Big Sandy -- Cataloging Unit 15030201

• Bill Williams Accounting Unit 150302
  
• Lower Colorado Subregion 1503
  
• Lower Colorado Region 15 (There are 85 cataloging units in this region.)
  The state composition by area is 100.0% Arizona.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 5574.9 km² ( 2153.4 mi² ) [% in USA = 83.51, % in Region = 69.41]
  The area from the USGS is 2120 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 729)

  IV. Elevation Analysis

  This analysis is based on 2226399 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 1305.0 m ( 4281.4 ft ) [% in USA = 79.01, % in Region = 44.71]
  The elevation standard deviation is 390.6 m ( 1281.5 ft ) [% in USA = 90.81, % in Region = 84.71]
  The coefficient of variation is 29.9 %.
  The vertical relief is 2128.3 m ( 6982.5 ft ) [% in USA = 90.29, % in Region = 78.82]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	365.0	730.8	907.2	1075.5	1219.0	1356.1	1523.2	1635.7	1669.8	1759.5	2493.3
  feet	1197.5	2397.6	2976.3	3528.5	3999.3	4449.1	4997.3	5366.4	5478.3	5772.6	8180.0

  

  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	12.9	8.0	0.002	0.004	5.21	37.65
  Intermittent Shoreline	2.0	1.2	0.000	0.001	40.60	27.06
  Perennial Streams	94.1	58.5	0.017	0.027	8.81	56.47
  Intermittent Streams	3766.7	2341.0	0.676	1.087	86.36	41.18
  Canals	2.7	1.7	0.000	0.001	41.50	40.00
  1° roads	105.2	65.4	0.019	0.030	68.21	82.35
  2° roads	67.7	42.1	0.012	0.020	30.22	56.47
  3° roads	0.0	0.0	0.000	0.000	4.07	9.41
  4° roads	2890.1	1796.2	0.518	0.834	8.10	28.24
  Total Roads	3062.9	1903.6	0.549	0.884	7.91	28.24
  Railroads	0.0	0.0	0.000	0.000	12.60	34.12
  Pipes and Powerlines	215.0	133.6	0.039	0.062	60.11	81.18

  
  Of the natural water in this HUC, 97.24% (by length) is intermittent [% in USA = 94.98, % in Region = 51.76]

  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