Barrilla Draw -- Cataloging Unit 13070005

• 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 2237.0 km² ( 864.1 mi² ) [% in USA = 26.58, % in Region = 20.00]
  The area from the USGS is 850 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 267)

  IV. Elevation Analysis

  This analysis is based on 893505 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 1248.5 m ( 4096.1 ft ) [% in USA = 77.97, % in Region = 44.29]
  The elevation standard deviation is 327.8 m ( 1075.4 ft ) [% in USA = 85.46, % in Region = 77.14]
  The coefficient of variation is 26.3 %.
  The vertical relief is 1560.1 m ( 5118.4 ft ) [% in USA = 77.36, % in Region = 57.14]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	780.0	850.1	900.0	972.0	1067.5	1220.9	1391.9	1492.7	1561.5	1673.9	2340.1
  feet	2559.0	2789.0	2952.7	3188.9	3502.3	4005.5	4566.5	4897.2	5123.0	5491.7	7677.4

  

  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	2.0	1.3	0.001	0.001	2.94	24.29
  Intermittent Shoreline	1.7	1.1	0.001	0.001	50.54	10.00
  Perennial Streams	8.5	5.3	0.004	0.006	5.02	34.29
  Intermittent Streams	837.7	520.6	0.374	0.603	54.71	40.00
  Canals	0.0	0.0	0.000	0.000	35.62	40.00
  1° roads	22.9	14.2	0.010	0.016	55.33	74.29
  2° roads	18.5	11.5	0.008	0.013	25.34	28.57
  3° roads	94.1	58.5	0.042	0.068	41.12	77.14
  4° roads	1961.0	1218.8	0.877	1.410	27.85	52.86
  Total Roads	2096.6	1303.0	0.937	1.508	26.86	51.43
  Railroads	0.0	0.0	0.000	0.000	12.60	27.14
  Pipes and Powerlines	0.7	0.4	0.000	0.000	9.71	28.57

  
  Of the natural water in this HUC, 98.76% (by length) is intermittent [% in USA = 96.78, % in Region = 72.86]

  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