Lower Ouachita-Smackover -- Cataloging Unit 08040201

• 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% Arkansas.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 4652.8 km² ( 1797.2 mi² ) [% in USA = 73.38, % in Region = 82.93]
  The area from the USGS is 1810 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1342)

  IV. Elevation Analysis

  This analysis is based on 1858300 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 60.8 m ( 199.5 ft ) [% in USA = 9.95, % in Region = 52.44]
  The elevation standard deviation is 21.6 m ( 70.9 ft ) [% in USA = 12.93, % in Region = 64.63]
  The coefficient of variation is 35.5 %.
  The vertical relief is 115.2 m ( 377.9 ft ) [% in USA = 11.13, % in Region = 56.10]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	21.0	32.6	41.9	45.6	54.0	60.0	64.2	73.6	77.4	91.0	136.2
  feet	68.9	107.0	137.5	149.6	177.2	196.8	210.6	241.5	253.9	298.6	446.8

  

  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	451.3	280.5	0.097	0.156	55.00	34.15
  Intermittent Shoreline	24.5	15.2	0.005	0.008	77.45	78.05
  Perennial Streams	1569.8	975.7	0.337	0.543	62.67	53.66
  Intermittent Streams	3707.1	2304.0	0.797	1.282	93.56	91.46
  Canals	9.7	6.0	0.002	0.003	50.83	23.17
  1° roads	7.9	4.9	0.002	0.003	42.92	29.27
  2° roads	188.0	116.8	0.040	0.065	71.62	65.85
  3° roads	602.1	374.2	0.129	0.208	80.86	42.68
  4° roads	5909.8	3673.0	1.270	2.044	61.25	74.39
  Total Roads	6707.8	4168.9	1.442	2.320	64.95	69.51
  Railroads	434.5	270.0	0.093	0.150	85.13	89.02
  Pipes and Powerlines	303.9	188.9	0.065	0.105	81.67	73.17

  
  Of the natural water in this HUC, 64.87% (by length) is intermittent [% in USA = 65.56, % in Region = 87.80]

  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