Lower Arkansas -- Cataloging Unit 08020401

• Lower Arkansas Accounting Unit 080204
  
• Lower Mississippi - St. Francis Subregion 0802
  
• Lower Mississippi Region 08 (There are 82 cataloging units in this region.)
  The state composition by area is 100.0% Arkansas, 0.0% Mississippi.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1875.8 km² ( 724.6 mi² ) [% in USA = 16.06, % in Region = 23.17]
  The area from the USGS is 700 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 639)

  IV. Elevation Analysis

  This analysis is based on 749327 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 56.3 m ( 184.7 ft ) [% in USA = 9.24, % in Region = 46.34]
  The elevation standard deviation is 8.2 m ( 26.9 ft ) [% in USA = 3.88, % in Region = 26.83]
  The coefficient of variation is 14.6 %.
  The vertical relief is 56.0 m ( 183.7 ft ) [% in USA = 4.41, % in Region = 23.17]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	35.0	45.0	48.6	53.0	54.0	57.0	58.0	60.8	64.0	67.7	91.0
  feet	114.8	147.6	159.4	173.9	177.2	187.0	190.3	199.5	210.0	222.1	298.6

  

  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	983.0	611.0	0.524	0.843	96.45	81.71
  Intermittent Shoreline	97.9	60.9	0.052	0.084	97.02	97.56
  Perennial Streams	288.4	179.3	0.154	0.247	32.83	13.41
  Intermittent Streams	598.4	371.9	0.319	0.513	48.08	45.12
  Canals	649.0	403.4	0.346	0.557	98.72	90.24
  1° roads	0.0	0.0	0.000	0.000	30.84	7.32
  2° roads	64.9	40.4	0.035	0.056	63.90	51.22
  3° roads	155.0	96.3	0.083	0.133	66.27	15.85
  4° roads	1898.9	1180.1	1.012	1.629	37.19	40.24
  Total Roads	2118.8	1316.8	1.130	1.817	38.04	26.83
  Railroads	56.7	35.3	0.030	0.049	40.08	19.51
  Pipes and Powerlines	51.8	32.2	0.028	0.044	48.03	24.39

  
  Of the natural water in this HUC, 35.39% (by length) is intermittent [% in USA = 38.61, % in Region = 43.90]

  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