Black Hills-Fresno -- Cataloging Unit 13040203

• Rio Grande-Amistad Accounting Unit 130402
  
• Rio Grande-Amistad Subregion 1304
  
• Rio Grande Region 13 (There are 70 cataloging units in this region.)
  The state composition by area is 100.0% Texas.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1632.8 km² ( 630.7 mi² ) [% in USA = 10.94, % in Region = 5.71]
  The area from the USGS is 617 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 158)

  IV. Elevation Analysis

  This analysis is based on 652022 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 1116.9 m ( 3664.3 ft ) [% in USA = 74.75, % in Region = 32.86]
  The elevation standard deviation is 200.6 m ( 658.1 ft ) [% in USA = 71.86, % in Region = 42.86]
  The coefficient of variation is 18.0 %.
  The vertical relief is 911.9 m ( 2991.8 ft ) [% in USA = 63.76, % in Region = 28.57]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	663.2	819.8	902.6	1003.9	1067.0	1144.5	1216.8	1273.9	1311.0	1360.2	1575.1
  feet	2175.8	2689.6	2961.2	3293.6	3500.6	3754.9	3992.1	4179.4	4301.1	4462.5	5167.6

  

  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	0.9	0.6	0.001	0.001	2.37	21.43
  Intermittent Shoreline	1.1	0.7	0.001	0.001	49.17	8.57
  Perennial Streams	71.5	44.4	0.044	0.070	15.21	64.29
  Intermittent Streams	1070.8	665.5	0.656	1.055	84.56	87.14
  Canals	10.8	6.7	0.007	0.011	61.58	64.29
  1° roads	0.0	0.0	0.000	0.000	31.31	50.00
  2° roads	0.0	0.0	0.000	0.000	15.35	12.86
  3° roads	0.0	0.0	0.000	0.000	4.07	11.43
  4° roads	829.2	515.4	0.508	0.817	7.48	4.29
  Total Roads	829.3	515.4	0.508	0.817	6.49	4.29
  Railroads	0.0	0.0	0.000	0.000	12.60	27.14
  Pipes and Powerlines	0.0	0.0	0.000	0.000	8.67	24.29

  
  Of the natural water in this HUC, 93.67% (by length) is intermittent [% in USA = 91.95, % in Region = 47.14]

  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