summary of water conditions in delaware
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
Stefanie J. Baxter
Presented to the Presented to the
Water Supply Coordinating CouncilWater Supply Coordinating Council
September 24, 2009September 24, 2009
Summary of Summary of Water Conditions in DelawareWater Conditions in Delaware
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
Water Conditions Index for NCCWater Conditions Index for NCCAugust 2008 through August 2009August 2008 through August 2009
Drought Watch
Drought Warning
Drought Emergency
4.3
13.44
0
2
4
6
8
10
12
14
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
Precipitation at Wilmington Precipitation at Wilmington August 2008 – August 2009August 2008 – August 2009
Data provided byCity of Wilmington,
DEOS, and NWS
Current 12-monthrunning surplus = 1.70 inches
Inch
es
Normal
Actual
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
Aug-08Sep-08 Oct-08 Nov-08Dec-08 Jan-09 Feb-09 Mar-09 Apr-09 May-09 Jun-09 Jul-09 Aug-09Sep-09 Oct-09 Nov-09Dec-09
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
Well Db24-18 Near OgletownWell Db24-18 Near OgletownJanuary 2008 – September 2009January 2008 – September 2009
Drought Watch = 14.00 to 14.99'Drought Warning = 15.00 to 15.99'
Drought Emergency = >16.00'
Actual September water level = 12.10'
Data Source:http://waterdata.usgs.gov
/de/nwis/
Brandywine Creek at WilmingtonBrandywine Creek at WilmingtonApril 1, 2009 – September 21, 2009April 1, 2009 – September 21, 2009
Drought Watch = 85 MGD
195 MGD
30-day moving averagethrough September 21, 2009 = 267.4 MGD
Data Source:http://waterdata.usgs.gov
/de/nwis/
White Clay Creek near NewarkWhite Clay Creek near NewarkApril 1, 2009 – September 21, 2009April 1, 2009 – September 21, 2009
Drought Watch = 42 MGD
30-day moving average White Clay at Stanton (filter plant)
through September 21, 2009 = 156.2 MGD
44 MGD
Data provided byDelaware Department
of Transportation
Precipitation at DoverPrecipitation at DoverAugust 2008 – August 2009August 2008 – August 2009
Inch
es
Normal
Actual
0
1
2
3
4
5
6
7
8
9
10
A-08 S-08 O-08 N-08 D-08 J-09 F-09 M-09 A-09 M-09 J-09 J-09 A-09 S-09 O-09 N-09 D-09
0
1
2
3
4
5
6
7
8
9
10
Current 12-month running surplus = 2.55 inches
Well Hb14-01 Well Hb14-01 January 2008 – September 2009January 2008 – September 2009
Actual September water level = 8.20'
Normal for September is between 6.79' and 9.07'
Modified from:http://waterdata.usgs.gov
/de/nwis/
St. Jones River at DoverSt. Jones River at DoverApril 1, 2009 – September 21, 2009 April 1, 2009 – September 21, 2009 Mean flow for September = 20.2 MGD
8.4 MGD
30-day moving averagethrough September 21, 2009 = 51.4 MGD
Data provided byCity of Lewes
Precipitation at Lewes Precipitation at Lewes August 2008 – August 2009August 2008 – August 2009
Inch
es
Normal
Actual
0
1
2
3
4
5
6
7
8
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 Sep-09 Oct-09 Nov-09 Dec-09
0
1
2
3
4
5
6
7
8
Current 12-monthrunning surplus = 6.21 inches
Well Qe44-01 Near Trap PondWell Qe44-01 Near Trap PondJanuary 2008 – September 2009January 2008 – September 2009
Normal for September is between 8.90' and 11.30'
Actual September water level = 8.20 '
Nanticoke River near Bridgeville Nanticoke River near Bridgeville April 1, 2009 – September 21, 2009April 1, 2009 – September 21, 2009
Modified from:http://waterdata.usgs.gov
/de/nwis/
48 MGD
30-day moving averagethrough September 21, 2009 = 71.1 MGD
Mean flow for September = 50.3 MGD