Blackwater -- Cataloging Unit 10300104

• Lower Missouri-Blackwater Accounting Unit 103001
  
• Lower Missouri Subregion 1030
  
• Missouri Region 10 (There are 310 cataloging units in this region.)
  The state composition by area is 100.0% Missouri.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 4065.4 km² ( 1570.3 mi² ) [% in USA = 65.75, % in Region = 55.81]
  The area from the USGS is 1510 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1002)

  IV. Elevation Analysis

  This analysis is based on 1624212 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 237.8 m ( 780.2 ft ) [% in USA = 29.56, % in Region = 0.97]
  The elevation standard deviation is 23.8 m ( 78.1 ft ) [% in USA = 14.97, % in Region = 2.26]
  The coefficient of variation is 10.0 %.
  The vertical relief is 153.6 m ( 503.9 ft ) [% in USA = 19.14, % in Region = 5.16]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	175.2	211.3	213.0	221.2	234.0	242.6	243.0	244.0	254.0	274.0	328.8
  feet	574.8	693.2	698.8	725.7	767.7	795.9	797.2	800.5	833.3	898.9	1078.7

  

  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	277.4	172.4	0.068	0.110	43.68	60.00
  Intermittent Shoreline	2.1	1.3	0.001	0.001	44.86	20.32
  Perennial Streams	1069.3	664.6	0.263	0.423	50.88	79.68
  Intermittent Streams	3036.4	1887.1	0.747	1.202	90.19	72.58
  Canals	4.2	2.6	0.001	0.002	45.71	48.06
  1° roads	84.4	52.5	0.021	0.033	70.63	86.13
  2° roads	137.0	85.1	0.034	0.054	62.62	75.16
  3° roads	1025.4	637.3	0.252	0.406	96.40	97.10
  4° roads	4472.8	2779.9	1.100	1.770	45.10	73.87
  Total Roads	5719.6	3554.7	1.407	2.264	61.91	91.94
  Railroads	256.3	159.3	0.063	0.101	69.35	83.87
  Pipes and Powerlines	192.1	119.4	0.047	0.076	68.50	86.45

  
  Of the natural water in this HUC, 69.29% (by length) is intermittent [% in USA = 69.16, % in Region = 39.35]

  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