Mckinney-Posten Bayous -- Cataloging Unit 11140201

• Red-Saline Accounting Unit 111402
  
• Red-Sulphur Subregion 1114
  
• Arkansas-White-Red Region 11 (There are 173 cataloging units in this region.)
  The state composition by area is 86.2% Arkansas, 11.4% Louisiana, 2.3% Texas.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 2423.6 km² ( 936.1 mi² ) [% in USA = 31.26, % in Region = 23.70]
  The area from the USGS is 906 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 638)

  IV. Elevation Analysis

  This analysis is based on 969378 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 79.7 m ( 261.5 ft ) [% in USA = 12.32, % in Region = 5.20]
  The elevation standard deviation is 18.7 m ( 61.4 ft ) [% in USA = 9.71, % in Region = 3.47]
  The coefficient of variation is 23.5 %.
  The vertical relief is 105.0 m ( 344.5 ft ) [% in USA = 9.47, % in Region = 5.20]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	47.0	60.0	64.0	68.0	73.0	75.8	78.7	86.2	92.8	106.1	152.0
  feet	154.2	196.8	210.0	223.1	239.5	248.7	258.2	282.8	304.5	348.1	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	945.0	587.3	0.390	0.627	93.89	99.42
  Intermittent Shoreline	7.8	4.8	0.003	0.005	71.01	57.80
  Perennial Streams	622.2	386.7	0.257	0.413	49.36	75.14
  Intermittent Streams	923.0	573.6	0.381	0.613	55.71	37.57
  Canals	429.4	266.9	0.177	0.285	96.49	100.00
  1° roads	51.1	31.8	0.021	0.034	71.01	79.19
  2° roads	104.4	64.9	0.043	0.069	75.04	72.83
  3° roads	282.0	175.3	0.116	0.187	77.45	81.50
  4° roads	2311.3	1436.5	0.954	1.534	32.73	24.86
  Total Roads	2748.8	1708.4	1.134	1.825	38.47	32.37
  Railroads	150.9	93.8	0.062	0.100	68.97	70.52
  Pipes and Powerlines	48.3	30.0	0.020	0.032	38.23	33.53

  
  Of the natural water in this HUC, 37.26% (by length) is intermittent [% in USA = 40.31, % in Region = 9.83]

  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