Lower Mississippi-New Orleans -- Cataloging Unit 08090100

• Lower Mississippi Subregion 0809
  
• 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 1705.3 km² ( 658.7 mi² ) [% in USA = 12.36, % in Region = 17.07]
  The area from the USGS is 587 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 2248)

  IV. Elevation Analysis

  This analysis is based on 682913 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 0.7 m ( 2.3 ft ) [% in USA = 0.52, % in Region = 6.10]
  The elevation standard deviation is 1.5 m ( 4.9 ft ) [% in USA = 0.62, % in Region = 6.10]
  The coefficient of variation is 214.3 %.
  The vertical relief is 8.0 m ( 26.2 ft ) [% in USA = 0.47, % in Region = 4.88]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	1.0	3.0	8.0
  feet	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	3.3	9.8	26.2

  

  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	5030.6	3126.5	2.950	4.746	100.00	100.00
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	30.49
  Perennial Streams	58.9	36.6	0.035	0.056	13.41	3.66
  Intermittent Streams	4.5	2.8	0.003	0.004	3.55	3.66
  Canals	626.7	389.5	0.367	0.591	98.91	92.68
  1° roads	45.3	28.1	0.027	0.043	76.98	80.49
  2° roads	45.7	28.4	0.027	0.043	52.30	35.37
  3° roads	307.0	190.8	0.180	0.290	89.77	73.17
  4° roads	2713.3	1686.3	1.591	2.560	82.71	96.34
  Total Roads	3111.3	1933.7	1.824	2.936	85.03	93.90
  Railroads	333.2	207.1	0.195	0.314	97.58	97.56
  Pipes and Powerlines	28.0	17.4	0.016	0.026	33.44	17.07

  
  Of the natural water in this HUC, 0.09% (by length) is intermittent [% in USA = 2.04, % in Region = 3.66]

  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