Monona-Harrison Ditch -- Cataloging Unit 10230004

• 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 2454.7 km² ( 948.2 mi² ) [% in USA = 32.35, % in Region = 24.19]
  The area from the USGS is 954 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 234)

  IV. Elevation Analysis

  This analysis is based on 979503 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 380.8 m ( 1249.3 ft ) [% in USA = 48.46, % in Region = 14.19]
  The elevation standard deviation is 41.4 m ( 135.8 ft ) [% in USA = 32.69, % in Region = 19.35]
  The coefficient of variation is 10.9 %.
  The vertical relief is 150.0 m ( 492.1 ft ) [% in USA = 18.10, % in Region = 3.87]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	314.0	322.0	327.0	351.0	375.0	389.0	397.4	411.0	423.3	429.5	464.0
  feet	1030.2	1056.4	1072.8	1151.6	1230.3	1276.2	1303.8	1348.4	1388.8	1409.1	1522.3

  

  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	59.5	37.0	0.024	0.039	22.55	27.42
  Intermittent Shoreline	0.8	0.5	0.000	0.001	39.27	15.16
  Perennial Streams	583.4	362.6	0.238	0.382	46.47	75.48
  Intermittent Streams	567.2	352.5	0.231	0.372	35.67	9.35
  Canals	268.1	166.6	0.109	0.176	93.04	94.52
  1° roads	15.2	9.4	0.006	0.010	49.98	65.81
  2° roads	35.9	22.3	0.015	0.024	34.25	37.42
  3° roads	141.2	87.7	0.058	0.093	52.82	76.13
  4° roads	3035.1	1886.4	1.236	1.989	57.37	86.13
  Total Roads	3227.4	2005.8	1.315	2.115	52.96	80.65
  Railroads	97.1	60.3	0.040	0.064	48.98	68.39
  Pipes and Powerlines	144.7	90.0	0.059	0.095	78.16	92.58

  
  Of the natural water in this HUC, 46.91% (by length) is intermittent [% in USA = 49.03, % in Region = 15.16]

  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