Lower Black -- Cataloging Unit 11010009

• Upper White Subregion 1101
  
• Arkansas-White-Red Region 11 (There are 173 cataloging units in this region.)
  The state composition by area is 84.6% Arkansas, 15.4% Missouri.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 2034.0 km² ( 785.7 mi² ) [% in USA = 20.99, % in Region = 13.29]
  The area from the USGS is 760 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 898)

  IV. Elevation Analysis

  This analysis is based on 812856 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 114.6 m ( 376.0 ft ) [% in USA = 16.49, % in Region = 9.83]
  The elevation standard deviation is 42.0 m ( 137.8 ft ) [% in USA = 33.40, % in Region = 29.48]
  The coefficient of variation is 36.6 %.
  The vertical relief is 212.0 m ( 695.5 ft ) [% in USA = 30.36, % in Region = 27.17]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	62.0	72.0	75.0	79.0	90.5	106.0	121.0	135.9	152.0	181.4	274.0
  feet	203.4	236.2	246.1	259.2	296.9	347.8	397.0	445.9	498.7	595.1	898.9

  

  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	533.1	331.3	0.262	0.422	87.40	93.64
  Intermittent Shoreline	3.6	2.2	0.002	0.003	61.68	46.82
  Perennial Streams	545.8	339.2	0.268	0.432	51.87	80.92
  Intermittent Streams	1482.1	921.1	0.729	1.172	89.01	86.13
  Canals	58.8	36.6	0.029	0.047	78.26	90.75
  1° roads	0.0	0.0	0.000	0.000	30.84	24.86
  2° roads	70.7	44.0	0.035	0.056	64.28	54.91
  3° roads	325.7	202.4	0.160	0.258	86.93	88.44
  4° roads	1984.8	1233.5	0.976	1.570	34.63	27.75
  Total Roads	2381.2	1479.9	1.171	1.884	40.79	35.84
  Railroads	35.8	22.2	0.018	0.028	27.33	16.18
  Pipes and Powerlines	90.8	56.4	0.045	0.072	65.80	64.16

  
  Of the natural water in this HUC, 57.93% (by length) is intermittent [% in USA = 58.60, % in Region = 30.64]

  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