Cumberland-St. Simons -- Cataloging Unit 03070203

• St. Marys - Satilla Accounting Unit 030702
  
• Altamaha - St. Marys Subregion 0307
  
• South Atlantic-Gulf Region 03 (There are 198 cataloging units in this region.)
  The state composition by area is 99.9% Georgia, 0.1% Florida.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 709.1 km² ( 273.9 mi² ) [% in USA = 2.56, % in Region = 2.02]
  The area from the USGS is 768 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 321)

  IV. Elevation Analysis

  This analysis is based on 283196 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 2.8 m ( 9.2 ft ) [% in USA = 0.99, % in Region = 3.54]
  The elevation standard deviation is 2.3 m ( 7.5 ft ) [% in USA = 0.85, % in Region = 3.03]
  The coefficient of variation is 82.1 %.
  The vertical relief is 12.0 m ( 39.4 ft ) [% in USA = 0.76, % in Region = 3.54]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	0.0	0.0	0.0	2.0	3.0	3.6	5.0	5.0	6.0	12.0
  feet	0.0	0.0	0.0	0.0	6.6	9.8	11.8	16.4	16.4	19.7	39.4

  

  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	830.3	516.0	1.171	1.884	99.48	98.48
  Intermittent Shoreline	132.7	82.5	0.187	0.301	99.57	100.00
  Perennial Streams	148.6	92.4	0.210	0.337	41.35	11.11
  Intermittent Streams	55.7	34.6	0.079	0.126	16.63	24.24
  Canals	0.0	0.0	0.000	0.000	35.62	41.41
  1° roads	17.3	10.7	0.024	0.039	74.66	61.62
  2° roads	17.8	11.0	0.025	0.040	49.41	11.62
  3° roads	40.5	25.2	0.057	0.092	52.68	10.10
  4° roads	863.2	536.5	1.217	1.959	55.47	24.75
  Total Roads	938.8	583.4	1.324	2.130	53.53	19.70
  Railroads	20.9	13.0	0.029	0.047	39.18	10.61
  Pipes and Powerlines	18.6	11.6	0.026	0.042	46.42	16.16

  
  Of the natural water in this HUC, 16.14% (by length) is intermittent [% in USA = 20.99, % in Region = 32.83]

  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