Big -- Cataloging Unit 08020304

• Lower White Accounting Unit 080203
  
• 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.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 2362.4 km² ( 912.5 mi² ) [% in USA = 29.80, % in Region = 35.37]
  The area from the USGS is 943 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 553)

  IV. Elevation Analysis

  This analysis is based on 943338 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 57.0 m ( 187.0 ft ) [% in USA = 9.38, % in Region = 47.56]
  The elevation standard deviation is 6.4 m ( 21.0 ft ) [% in USA = 2.84, % in Region = 20.73]
  The coefficient of variation is 11.2 %.
  The vertical relief is 75.3 m ( 247.0 ft ) [% in USA = 5.97, % in Region = 28.05]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	41.3	50.0	53.0	54.0	54.0	56.0	58.1	60.0	61.0	64.0	116.6
  feet	135.5	164.0	173.9	177.2	177.2	183.7	190.6	196.8	200.1	210.0	382.5

  

  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	152.0	94.5	0.064	0.104	41.73	23.17
  Intermittent Shoreline	24.3	15.1	0.010	0.017	85.55	86.59
  Perennial Streams	601.8	374.0	0.255	0.410	49.12	35.37
  Intermittent Streams	1658.1	1030.5	0.702	1.129	87.73	80.49
  Canals	122.8	76.3	0.052	0.084	85.69	53.66
  1° roads	21.0	13.0	0.009	0.014	53.48	42.68
  2° roads	149.7	93.1	0.063	0.102	91.38	93.90
  3° roads	406.6	252.7	0.172	0.277	88.68	69.51
  4° roads	2481.6	1542.3	1.050	1.690	40.64	47.56
  Total Roads	3058.9	1901.1	1.295	2.083	50.69	48.78
  Railroads	128.2	79.7	0.054	0.087	62.43	51.22
  Pipes and Powerlines	259.1	161.1	0.110	0.176	95.97	95.12

  
  Of the natural water in this HUC, 69.06% (by length) is intermittent [% in USA = 69.07, % in Region = 95.12]

  VI. Other sites

  • EPA- Surf Your Watershed - Index of Watershed Indicators
  • USGS- Science in Your Watershed - Selected Realtime Streamflow Stations
  • CTIC- Known Your Watershed

  ---

  1999 SEPT 4, Last updated on 2003 JAN 23
  
  D.L. Gustafson, dlg@rapid.msu.montana.edu