Lower Illinois -- Cataloging Unit 07130011

• Lower Illinois Subregion 0713
  
• Upper Mississippi Region 07 (There are 131 cataloging units in this region.)
  The state composition by area is 100.0% Illinois.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 5938.3 km² ( 2293.8 mi² ) [% in USA = 86.07, % in Region = 91.60]
  The area from the USGS is 2280 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1529)

  IV. Elevation Analysis

  This analysis is based on 2371991 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 179.6 m ( 589.2 ft ) [% in USA = 22.41, % in Region = 8.40]
  The elevation standard deviation is 26.8 m ( 87.9 ft ) [% in USA = 18.33, % in Region = 39.69]
  The coefficient of variation is 14.9 %.
  The vertical relief is 138.0 m ( 452.8 ft ) [% in USA = 16.11, % in Region = 26.72]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	124.0	134.0	152.0	168.1	182.1	183.0	186.6	194.4	201.0	213.0	262.0
  feet	406.8	439.6	498.7	551.5	597.4	600.4	612.2	637.8	659.4	698.8	859.6

  

  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	723.7	449.8	0.122	0.196	63.00	48.85
  Intermittent Shoreline	31.0	19.3	0.005	0.008	77.17	86.26
  Perennial Streams	2083.8	1295.1	0.351	0.565	64.57	87.79
  Intermittent Streams	3228.9	2006.7	0.544	0.875	74.56	80.92
  Canals	38.0	23.6	0.006	0.010	61.01	51.91
  1° roads	79.3	49.3	0.013	0.021	60.11	52.67
  2° roads	129.9	80.8	0.022	0.035	44.62	29.01
  3° roads	475.0	295.2	0.080	0.129	64.99	47.33
  4° roads	7119.2	4424.6	1.199	1.929	54.10	35.11
  Total Roads	7803.4	4849.9	1.314	2.114	52.68	34.35
  Railroads	431.8	268.3	0.073	0.117	75.23	55.73
  Pipes and Powerlines	187.2	116.4	0.032	0.051	52.82	54.96

  
  Of the natural water in this HUC, 53.73% (by length) is intermittent [% in USA = 54.33, % in Region = 64.12]

  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