San Diego -- Cataloging Unit 18070304

• Laguna-San Diego Coastal Accounting Unit 180703
  
• 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 3588.9 km² ( 1386.3 mi² ) [% in USA = 58.08, % in Region = 74.81]
  The area from the USGS is 1390 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1798)

  IV. Elevation Analysis

  This analysis is based on 1433205 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 468.5 m ( 1537.1 ft ) [% in USA = 54.86, % in Region = 36.30]
  The elevation standard deviation is 398.4 m ( 1307.1 ft ) [% in USA = 91.24, % in Region = 62.22]
  The coefficient of variation is 85.0 %.
  The vertical relief is 1977.9 m ( 6489.1 ft ) [% in USA = 87.21, % in Region = 54.07]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	62.3	121.9	178.2	241.7	360.4	480.9	606.6	796.6	1093.9	1977.9
  feet	0.0	204.4	399.9	584.6	793.0	1182.4	1577.7	1990.1	2613.5	3588.9	6489.1

  

  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	588.1	365.5	0.164	0.264	74.80	85.93
  Intermittent Shoreline	6.2	3.9	0.002	0.003	61.30	60.00
  Perennial Streams	1021.9	635.1	0.285	0.458	54.24	54.07
  Intermittent Streams	71.6	44.5	0.020	0.032	8.95	11.85
  Canals	11.0	6.8	0.003	0.005	54.19	37.04
  1° roads	489.0	303.9	0.136	0.219	98.01	93.33
  2° roads	0.0	0.0	0.000	0.000	15.35	73.33
  3° roads	248.3	154.3	0.069	0.111	60.21	74.81
  4° roads	10055.7	6249.6	2.802	4.508	96.92	91.85
  Total Roads	10793.0	6707.9	3.007	4.839	96.68	91.85
  Railroads	146.2	90.9	0.041	0.066	50.26	65.93
  Pipes and Powerlines	78.2	48.6	0.022	0.035	40.50	54.07

  
  Of the natural water in this HUC, 4.61% (by length) is intermittent [% in USA = 10.37, % in Region = 11.11]

  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