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Summary of Water Conditions in Delaware

Summary of Water Conditions in Delaware. Presented to the Water Supply Coordinating Council September 24, 2009. Stefanie J. Baxter. Water Conditions Index for NCC August 2008 through August 2009. Factors Used in Calculating the Index 6-month antecedent precipitation

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Summary of Water Conditions in Delaware

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  1. Summary of Water Conditions in Delaware Presented to the Water Supply Coordinating Council September 24, 2009 Stefanie J. Baxter

  2. Water Conditions Index for NCC August 2008 through August 2009 Factors Used in Calculating the Index • 6-month antecedent precipitation • Flow on the Brandywine River • Groundwater level in well Db24-18 • Population of northern NCC 14 13.44 12 10 8 4.3 6 Drought Watch Drought Warning 4 Drought Emergency 2 0 Aug-08 Sep-08 Oct-08 Nov-08 Dec-08 Jan-09 Feb-09 Mar-09 Apr-09 May-09 Jun-09 Jul-09 Aug-09

  3. Precipitation at Wilmington August 2008 – August 2009 Current 12-month running surplus= 1.70 inches Normal Actual Inches Data provided by City of Wilmington, DEOS, and NWS

  4. Well Db24-18 Near OgletownJanuary 2008 – September 2009 Actual September water level = 12.10' Drought Watch = 14.00 to 14.99' Drought Warning = 15.00 to 15.99' Drought Emergency = >16.00'

  5. 30-day moving average through September 21, 2009 = 267.4 MGD Brandywine Creek at Wilmington April 1, 2009 – September 21, 2009 Drought Watch = 85 MGD 195 MGD Data Source: http://waterdata.usgs.gov /de/nwis/

  6. 30-day moving average White Clay at Stanton (filter plant) through September 21, 2009 = 156.2 MGD White Clay Creek near Newark April 1, 2009 – September 21, 2009 Drought Watch = 42 MGD 44 MGD Data Source: http://waterdata.usgs.gov /de/nwis/

  7. Precipitation at Dover August 2008 – August 2009 Current 12-month running surplus= 2.55 inches Normal Actual Inches Data provided by Delaware Department of Transportation

  8. Well Hb14-01 January 2008 – September 2009 Actual September water level = 8.20' Normal for September is between 6.79' and 9.07'

  9. 30-day moving average through September 21, 2009 = 51.4 MGD St. Jones River at Dover April 1, 2009 – September 21, 2009 Mean flow for September = 20.2 MGD 8.4 MGD Modified from: http://waterdata.usgs.gov /de/nwis/

  10. Precipitation at Lewes August 2008 – August 2009 Current 12-month running surplus= 6.21 inches Normal Actual Inches Data provided by City of Lewes

  11. Well Qe44-01 Near Trap PondJanuary 2008 – September 2009 Normal for September is between 8.90' and 11.30' Actual September water level = 8.20 '

  12. 30-day moving average through September 21, 2009 = 71.1 MGD Nanticoke River near Bridgeville April 1, 2009 – September 21, 2009 Mean flow for September = 50.3 MGD 48 MGD Modified from: http://waterdata.usgs.gov /de/nwis/

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