Sacramento-Lower Cow-Lower Clear -- Cataloging Unit 18020101

• Lower Sacramento Accounting Unit 180201
  
• Upper Sacramento Subregion 1802
  
• California Region 18 (There are 135 cataloging units in this region.)
  The state composition by area is 100.0% California.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 979.5 km² ( 378.3 mi² ) [% in USA = 4.31, % in Region = 20.74]
  The area from the USGS is 419 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 523)

  IV. Elevation Analysis

  This analysis is based on 391113 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 273.5 m ( 897.3 ft ) [% in USA = 35.43, % in Region = 22.96]
  The elevation standard deviation is 199.7 m ( 655.2 ft ) [% in USA = 71.81, % in Region = 28.15]
  The coefficient of variation is 73.0 %.
  The vertical relief is 1402.0 m ( 4599.7 ft ) [% in USA = 74.89, % in Region = 37.78]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	122.0	127.6	161.4	183.0	183.0	186.2	226.5	254.8	325.0	499.7	1524.0
  feet	400.3	418.6	529.5	600.4	600.4	610.9	743.1	835.9	1066.3	1639.4	4999.9

  

  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	237.4	147.5	0.242	0.390	85.22	93.33
  Intermittent Shoreline	3.1	2.0	0.003	0.005	70.91	68.89
  Perennial Streams	460.9	286.4	0.471	0.757	78.78	75.56
  Intermittent Streams	231.5	143.9	0.236	0.380	36.43	39.26
  Canals	34.1	21.2	0.035	0.056	80.58	71.11
  1° roads	66.6	41.4	0.068	0.109	93.84	85.19
  2° roads	0.0	0.0	0.000	0.000	15.35	73.33
  3° roads	71.2	44.2	0.073	0.117	61.72	77.04
  4° roads	2155.2	1339.5	2.200	3.541	94.84	85.19
  Total Roads	2293.0	1425.1	2.341	3.767	93.65	84.44
  Railroads	78.2	48.6	0.080	0.128	78.83	84.44
  Pipes and Powerlines	114.1	70.9	0.116	0.187	96.92	97.04

  
  Of the natural water in this HUC, 25.15% (by length) is intermittent [% in USA = 29.37, % in Region = 30.37]

  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