Salt Draw -- Cataloging Unit 13070004

• 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 5347.6 km² ( 2065.6 mi² ) [% in USA = 81.76, % in Region = 70.00]
  The area from the USGS is 2040 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 589)

  IV. Elevation Analysis

  This analysis is based on 2135874 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 1179.1 m ( 3868.4 ft ) [% in USA = 76.13, % in Region = 37.14]
  The elevation standard deviation is 244.5 m ( 802.2 ft ) [% in USA = 76.69, % in Region = 61.43]
  The coefficient of variation is 20.7 %.
  The vertical relief is 1565.4 m ( 5135.8 ft ) [% in USA = 77.45, % in Region = 58.57]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	780.0	909.9	973.0	1011.1	1066.0	1135.7	1212.2	1280.0	1361.9	1540.4	2345.4
  feet	2559.0	2985.2	3192.2	3317.2	3497.3	3726.0	3977.0	4199.4	4468.1	5053.7	7694.8

  

  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	12.4	7.7	0.002	0.004	5.26	45.71
  Intermittent Shoreline	29.8	18.5	0.006	0.009	78.26	57.14
  Perennial Streams	0.0	0.0	0.000	0.000	1.99	17.14
  Intermittent Streams	1701.9	1057.7	0.318	0.512	47.75	25.71
  Canals	3.9	2.4	0.001	0.001	43.63	48.57
  1° roads	138.2	85.9	0.026	0.042	76.08	94.29
  2° roads	5.5	3.4	0.001	0.002	16.63	17.14
  3° roads	67.8	42.1	0.013	0.020	13.55	25.71
  4° roads	4200.5	2610.6	0.785	1.264	21.55	38.57
  Total Roads	4412.0	2742.1	0.825	1.328	20.42	34.29
  Railroads	158.7	98.6	0.030	0.048	39.46	81.43
  Pipes and Powerlines	28.4	17.6	0.005	0.009	17.43	50.00

  
  Of the natural water in this HUC, 99.29% (by length) is intermittent [% in USA = 97.87, % in Region = 77.14]

  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