Upper Angelina -- Cataloging Unit 12020004

• 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 4220.5 km² ( 1630.2 mi² ) [% in USA = 68.02, % in Region = 66.39]
  The area from the USGS is 1610 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1084)

  IV. Elevation Analysis

  This analysis is based on 1686019 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 119.7 m ( 392.7 ft ) [% in USA = 17.01, % in Region = 37.70]
  The elevation standard deviation is 26.6 m ( 87.3 ft ) [% in USA = 18.14, % in Region = 24.59]
  The coefficient of variation is 22.2 %.
  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	51.0	85.4	95.4	106.0	116.1	121.0	123.5	135.2	145.0	152.0	225.7
  feet	167.3	280.2	313.0	347.8	380.9	397.0	405.2	443.6	475.7	498.7	740.5

  

  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	380.3	236.3	0.090	0.145	52.11	55.74
  Intermittent Shoreline	2.7	1.7	0.001	0.001	47.23	27.87
  Perennial Streams	1885.8	1172.0	0.447	0.719	76.22	99.18
  Intermittent Streams	671.6	417.4	0.159	0.256	26.76	26.23
  Canals	2.0	1.2	0.000	0.001	41.26	55.74
  1° roads	4.6	2.8	0.001	0.002	41.50	30.33
  2° roads	205.2	127.5	0.049	0.078	81.43	85.25
  3° roads	358.5	222.8	0.085	0.137	67.08	92.62
  4° roads	6019.5	3741.1	1.426	2.295	73.95	44.26
  Total Roads	6587.8	4094.3	1.561	2.512	72.71	54.10
  Railroads	203.4	126.4	0.048	0.078	57.51	60.66
  Pipes and Powerlines	444.0	276.0	0.105	0.169	95.41	99.18

  
  Of the natural water in this HUC, 22.93% (by length) is intermittent [% in USA = 27.52, % in Region = 18.03]

  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