Santa Ana -- Cataloging Unit 18070203

• Santa Ana Accounting Unit 180702
  
• Southern California Coastal Subregion 1807
  
• 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 4325.1 km² ( 1670.7 mi² ) [% in USA = 69.78, % in Region = 85.93]
  The area from the USGS is 1680 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 2417)

  IV. Elevation Analysis

  This analysis is based on 1727891 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 827.5 m ( 2714.9 ft ) [% in USA = 67.79, % in Region = 57.04]
  The elevation standard deviation is 709.2 m ( 2326.7 ft ) [% in USA = 99.57, % in Region = 93.33]
  The coefficient of variation is 85.7 %.
  The vertical relief is 3413.0 m ( 11197.4 ft ) [% in USA = 99.19, % in Region = 91.85]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	221.2	284.0	352.3	425.3	507.9	679.1	973.1	1392.9	2086.2	3413.0
  feet	0.0	725.7	931.7	1155.8	1395.3	1666.3	2228.0	3192.5	4569.8	6844.4	11197.4

  

  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	474.6	294.9	0.110	0.177	59.21	63.70
  Intermittent Shoreline	142.5	88.6	0.033	0.053	95.03	96.30
  Perennial Streams	1334.6	829.4	0.309	0.496	58.36	60.00
  Intermittent Streams	657.6	408.7	0.152	0.245	25.77	28.89
  Canals	109.8	68.2	0.025	0.041	76.93	65.93
  1° roads	614.7	382.0	0.142	0.229	98.20	94.81
  2° roads	0.0	0.0	0.000	0.000	15.35	73.33
  3° roads	379.1	235.6	0.088	0.141	68.55	89.63
  4° roads	14204.7	8828.3	3.284	5.284	98.06	94.07
  Total Roads	15198.4	9445.9	3.514	5.654	97.92	94.07
  Railroads	621.2	386.1	0.144	0.231	94.69	94.81
  Pipes and Powerlines	47.9	29.8	0.011	0.018	25.96	37.04

  
  Of the natural water in this HUC, 30.66% (by length) is intermittent [% in USA = 34.58, % in Region = 35.56]

  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