Navasota -- Cataloging Unit 12070103

• Lower Brazos Accounting Unit 120701
  
• Lower Brazos Subregion 1207
  
• 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 5777.0 km² ( 2231.5 mi² ) [% in USA = 85.17, % in Region = 81.15]
  The area from the USGS is 2260 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1170)

  IV. Elevation Analysis

  This analysis is based on 2307083 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 119.8 m ( 393.0 ft ) [% in USA = 17.05, % in Region = 38.52]
  The elevation standard deviation is 31.9 m ( 104.7 ft ) [% in USA = 23.69, % in Region = 31.97]
  The coefficient of variation is 26.6 %.
  The vertical relief is 168.0 m ( 551.2 ft ) [% in USA = 22.03, % in Region = 33.61]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	45.0	76.0	91.0	100.2	107.0	121.0	132.2	137.0	151.1	161.7	213.0
  feet	147.6	249.3	298.6	328.7	351.0	397.0	433.7	449.5	495.7	530.5	698.8

  

  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	772.4	480.0	0.134	0.215	66.75	68.03
  Intermittent Shoreline	22.5	14.0	0.004	0.006	73.66	59.02
  Perennial Streams	1156.1	718.5	0.200	0.322	40.03	68.03
  Intermittent Streams	2473.4	1537.3	0.428	0.689	61.39	74.59
  Canals	0.8	0.5	0.000	0.000	38.28	48.36
  1° roads	8.4	5.2	0.001	0.002	42.35	33.61
  2° roads	139.8	86.9	0.024	0.039	47.66	32.79
  3° roads	324.8	201.9	0.056	0.090	51.97	72.13
  4° roads	7671.1	4767.6	1.328	2.137	66.60	28.69
  Total Roads	8144.1	5061.6	1.410	2.268	62.15	30.33
  Railroads	304.1	189.0	0.053	0.085	61.06	66.39
  Pipes and Powerlines	248.4	154.4	0.043	0.069	64.61	57.38

  
  Of the natural water in this HUC, 56.41% (by length) is intermittent [% in USA = 56.89, % in Region = 44.26]

  VI. Other sites

  • EPA- Surf Your Watershed - Index of Watershed Indicators
  • USGS- Science in Your Watershed - Selected Realtime Streamflow Stations
  • CTIC- Known Your Watershed

  ---

  1999 SEPT 4, Last updated on 2003 JAN 23
  
  D.L. Gustafson, dlg@rapid.msu.montana.edu