Maravillas -- Cataloging Unit 13040206

• 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 3429.4 km² ( 1324.7 mi² ) [% in USA = 54.52, % in Region = 44.29]
  The area from the USGS is 1320 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 194)

  IV. Elevation Analysis

  This analysis is based on 1370113 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 1086.6 m ( 3564.9 ft ) [% in USA = 74.14, % in Region = 30.00]
  The elevation standard deviation is 236.0 m ( 774.3 ft ) [% in USA = 75.56, % in Region = 52.86]
  The coefficient of variation is 21.7 %.
  The vertical relief is 1485.7 m ( 4874.3 ft ) [% in USA = 76.27, % in Region = 52.86]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	489.0	788.2	863.8	931.0	1006.6	1081.9	1153.9	1218.0	1279.0	1399.3	1974.7
  feet	1604.3	2585.9	2834.0	3054.4	3302.5	3549.5	3785.7	3996.0	4196.1	4590.8	6478.6

  

  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	0.7	0.5	0.000	0.000	1.37	12.86
  Intermittent Shoreline	1.8	1.1	0.001	0.001	44.95	5.71
  Perennial Streams	42.7	26.6	0.012	0.020	7.58	42.86
  Intermittent Streams	1560.8	970.1	0.455	0.732	64.09	55.71
  Canals	0.0	0.0	0.000	0.000	35.62	40.00
  1° roads	0.2	0.1	0.000	0.000	32.59	54.29
  2° roads	103.7	64.5	0.030	0.049	56.99	81.43
  3° roads	0.0	0.0	0.000	0.000	4.07	11.43
  4° roads	3192.5	1984.1	0.931	1.498	31.22	58.57
  Total Roads	3296.4	2048.7	0.961	1.547	28.28	55.71
  Railroads	42.2	26.3	0.012	0.020	22.60	50.00
  Pipes and Powerlines	0.0	0.0	0.000	0.000	8.67	24.29

  
  Of the natural water in this HUC, 97.29% (by length) is intermittent [% in USA = 95.12, % in Region = 61.43]

  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