Lower Angelina -- Cataloging Unit 12020005

• Neches Subregion 1202
  
• Texas-Gulf Region 12 (There are 122 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 5038.2 km² ( 1946.1 mi² ) [% in USA = 78.21, % in Region = 75.41]
  The area from the USGS is 1940 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1278)

  IV. Elevation Analysis

  This analysis is based on 2013498 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 85.9 m ( 281.8 ft ) [% in USA = 13.50, % in Region = 31.97]
  The elevation standard deviation is 29.6 m ( 97.1 ft ) [% in USA = 21.46, % in Region = 28.69]
  The coefficient of variation is 34.5 %.
  The vertical relief is 174.7 m ( 573.2 ft ) [% in USA = 23.78, % in Region = 37.70]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	26.1	48.0	60.0	68.9	76.0	83.8	91.0	102.7	110.2	124.8	200.8
  feet	85.6	157.5	196.8	226.0	249.3	274.9	298.6	336.9	361.5	409.4	658.8

  

  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	1309.6	813.9	0.260	0.418	87.21	86.89
  Intermittent Shoreline	13.2	8.2	0.003	0.004	68.26	51.64
  Perennial Streams	1741.8	1082.5	0.346	0.556	63.86	93.44
  Intermittent Streams	994.5	618.1	0.197	0.318	31.45	31.97
  Canals	0.0	0.0	0.000	0.000	35.62	41.80
  1° roads	12.9	8.0	0.003	0.004	44.77	40.16
  2° roads	186.7	116.0	0.037	0.060	67.36	59.84
  3° roads	256.8	159.6	0.051	0.082	47.28	63.93
  4° roads	6018.0	3740.2	1.194	1.922	53.15	12.30
  Total Roads	6474.4	4023.9	1.285	2.068	49.98	14.75
  Railroads	196.9	122.4	0.039	0.063	48.18	50.82
  Pipes and Powerlines	293.3	182.3	0.058	0.094	77.36	79.51

  
  Of the natural water in this HUC, 24.83% (by length) is intermittent [% in USA = 29.04, % in Region = 18.85]

  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