Upper Neches -- Cataloging Unit 12020001

• 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 4985.8 km² ( 1925.8 mi² ) [% in USA = 77.74, % in Region = 73.77]
  The area from the USGS is 1940 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1149)

  IV. Elevation Analysis

  This analysis is based on 1990917 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 133.8 m ( 439.0 ft ) [% in USA = 18.47, % in Region = 42.62]
  The elevation standard deviation is 26.5 m ( 86.9 ft ) [% in USA = 17.91, % in Region = 23.77]
  The coefficient of variation is 19.8 %.
  The vertical relief is 172.4 m ( 565.6 ft ) [% in USA = 23.07, % in Region = 36.07]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	62.0	99.3	111.1	121.0	124.2	135.8	143.2	151.3	152.1	166.2	234.4
  feet	203.4	325.8	364.5	397.0	407.5	445.5	469.8	496.4	499.0	545.3	769.0

  

  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	730.1	453.7	0.146	0.236	71.10	71.31
  Intermittent Shoreline	2.6	1.6	0.001	0.001	45.10	24.59
  Perennial Streams	1546.4	961.1	0.310	0.499	58.69	90.98
  Intermittent Streams	1455.3	904.5	0.292	0.470	43.68	47.54
  Canals	0.0	0.0	0.000	0.000	35.62	41.80
  1° roads	52.2	32.4	0.010	0.017	55.57	57.38
  2° roads	212.0	131.7	0.043	0.068	74.61	72.13
  3° roads	297.6	185.0	0.060	0.096	54.62	77.87
  4° roads	7234.3	4496.2	1.451	2.335	75.41	49.18
  Total Roads	7796.1	4845.3	1.564	2.516	73.05	55.74
  Railroads	301.3	187.3	0.060	0.097	67.41	74.59
  Pipes and Powerlines	300.7	186.9	0.060	0.097	79.35	82.79

  
  Of the natural water in this HUC, 39.04% (by length) is intermittent [% in USA = 42.35, % in Region = 28.69]

  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