Rivanna -- Cataloging Unit 02080204

• James Accounting Unit 020802
  
• Lower Chesapeake Subregion 0208
  
• Mid-Atlantic Region 02 (There are 95 cataloging units in this region.)
  The state composition by area is 100.0% Virginia.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1994.2 km² ( 770.3 mi² ) [% in USA = 19.75, % in Region = 25.26]
  The area from the USGS is 758 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1725)

  IV. Elevation Analysis

  This analysis is based on 796245 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 224.5 m ( 736.5 ft ) [% in USA = 27.85, % in Region = 53.68]
  The elevation standard deviation is 165.6 m ( 543.3 ft ) [% in USA = 66.60, % in Region = 78.95]
  The coefficient of variation is 73.8 %.
  The vertical relief is 1003.5 m ( 3292.3 ft ) [% in USA = 65.32, % in Region = 76.84]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	61.0	120.4	122.0	143.6	152.0	161.4	183.0	212.9	264.6	439.7	1064.5
  feet	200.1	395.0	400.3	471.1	498.7	529.5	600.4	698.5	868.1	1442.6	3492.4

  

  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	209.7	130.3	0.105	0.169	57.98	26.32
  Intermittent Shoreline	0.4	0.2	0.000	0.000	35.15	66.32
  Perennial Streams	1101.7	684.7	0.552	0.889	87.16	63.16
  Intermittent Streams	397.1	246.8	0.199	0.320	31.64	84.21
  Canals	0.0	0.0	0.000	0.000	35.62	37.89
  1° roads	109.3	67.9	0.055	0.088	91.43	65.26
  2° roads	151.5	94.1	0.076	0.122	95.55	83.16
  3° roads	117.8	73.2	0.059	0.095	54.05	13.68
  4° roads	3355.3	2085.4	1.683	2.707	85.84	60.00
  Total Roads	3733.9	2320.6	1.872	3.013	86.36	58.95
  Railroads	109.1	67.8	0.055	0.088	62.72	33.68
  Pipes and Powerlines	136.5	84.9	0.068	0.110	83.75	80.00

  
  Of the natural water in this HUC, 23.26% (by length) is intermittent [% in USA = 27.76, % in Region = 78.95]

  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