Lower Pearl -- Cataloging Unit 03180004

• Pearl Subregion 0318
  
• South Atlantic-Gulf Region 03 (There are 198 cataloging units in this region.)
  The state composition by area is 70.2% Mississippi, 29.8% Louisiana.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 4723.0 km² ( 1824.3 mi² ) [% in USA = 74.28, % in Region = 78.79]
  The area from the USGS is 1810 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1923)

  IV. Elevation Analysis

  This analysis is based on 1885862 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 53.7 m ( 176.2 ft ) [% in USA = 8.86, % in Region = 43.43]
  The elevation standard deviation is 34.1 m ( 111.9 ft ) [% in USA = 25.96, % in Region = 70.20]
  The coefficient of variation is 63.5 %.
  The vertical relief is 155.2 m ( 509.2 ft ) [% in USA = 19.52, % in Region = 56.06]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	8.0	18.0	31.3	43.0	48.5	61.0	76.0	90.7	104.9	155.2
  feet	0.0	26.2	59.1	102.7	141.1	159.1	200.1	249.3	297.6	344.2	509.2

  

  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	1767.2	1098.3	0.374	0.602	93.32	84.34
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	29.80
  Perennial Streams	2027.5	1260.1	0.429	0.691	74.32	52.02
  Intermittent Streams	2641.8	1641.9	0.559	0.900	76.17	89.90
  Canals	0.1	0.1	0.000	0.000	36.10	41.92
  1° roads	123.8	77.0	0.026	0.042	76.46	65.66
  2° roads	118.2	73.4	0.025	0.040	49.27	11.11
  3° roads	597.6	371.4	0.127	0.204	80.06	64.65
  4° roads	6969.1	4331.3	1.476	2.374	77.17	59.09
  Total Roads	7808.7	4853.1	1.653	2.660	77.88	57.07
  Railroads	273.7	170.1	0.058	0.093	65.09	48.48
  Pipes and Powerlines	446.9	277.8	0.095	0.152	93.04	81.82

  
  Of the natural water in this HUC, 41.04% (by length) is intermittent [% in USA = 43.82, % in Region = 79.80]

  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