Tunas -- Cataloging Unit 13070009

• Lower Pecos Subregion 1307
  
• 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 2684.3 km² ( 1036.9 mi² ) [% in USA = 38.99, % in Region = 30.00]
  The area from the USGS is 1010 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 155)

  IV. Elevation Analysis

  This analysis is based on 1072111 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 1011.2 m ( 3317.5 ft ) [% in USA = 72.67, % in Region = 27.14]
  The elevation standard deviation is 158.3 m ( 519.4 ft ) [% in USA = 65.61, % in Region = 32.86]
  The coefficient of variation is 15.7 %.
  The vertical relief is 810.0 m ( 2657.4 ft ) [% in USA = 62.39, % in Region = 24.29]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	683.0	803.1	882.1	921.8	962.2	1005.0	1036.0	1070.6	1141.0	1246.2	1493.0
  feet	2240.8	2634.8	2894.0	3024.2	3156.8	3297.2	3398.9	3512.4	3743.4	4088.5	4898.2

  

  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	2.5	1.5	0.001	0.001	3.03	25.71
  Intermittent Shoreline	2.3	1.4	0.001	0.001	52.25	12.86
  Perennial Streams	0.0	0.0	0.000	0.000	1.99	17.14
  Intermittent Streams	617.0	383.4	0.230	0.370	35.48	7.14
  Canals	0.0	0.0	0.000	0.000	35.62	40.00
  1° roads	60.2	37.4	0.022	0.036	72.43	90.00
  2° roads	89.2	55.4	0.033	0.053	61.77	87.14
  3° roads	39.2	24.3	0.015	0.023	15.77	31.43
  4° roads	2188.5	1360.2	0.815	1.312	23.02	44.29
  Total Roads	2377.0	1477.3	0.886	1.425	23.59	47.14
  Railroads	0.0	0.0	0.000	0.000	12.60	27.14
  Pipes and Powerlines	19.6	12.2	0.007	0.012	20.61	57.14

  
  Of the natural water in this HUC, 99.60% (by length) is intermittent [% in USA = 98.34, % in Region = 81.43]

  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