equallons for Estimating Magnitude and Frequancy of
<br />Flooda for Ungagad Sites, 1993
<br />
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