Boyer -- Cataloging Unit 10230007

• Missouri-Little Sioux Subregion 1023
  
• Missouri Region 10 (There are 310 cataloging units in this region.)
  The state composition by area is 100.0% Iowa.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 2808.1 km² ( 1084.7 mi² ) [% in USA = 42.68, % in Region = 34.84]
  The area from the USGS is 1080 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 274)

  IV. Elevation Analysis

  This analysis is based on 1121623 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 399.9 m ( 1312.0 ft ) [% in USA = 49.74, % in Region = 15.81]
  The elevation standard deviation is 35.1 m ( 115.2 ft ) [% in USA = 27.05, % in Region = 14.19]
  The coefficient of variation is 8.8 %.
  The vertical relief is 184.1 m ( 604.0 ft ) [% in USA = 25.96, % in Region = 13.23]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	300.8	348.9	373.3	386.1	396.4	409.4	412.9	424.9	427.2	441.0	484.9
  feet	986.9	1144.7	1224.7	1266.7	1300.5	1343.2	1354.6	1394.0	1401.6	1446.8	1590.9

  

  V. Map Line Analysis

  Note- percentiles are for the feature density, not for the raw total lengths.
  

  line type	km	mi	km/km²	mi/mi²	% in USA	% in Region
  Perennial Shoreline	81.7	50.8	0.029	0.047	25.49	33.55
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	8.71
  Perennial Streams	885.9	550.6	0.315	0.508	59.40	88.06
  Intermittent Streams	1631.2	1013.8	0.581	0.935	77.93	54.19
  Canals	10.5	6.5	0.004	0.006	55.42	57.10
  1° roads	15.7	9.8	0.006	0.009	49.27	64.19
  2° roads	172.9	107.4	0.062	0.099	90.34	97.10
  3° roads	148.4	92.2	0.053	0.085	49.17	72.90
  4° roads	3441.4	2138.8	1.226	1.972	56.23	84.84
  Total Roads	3778.3	2348.2	1.346	2.165	55.33	83.23
  Railroads	276.3	171.7	0.098	0.158	86.59	94.84
  Pipes and Powerlines	80.5	50.0	0.029	0.046	49.41	67.42

  
  Of the natural water in this HUC, 62.77% (by length) is intermittent [% in USA = 63.48, % in Region = 30.00]

  VI. Other sites

  • EPA- Surf Your Watershed - Index of Watershed Indicators
  • USGS- Science in Your Watershed - Selected Realtime Streamflow Stations
  • CTIC- Known Your Watershed

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  1999 SEPT 4, Last updated on 2003 JAN 23
  
  D.L. Gustafson, dlg@rapid.msu.montana.edu