Ouachita Headwaters -- Cataloging Unit 08040101

• 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 4032.9 km² ( 1557.8 mi² ) [% in USA = 65.04, % in Region = 73.17]
  The area from the USGS is 1550 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1344)

  IV. Elevation Analysis

  This analysis is based on 1611798 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 262.9 m ( 862.5 ft ) [% in USA = 34.01, % in Region = 100.00]
  The elevation standard deviation is 95.2 m ( 312.3 ft ) [% in USA = 54.48, % in Region = 100.00]
  The coefficient of variation is 36.2 %.
  The vertical relief is 732.7 m ( 2403.8 ft ) [% in USA = 60.78, % in Region = 100.00]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	88.0	156.9	182.0	207.9	220.0	243.0	274.0	302.7	332.8	389.8	820.7
  feet	288.7	514.8	597.1	682.1	721.8	797.2	898.9	993.1	1091.9	1278.9	2692.6

  

  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	1400.1	870.1	0.347	0.559	92.56	75.61
  Intermittent Shoreline	0.3	0.2	0.000	0.000	30.27	36.59
  Perennial Streams	1545.5	960.6	0.383	0.617	68.40	63.41
  Intermittent Streams	1741.4	1082.3	0.432	0.695	61.96	51.22
  Canals	0.0	0.0	0.000	0.000	35.62	9.76
  1° roads	3.9	2.4	0.001	0.002	41.07	23.17
  2° roads	191.4	118.9	0.047	0.076	80.01	75.61
  3° roads	417.0	259.1	0.103	0.166	74.04	30.49
  4° roads	5115.7	3179.4	1.268	2.041	61.11	71.95
  Total Roads	5727.9	3559.9	1.420	2.285	63.10	68.29
  Railroads	80.8	50.2	0.020	0.032	30.18	9.76
  Pipes and Powerlines	109.8	68.2	0.027	0.044	47.51	23.17

  
  Of the natural water in this HUC, 37.16% (by length) is intermittent [% in USA = 40.22, % in Region = 46.34]

  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