Lower Pecos -- Cataloging Unit 13070008

• 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 7652.8 km² ( 2956.0 mi² ) [% in USA = 94.36, % in Region = 84.29]
  The area from the USGS is 2970 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 470)

  IV. Elevation Analysis

  This analysis is based on 3055955 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 718.0 m ( 2355.6 ft ) [% in USA = 64.76, % in Region = 14.29]
  The elevation standard deviation is 128.6 m ( 421.9 ft ) [% in USA = 61.30, % in Region = 24.29]
  The coefficient of variation is 17.9 %.
  The vertical relief is 632.1 m ( 2073.8 ft ) [% in USA = 58.83, % in Region = 20.00]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	355.3	520.9	599.7	660.9	701.0	734.3	772.2	805.2	829.5	868.0	987.4
  feet	1165.7	1709.0	1967.5	2168.3	2299.8	2409.1	2533.4	2641.7	2721.4	2847.7	3239.5

  

  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	61.5	38.2	0.008	0.013	10.47	60.00
  Intermittent Shoreline	34.7	21.6	0.005	0.007	75.08	47.14
  Perennial Streams	525.4	326.5	0.069	0.110	20.27	77.14
  Intermittent Streams	2111.1	1312.0	0.276	0.444	41.50	12.86
  Canals	4.4	2.7	0.001	0.001	42.30	47.14
  1° roads	90.6	56.3	0.012	0.019	57.41	80.00
  2° roads	130.6	81.2	0.017	0.027	38.09	58.57
  3° roads	189.7	117.9	0.025	0.040	26.05	51.43
  4° roads	7652.2	4755.9	1.000	1.609	36.38	65.71
  Total Roads	8063.0	5011.2	1.054	1.695	33.44	65.71
  Railroads	82.7	51.4	0.011	0.017	21.22	47.14
  Pipes and Powerlines	277.3	172.3	0.036	0.058	57.65	90.00

  
  Of the natural water in this HUC, 78.52% (by length) is intermittent [% in USA = 76.93, % in Region = 28.57]

  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