Coles Creek -- Cataloging Unit 08060204

• Big Black - Homochitto Accounting Unit 080602
  
• Lower Mississippi - Big Black Subregion 0806
  
• Lower Mississippi Region 08 (There are 82 cataloging units in this region.)
  The state composition by area is 98.2% Mississippi, 1.8% Louisiana.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1343.9 km² ( 519.1 mi² ) [% in USA = 7.39, % in Region = 8.54]
  The area from the USGS is 551 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 722)

  IV. Elevation Analysis

  This analysis is based on 536531 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 62.5 m ( 205.1 ft ) [% in USA = 10.23, % in Region = 57.32]
  The elevation standard deviation is 27.6 m ( 90.6 ft ) [% in USA = 19.56, % in Region = 78.05]
  The coefficient of variation is 44.2 %.
  The vertical relief is 145.0 m ( 475.7 ft ) [% in USA = 17.24, % in Region = 78.05]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	7.0	20.7	35.0	46.9	60.0	61.0	72.4	76.0	87.3	96.6	152.0
  feet	23.0	67.9	114.8	153.9	196.8	200.1	237.5	249.3	286.4	316.9	498.7

  

  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	118.2	73.5	0.088	0.142	51.40	31.71
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	30.49
  Perennial Streams	523.3	325.2	0.389	0.627	69.11	65.85
  Intermittent Streams	812.8	505.1	0.605	0.973	80.86	71.95
  Canals	1.7	1.0	0.001	0.002	46.90	19.51
  1° roads	2.2	1.4	0.002	0.003	42.78	28.05
  2° roads	80.9	50.3	0.060	0.097	89.86	90.24
  3° roads	94.7	58.8	0.070	0.113	60.82	10.98
  4° roads	1526.0	948.4	1.135	1.827	47.84	56.10
  Total Roads	1703.8	1058.9	1.268	2.040	48.37	45.12
  Railroads	98.7	61.3	0.073	0.118	75.70	74.39
  Pipes and Powerlines	82.9	51.5	0.062	0.099	80.10	69.51

  
  Of the natural water in this HUC, 55.89% (by length) is intermittent [% in USA = 56.23, % in Region = 70.73]

  VI. Other sites

  • EPA- Surf Your Watershed - Index of Watershed Indicators
  • USGS- Science in Your Watershed - Selected Realtime Streamflow Stations
  • CTIC- Known Your Watershed

  ---

  1999 SEPT 4, Last updated on 2003 JAN 23
  
  D.L. Gustafson, dlg@rapid.msu.montana.edu