Lower Illinois-Lake Chautauqua -- Cataloging Unit 07130003

• 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 3936.9 km² ( 1520.7 mi² ) [% in USA = 64.00, % in Region = 58.78]
  The area from the USGS is 1520 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1260)

  IV. Elevation Analysis

  This analysis is based on 1572853 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 175.7 m ( 576.4 ft ) [% in USA = 22.03, % in Region = 6.87]
  The elevation standard deviation is 28.2 m ( 92.5 ft ) [% in USA = 20.32, % in Region = 46.56]
  The coefficient of variation is 16.1 %.
  The vertical relief is 117.0 m ( 383.9 ft ) [% in USA = 11.56, % in Region = 12.21]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	130.0	134.0	148.1	155.8	168.0	181.7	183.2	194.0	200.0	213.0	247.0
  feet	426.5	439.6	485.9	511.1	551.2	596.1	601.0	636.5	656.2	698.8	810.4

  

  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	1327.3	824.9	0.337	0.542	92.37	85.50
  Intermittent Shoreline	50.3	31.3	0.013	0.021	87.59	98.47
  Perennial Streams	1106.2	687.5	0.281	0.452	53.62	56.49
  Intermittent Streams	1199.8	745.7	0.305	0.490	45.67	39.69
  Canals	103.4	64.3	0.026	0.042	77.40	77.86
  1° roads	94.3	58.6	0.024	0.039	74.23	69.47
  2° roads	224.9	139.8	0.057	0.092	88.06	91.60
  3° roads	367.2	228.2	0.093	0.150	70.72	64.89
  4° roads	5629.2	3498.6	1.430	2.301	74.18	81.68
  Total Roads	6315.7	3925.2	1.604	2.581	75.41	81.68
  Railroads	618.7	384.5	0.157	0.253	95.78	94.66
  Pipes and Powerlines	184.6	114.7	0.047	0.075	68.12	87.02

  
  Of the natural water in this HUC, 33.94% (by length) is intermittent [% in USA = 37.42, % in Region = 25.19]

  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