HCDN: Streamflow Data Set, 1874 - 1988
By J.R. Slack, Alan M. Lumb, and Jurate Maciunas Landwehr
USGS Water-Resources Investigations Report 93-4076


Description, qualifying comments, and acceptable water years.

Drainage area is 14038 sq.mi.                           Datum is 547.36 ft.
Located in hydrologic unit 07080107 at Latitude: 40:43:40N  Longitude: 091:57:34W
Station is in the state of IA (county code 177) and serviced by the IA office.
Channel slope is 2.08 feet/mile
Stream length is 464.00 miles
Mean basin elevation is 1100.00 feet above National Geodetic Vertical Datum
Percent of contributing drainage area covered by 
   Storage: 0.64%     Lakes: 0.64%        Forests: 5.70%      Glaciers: N.A.%
Soil infiltration index is 3.00 inches
Annual precipitation is 30.70 inches
Precipitation intensity is 3.20 inches/24 hour (expected on the average once each two years)
January minimum temperature is 10.50 degrees Fahrenheit
Comments and qualifications on the data:
   Only monthly discharges should be used prior to October 1930 due to rough estimates of flow for missing or
   ice-affected record. Some diurnal flucuation at medium and low flows, prior to January 1959 and since November
   1960, caused by power plant at Ottumwa. Flow regulated by Lake Red Rock, 91 miles upstream since March 12, 1969.

Daily and longer averages for 59 water years are acceptable (some whole years and all partial years are excluded).
A water year with acceptable data is indicated by an asterisk in the time line, which spans 1874 through 1988.

                                                   Water year
1     1         1         1         1         1         1         1         1         1         1         1       1
8     8         8         9         9         9         9         9         9         9         9         9       9
7     8         9         0         1         2         3         4         5         6         7         8       8

The streamflow data Daily values, monthly mean values, and yearly mean values of streamflow data are available in tablular form. Select the desired option from the list below.

The data tables do not have column heading for ease of reading into statistical programs. For a detailed description of the format of the data tables, select the corresponding file from the list below.

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