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<br />TABLE 3
<br />
<br />!!!!IT9RYOFFLOODING
<br />
<br />HISroRICAl.FLOO'DPEAKDlSCHARCES
<br />
<br />Convective type rhund"rstor",s occur pxtensiv,,1y OVf'r the
<br />Gunnison River basin during the gumrner month~. The aerial extent of
<br />such stOring is generally limited and do not c~u~e peak flows in the
<br />ba~in. Snowmelt ~enetal1y occurs durin~ the April-June season, a period
<br />duting which precipitation i~ oh"erved to be 10" at most weathpt sta-
<br />tions. However, occaBBional ~enera1 storms eBn occur during this period
<br />of time. PrecipitBtion during these general storm period~ "ilt hO' of an
<br />orographic type, ~ith higher elevations receiving thO' heaviest prO'cipi-
<br />tation. Storms of a tropical origin, such as the Octobet 1911 storm,
<br />occasionally cause very heBvy precipitation. However, these typeB of
<br />storms are restri~ted to the fall period and do not cause peak flowa in
<br />the basin.
<br />
<br />Gunni80n River near Gunnison, Colorado
<br />
<br /> Year Date Dlscharl'\e (ds)
<br /> 1912 June 6 5,880
<br /> 1914 June_ , 5,680
<br /> 1917 June " 6,250
<br />i 1918 June D 11,400
<br />1920 June n 7,680
<br />,
<br />, 1921 June " 6,600
<br />I 1922 "" ;0 5,200
<br />, 28 5,330
<br />I 1923 ""
<br />1927 M., " 5,090
<br />I 1928 May ;0 5,750
<br />1948 !{ay22 5,600
<br />I 1949 June 19 5,190
<br /> 1952 June 16 5,710
<br /> 1957 July 1 9,320
<br />
<br />Streamflow records are available at lo~ationa near and within
<br />the study reach. Recorded flows show maximum discharges of 11,400 cfa
<br />and 1,900 ds for Gunnison River near Gunnisun and !ollll~hi Creek 'lt
<br />Gunnison streamU"" recordinl! stationa. Theae flowa occurred on June 13 ,
<br />1918 and June 8, 1957 respectively, Inapectionofthepteeipitation
<br />records for June i<)18 and June 1957 tndi..."te th"t no ,,-ppu'd"hl.. !'yp_
<br />cipitation waa recorded above the study reach during the period im-
<br />mediately preceding the peak runoff date, Sinee Septemher 1937, the
<br />flo~a of Taylor River have been regulated by the Taylor Park Reservoir,
<br />thus affectin~ the natural flows in the study reach. An inspection of
<br />the records indicate that maximum f1o~a oceur in the Gunniaon River
<br />
<br />Tomichi Creek at Gunniaon, Colotado
<br />
<br />'lear
<br />
<br />Date
<br />
<br />Djsch'":~e (ds)
<br />
<br />basin during the spring snowmelt period and are occasionally au~nted
<br />by rainstorms. Table) shows hietorica1 peak discharges and dates
<br />associated with them.
<br />
<br />!Q39
<br />1942
<br />1948
<br />1949
<br />1952
<br />1957
<br />1958
<br />1965
<br />1970
<br />1973
<br />
<br />March 24
<br />May 28
<br />May 25
<br />June 20
<br />June 12
<br />June 8
<br />May 26
<br />JuneD
<br />May 23
<br />June 15
<br />
<br />1.530
<br />1,350
<br />1,280
<br />1,320
<br />1,360
<br />1,900
<br />1,380
<br />1.161'l
<br />1,690
<br />1,520
<br />
<br />n
<br />
<br />"
<br />
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