FLOOD04244

• County: Ouray
• Stream Name: Uncompahgre River
• Basin: Gunnison
• Title: Hydrology Addendum to FIS Ouray County Unincorporated Areas
• Date: 7/3/1985
• Prepared For: Ouray County
• Prepared By: Montgomery Watson
• Floodplain - Doc Type: Floodplain Report/Masterplan

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5 17 1986 272 . 29 ~96l 298. 67.44
5 13 1987 47l. 30 197:!. 298. 69.77
6 29 1988 423. 31 1986 272 . 72.09
3 8 1989 134. 32 1967 269. 74.42
5 3 1990 182. 33 1959 241. 76.74
8 2 1991 238. 34 1991 238. 79.07
5 31 1992 340. 35 1966 236. 81.40
4 26 1993 218. 36 1993 218. 83.72
6 22 1994 120. 37 1990 182. 86.05
7 10 1995 368. 38 1980 170. 88.37
4 9 1996 108. 39 :'..956 146. 90.70
6 9 1997 473. 40 1989 134. 93.02
7 8 1998 463. 41 1994 120. 95.35
7 31 1999 3960. 42 1996 108. 97.67
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-SKEW WEIGHTING -

BASED ON 42 EVENTS, MEAN-SQUARE ERROR OF STATION SKEW .212
?~~~~~!..\lR INPUT MEAN--;SQUARE ERRO~.<?F.GE~~LI~~I? SKEW .302

PREL~MINk~Y RES0LTS

-FREQUENCY CURVE- DALLAS CREEK NEAR RIDGWAY, CO.
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COMPUTED EXPECTED PERCENT CONFIDENCE LIMITS
CL~VE PROBABILITY CHANCE .05 .95
FLOW IN CFS EXCEEDANCE J FLOW IN CFS

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....~

3610. 4440. .2 6160. 2470.
2700. 3140. .5 4340. 1920.
2~50. 2400, 1.0 3290. 1580.
1680. 1830, 2.0 2460. 1280.
1190. 1250. 5.0 1620. 939.
885. 912. 10.0 1150. 722.
634. 643. 20.0 784. 531.
355. 355. 50.0 419. 300.
215. 213. 80.0 257. 173.
170. 167. 90.0 207. 132.
142. 139. 95.0 176. 108.
105. 100. 99.0 135. 75.
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SYSTEMATIC STATISTICS

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~ LOG TRANSFORM: FLOW, CFS

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NUMBER OF EVENTS
" .....................~~
~ ~EAN 2.5739 HISTORIC EVENTS 0
STANDARD ~EV .2821 HIGH OUTLIERS 0
COMPUTED SKEW .9365 LOW OUTLIERS 0
REGIONAL SKEW 1000 ZERO OR MISSING 0
ADOPTED SKEW .5000 ) SYSTEMATIC EVENTS 42
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~~'AAA FINAL RESULTS

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-PLOTTING POSITIONS- DALLAS CREEK NEAR RIDGWAY, CO.
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EVENTS fu~ALYZ~D 1 ORDERED EVENTS
FLOW WATER FLOW WEIBULL
~ MON DAY YEAR CFS Rfu~ YEAR CFS PLOT POS ~
c~A~AJ..AAA~~AAAAAAAAAAAAAAAA'AA'Jl
~ 4 30 1922 518. 1 1999 3960. 1.27
8 15 :923 1120. 2 1923 1120. 3.09
5 23 1924 996. 3 1983 998. 5.46
4 17 1925 504. 4 1924 996. 7.84
4 23 1926 306. 5 1984 680. 10.22
6 28 1927 478. 6 1965 556. 12.60
4 :2 1956 146. 7 1963 550. 14.97
7 29 1957 509. 8 1922 518. :7.35
4 22 1958 399 9 1957 509. ~9.73
8 4 1959 241. 0 1925 504. 22.:1
4 10 :960 39:. 1970 491. 24.48
6 30 :961 298. 2 :927 478. 26.36