Lower Ouachita -- Cataloging Unit 08040207

• Lower Ouachita Accounting Unit 080402
  
• 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% Louisiana.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1992.1 km² ( 769.5 mi² ) [% in USA = 19.61, % in Region = 26.83]
  The area from the USGS is 759 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1107)

  IV. Elevation Analysis

  This analysis is based on 796483 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 31.9 m ( 104.7 ft ) [% in USA = 6.49, % in Region = 30.49]
  The elevation standard deviation is 17.8 m ( 58.4 ft ) [% in USA = 8.91, % in Region = 47.56]
  The coefficient of variation is 55.8 %.
  The vertical relief is 86.4 m ( 283.5 ft ) [% in USA = 7.30, % in Region = 37.80]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	4.0	14.7	15.0	17.3	21.9	25.5	31.0	44.2	47.7	60.0	90.4
  feet	13.1	48.2	49.2	56.8	71.8	83.7	101.7	145.0	156.5	196.8	296.6

  

  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	1079.9	671.2	0.542	0.872	96.68	82.93
  Intermittent Shoreline	4.2	2.6	0.002	0.003	64.71	62.20
  Perennial Streams	494.0	307.0	0.248	0.399	47.99	30.49
  Intermittent Streams	596.8	370.9	0.300	0.482	44.77	40.24
  Canals	25.8	16.1	0.013	0.021	69.07	39.02
  1° roads	41.2	25.6	0.021	0.033	70.54	69.51
  2° roads	96.9	60.2	0.049	0.078	81.48	76.83
  3° roads	341.4	212.2	0.171	0.276	88.58	68.29
  4° roads	2648.4	1646.0	1.329	2.139	66.79	84.15
  Total Roads	3127.8	1944.0	1.570	2.526	73.47	82.93
  Railroads	157.6	97.9	0.079	0.127	78.49	80.49
  Pipes and Powerlines	116.9	72.7	0.059	0.094	77.78	62.20

  
  Of the natural water in this HUC, 27.64% (by length) is intermittent [% in USA = 31.69, % in Region = 32.93]

  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