Eastern Louisiana Coastal -- Cataloging Unit 08090203

• Lake Pontchartrain Accounting Unit 080902
  
• 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 2896.9 km² ( 1119.0 mi² ) [% in USA = 44.86, % in Region = 52.44]
  The area from the USGS is 2160 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1681)

  IV. Elevation Analysis

  This analysis is based on 1157230 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 0.2 m ( 0.7 ft ) [% in USA = 0.33, % in Region = 3.66]
  The elevation standard deviation is 0.4 m ( 1.3 ft ) [% in USA = 0.33, % in Region = 2.44]
  The coefficient of variation is 200.0 %.
  The vertical relief is 6.9 m ( 22.6 ft ) [% in USA = 0.28, % in Region = 2.44]

  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	0.0	1.0	6.9
  feet	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	3.3	22.6

  

  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	8268.3	5138.8	2.854	4.592	99.95	98.78
  Intermittent Shoreline	0.2	0.1	0.000	0.000	29.89	35.37
  Perennial Streams	1002.1	622.8	0.346	0.557	63.95	56.10
  Intermittent Streams	2.5	1.6	0.001	0.001	2.94	2.44
  Canals	524.2	325.8	0.181	0.291	96.59	75.61
  1° roads	134.8	83.8	0.047	0.075	88.25	92.68
  2° roads	75.7	47.1	0.026	0.042	51.16	32.93
  3° roads	98.5	61.2	0.034	0.055	34.53	3.66
  4° roads	2324.6	1444.8	0.802	1.291	22.12	15.85
  Total Roads	2633.6	1636.8	0.909	1.463	25.15	13.41
  Railroads	161.4	100.3	0.056	0.090	63.43	53.66
  Pipes and Powerlines	34.9	21.7	0.012	0.019	27.29	10.98

  
  Of the natural water in this HUC, 0.03% (by length) is intermittent [% in USA = 1.52, % in Region = 2.44]

  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