Suisun Bay -- Cataloging Unit 18050001

• San Francisco Bay Subregion 1805
  
• 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 1691.1 km² ( 653.2 mi² ) [% in USA = 12.03, % in Region = 36.30]
  The area from the USGS is 644 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1127)

  IV. Elevation Analysis

  This analysis is based on 676012 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 103.6 m ( 339.9 ft ) [% in USA = 15.25, % in Region = 10.37]
  The elevation standard deviation is 137.7 m ( 451.8 ft ) [% in USA = 62.62, % in Region = 12.59]
  The coefficient of variation is 132.9 %.
  The vertical relief is 1121.9 m ( 3680.7 ft ) [% in USA = 68.55, % in Region = 22.22]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	0.0	0.0	7.9	24.3	53.5	75.8	123.0	183.0	273.4	1121.9
  feet	0.0	0.0	0.0	25.9	79.7	175.5	248.7	403.5	600.4	897.0	3680.7

  

  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	700.6	435.4	0.414	0.667	94.46	97.04
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	33.33
  Perennial Streams	604.3	375.6	0.357	0.575	65.09	65.19
  Intermittent Streams	33.9	21.1	0.020	0.032	9.00	12.59
  Canals	172.9	107.5	0.102	0.164	92.56	88.89
  1° roads	203.0	126.2	0.120	0.193	97.63	92.59
  2° roads	0.0	0.0	0.000	0.000	15.35	73.33
  3° roads	36.9	23.0	0.022	0.035	23.31	27.41
  4° roads	4117.6	2559.1	2.435	3.918	95.83	88.89
  Total Roads	4357.6	2708.3	2.577	4.146	95.22	88.15
  Railroads	245.1	152.3	0.145	0.233	94.84	95.56
  Pipes and Powerlines	50.8	31.6	0.030	0.048	51.21	68.15

  
  Of the natural water in this HUC, 2.53% (by length) is intermittent [% in USA = 7.91, % in Region = 8.89]

  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