Black -- Cataloging Unit 08040305

• Lower Red Accounting Unit 080403
  
• 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 281.2 km² ( 108.6 mi² ) [% in USA = 0.33, % in Region = 2.44]
  The area from the USGS is 84 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 227)

  IV. Elevation Analysis

  This analysis is based on 112387 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 13.0 m ( 42.7 ft ) [% in USA = 3.46, % in Region = 15.85]
  The elevation standard deviation is 2.9 m ( 9.5 ft ) [% in USA = 1.28, % in Region = 13.41]
  The coefficient of variation is 22.3 %.
  The vertical relief is 14.0 m ( 45.9 ft ) [% in USA = 0.81, % in Region = 8.54]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	4.0	8.0	11.9	13.0	13.0	14.0	14.0	15.0	15.0	15.1	18.0
  feet	13.1	26.2	39.0	42.7	42.7	45.9	45.9	49.2	49.2	49.5	59.1

  

  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	291.7	181.3	1.037	1.669	99.19	95.12
  Intermittent Shoreline	0.8	0.5	0.003	0.004	68.69	69.51
  Perennial Streams	22.3	13.8	0.079	0.127	21.98	7.32
  Intermittent Streams	85.0	52.8	0.302	0.486	45.43	41.46
  Canals	30.6	19.0	0.109	0.175	92.99	64.63
  1° roads	0.0	0.0	0.000	0.000	30.84	7.32
  2° roads	1.0	0.6	0.003	0.006	19.56	3.66
  3° roads	87.6	54.4	0.311	0.501	98.77	97.56
  4° roads	250.2	155.5	0.889	1.431	28.71	21.95
  Total Roads	338.7	210.5	1.204	1.938	43.01	36.59
  Railroads	0.3	0.2	0.001	0.002	14.16	1.22
  Pipes and Powerlines	1.4	0.9	0.005	0.008	17.24	4.88

  
  Of the natural water in this HUC, 21.45% (by length) is intermittent [% in USA = 25.96, % in Region = 26.83]

  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