Robert S -- Cataloging Unit 11110104

• Robert S Accounting Unit 111101
  
• Lower Arkansas Subregion 1111
  
• Arkansas-White-Red Region 11 (There are 173 cataloging units in this region.)
  The state composition by area is 80.8% Oklahoma, 19.2% Arkansas.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 4639.7 km² ( 1792.2 mi² ) [% in USA = 73.24, % in Region = 71.68]
  The area from the USGS is 1780 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1312)

  IV. Elevation Analysis

  This analysis is based on 1853863 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 235.6 m ( 773.0 ft ) [% in USA = 29.28, % in Region = 22.54]
  The elevation standard deviation is 97.3 m ( 319.2 ft ) [% in USA = 54.81, % in Region = 71.68]
  The coefficient of variation is 41.3 %.
  The vertical relief is 519.0 m ( 1702.7 ft ) [% in USA = 54.19, % in Region = 72.25]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	121.0	152.0	152.0	162.0	182.0	200.8	234.3	273.0	313.5	380.0	640.0
  feet	397.0	498.7	498.7	531.5	597.1	658.8	768.7	895.7	1028.5	1246.7	2099.7

  

  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	1068.7	664.2	0.230	0.371	84.27	90.75
  Intermittent Shoreline	0.7	0.4	0.000	0.000	33.30	16.18
  Perennial Streams	1091.1	678.1	0.235	0.378	46.09	73.41
  Intermittent Streams	2843.0	1766.9	0.613	0.986	81.53	71.68
  Canals	0.0	0.0	0.000	0.000	35.62	56.65
  1° roads	143.0	88.9	0.031	0.050	80.39	89.02
  2° roads	162.0	100.7	0.035	0.056	64.52	56.07
  3° roads	405.9	252.3	0.087	0.141	68.40	73.99
  4° roads	4908.3	3050.5	1.058	1.702	41.26	38.15
  Total Roads	5619.2	3492.4	1.211	1.949	43.91	42.20
  Railroads	267.4	166.2	0.058	0.093	64.80	67.05
  Pipes and Powerlines	306.9	190.7	0.066	0.106	82.38	81.50

  
  Of the natural water in this HUC, 56.84% (by length) is intermittent [% in USA = 57.37, % in Region = 26.59]

  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