Trinity -- Cataloging Unit 18010211

• Klamath Accounting Unit 180102
  
• Klamath-Northern California Coastal Subregion 1801
  
• 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 5291.9 km² ( 2044.1 mi² ) [% in USA = 81.05, % in Region = 88.89]
  The area from the USGS is 2010 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 2294)

  IV. Elevation Analysis

  This analysis is based on 2113543 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 1159.7 m ( 3804.7 ft ) [% in USA = 75.75, % in Region = 71.85]
  The elevation standard deviation is 473.1 m ( 1552.1 ft ) [% in USA = 95.64, % in Region = 76.30]
  The coefficient of variation is 40.8 %.
  The vertical relief is 2661.0 m ( 8730.2 ft ) [% in USA = 97.02, % in Region = 79.26]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	61.0	609.0	751.0	867.9	971.4	1093.6	1222.1	1392.7	1595.2	1845.0	2722.0
  feet	200.1	1998.0	2463.9	2847.4	3187.0	3587.9	4009.5	4569.2	5233.5	6053.1	8930.3

  

  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	369.6	229.7	0.070	0.112	44.48	45.93
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	33.33
  Perennial Streams	2938.5	1826.3	0.555	0.893	87.64	90.37
  Intermittent Streams	704.7	438.0	0.133	0.214	23.54	25.19
  Canals	0.0	0.0	0.000	0.000	35.62	25.19
  1° roads	0.0	0.0	0.000	0.000	30.84	40.00
  2° roads	0.0	0.0	0.000	0.000	15.35	73.33
  3° roads	278.0	172.8	0.053	0.085	48.79	57.04
  4° roads	4196.7	2608.3	0.793	1.276	21.93	18.52
  Total Roads	4474.7	2781.0	0.846	1.361	21.65	18.52
  Railroads	0.0	0.0	0.000	0.000	12.60	30.37
  Pipes and Powerlines	59.3	36.9	0.011	0.018	26.20	37.78

  
  Of the natural water in this HUC, 17.56% (by length) is intermittent [% in USA = 22.22, % in Region = 25.19]

  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