Upper Ouachita -- Cataloging Unit 08040102

• Upper Ouachita Accounting Unit 080401
  
• Lower Red - Ouachita Subregion 0804
  
• Lower Mississippi Region 08 (There are 82 cataloging units in this region.)
  The state composition by area is 100.0% Arkansas.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 4574.8 km² ( 1767.1 mi² ) [% in USA = 72.57, % in Region = 79.27]
  The area from the USGS is 1750 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1304)

  IV. Elevation Analysis

  This analysis is based on 1827447 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 123.2 m ( 404.2 ft ) [% in USA = 17.24, % in Region = 90.24]
  The elevation standard deviation is 82.6 m ( 271.0 ft ) [% in USA = 51.26, % in Region = 98.78]
  The coefficient of variation is 67.0 %.
  The vertical relief is 630.6 m ( 2068.9 ft ) [% in USA = 58.74, % in Region = 97.56]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	27.0	45.0	60.0	73.9	84.5	91.3	119.9	146.3	182.0	243.0	657.6
  feet	88.6	147.6	196.8	242.5	277.2	299.5	393.4	480.0	597.1	797.2	2157.5

  

  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	779.0	484.1	0.170	0.274	75.94	54.88
  Intermittent Shoreline	3.5	2.2	0.001	0.001	50.36	53.66
  Perennial Streams	1311.5	815.1	0.287	0.461	54.57	46.34
  Intermittent Streams	3915.1	2433.2	0.856	1.377	95.45	96.34
  Canals	0.0	0.0	0.000	0.000	35.62	9.76
  1° roads	66.2	41.1	0.014	0.023	61.91	57.32
  2° roads	131.8	81.9	0.029	0.046	54.90	39.02
  3° roads	611.8	380.3	0.134	0.215	82.09	46.34
  4° roads	4793.5	2979.2	1.048	1.686	40.36	46.34
  Total Roads	5603.4	3482.6	1.225	1.971	44.95	39.02
  Railroads	233.9	145.4	0.051	0.082	59.83	48.78
  Pipes and Powerlines	247.2	153.6	0.054	0.087	74.18	58.54

  
  Of the natural water in this HUC, 65.21% (by length) is intermittent [% in USA = 65.80, % in Region = 89.02]

  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