Broadkill-Smyrna -- Cataloging Unit 02040207

• Lower Delaware Accounting Unit 020402
  
• Delaware Subregion 0204
  
• Mid-Atlantic Region 02 (There are 95 cataloging units in this region.)
  The state composition by area is 100.0% Delaware.
  

  I. Graphical Locater Maps

  Roads

  Water Only

  8 Digit HUCs

  The area of this HUC in these maps is 1645.7 km² ( 635.7 mi² ) [% in USA = 11.08, % in Region = 16.84]
  The area from the USGS is 628 mi².
  

  II. Flow Connections (upstream and downstream units)

  III. Named places in this watershed (total = 1343)

  IV. Elevation Analysis

  This analysis is based on 656950 elevations on a 50 m grid within the area of this HUC.
  The mean elevation is 7.0 m ( 23.0 ft ) [% in USA = 2.04, % in Region = 10.53]
  The elevation standard deviation is 6.2 m ( 20.3 ft ) [% in USA = 2.75, % in Region = 12.63]
  The coefficient of variation is 88.6 %.
  The vertical relief is 24.8 m ( 81.4 ft ) [% in USA = 1.85, % in Region = 8.42]

  Elevation Percentiles

  	0 %	10 %	20 %	30 %	40 %	50 %	60 %	70 %	80 %	90 %	100 %
  meters	0.0	0.0	0.0	1.0	3.0	6.0	8.0	13.0	15.0	15.0	24.8
  feet	0.0	0.0	0.0	3.3	9.8	19.7	26.2	42.7	49.2	49.2	81.4

  

  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	633.4	393.7	0.385	0.619	93.75	83.16
  Intermittent Shoreline	0.0	0.0	0.000	0.000	26.95	49.47
  Perennial Streams	1082.1	672.5	0.658	1.058	95.03	90.53
  Intermittent Streams	188.9	117.4	0.115	0.185	21.27	63.16
  Canals	63.9	39.7	0.039	0.062	81.67	95.79
  1° roads	3.8	2.3	0.002	0.004	44.29	12.63
  2° roads	172.2	107.0	0.105	0.168	99.05	94.74
  3° roads	340.1	211.4	0.207	0.332	92.28	81.05
  4° roads	2502.7	1555.4	1.521	2.447	79.58	51.58
  Total Roads	3018.8	1876.2	1.834	2.951	85.41	55.79
  Railroads	140.1	87.1	0.085	0.137	81.29	60.00
  Pipes and Powerlines	90.5	56.2	0.055	0.088	74.85	57.89

  
  Of the natural water in this HUC, 9.92% (by length) is intermittent [% in USA = 14.87, % in Region = 57.89]

  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