20081317 Ver 1_Table 11a 2010-2014 Hell Swamp Summary Hydroperiod_20160314

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Table 11a. Summary of occurrence of hydroperiods and drought status from 2009 to 2014 for riparian wells at Hell Swamp during all
rainfall conditions. (WH=wetland hydroperiod, NN= nearly normal, BN= below normal, MBN= much below normal, AN= above normal,
and MAN= much above normal).
Note: The longest hydroperiod at each well in Hell Swamp is depicted as a percentage of the 282 -day (or 283 -day for leap years)
growing season when the water table was recorded as -12" or above for each monitoring year. Also shown are the Palmer Drought
Severity Index (PDSI) and the Palmer Hydrological Drought Index (PHDI) drought rankings for the NOAA Central Coastal Plain region of
North Carolina by year. Drought rankings reflect the rankings given at the most recent year shown in the table; drought status may
Well
2010
2011
2012
2013
2014
# of
Years
with WH
% of Years
with WH for
All Years
PDSI
% of Years with
WH with NN and
BN Ranking
PHDI
% of Years with
WH with NN and
BN Ranking
16
14.9
23.4
17.0
27.0
26.2
5
100
100
100
171
6.4
24.8
23.0
17.4
24.8
5
100
100
100
42
6.4
25.5
23.7
6.4
26.2
5
100
100
100
53'
6.4
25.5
17.7
26.6
5
100
100
100
671
11.7
25.9
22.6
25.5
16.0
5
100
100
100
702
<6
7.8
7.1
24.8
12.8
4
80
66
75
75 3
<6
19.9
15.9
26.6
24.8
4
80
66
75
79 4
<6
7.1
<6
<6
<6
1
20
33
25
82 4
<6
19.9
14.1
12.8
12.8
4
80
66
75
915
<6
<6
<6
7.1
6.4
2
40
0
25
92 5
24.5
27.3
44.2
27.6
5
100
100
100
93 5
7.4
22.3
55.8
15.9
13.1
5
100
100
100
944
<6
<6
<6
<6
<6
0
0
0
0
123 4
<6
18.8
6.7
7.8
24.1
4
80
66
75
UT1-1A6
<6
<6
<6
7.1
13.1
2
40
0
25
UT1-1 C7
6.4
23.4
13.1
7.8
13.1
5
100
100
100
UT1-2A7
<6
19.9
21.9
26.9
26.2
4
80
66
75
UT1-2C6
7.8
29.1
24.0
28.7
29.1
5
100
100
100
UT1-3A7
<6
25.2
19.8
26.9
33.3
4
80
66
75
UT1-3C6
<6
25.2
19.4
26.6
25.9
4
80
66
75
UT2-1A8
6.4
22.7
38.5
26.2
26.2
5
100
100
100
UT2-1 C8
8.5
29.1
38.9
27.3
26.2
5
100
100
100
UT2-2A8
<6
19.5
22.3
30.5
25.5
4
80
66
75
UT2-2C8
<6
19.9
22.9
30.5
29.1
4
80
66
75
PDSI
NN
BN
NN
AN
AN
PHDI
NN
BN
BN
NN
AN

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Table 11a. (continued)
# of
% of Years
PDSI
PHDI
Well
2010
2011
2012
2013
2014
Years
with WH for
% of Years with
% of Years with
with WH
All Years
WH with NN and
WH with NN and
BN Ranking
BN Ranking
UT3-1A9
7.1
22.7
17.0
26.2
26.2
5
100
100
100
UT3-1 C9
8.5
23.4
22.3
26.9
27.0
5
100
100
100
UT3-2A9
<6
19.9
9.9
26.6
25.2
4
80
66
75
UT3-3A9
<6
23.4
8.8
15.9
15.6
4
80
66
75
UT3-3C9
<6
19.5
9.5
17.7
8.5
4
80
66
75
UT3-4A10
<6
16.7
6.4
15.9
13.1
4
80
66
75
UT3-4C10
<6
18.4
9.5
25.5
15.6
4
80
66
75
UT3-5A10
<6
23.8
45.9
56.7
25.9
4
80
66
75
UT3-5C10
<6
19.9
16.3
15.9
25.5
4
80
66
75
UT3-6A9
<6
23.4
14.8
8.2
15.6
4
80
66
75
UT3-7A7
<6
18.8
8.8
15.9
15.6
4
80
66
75
UT3-7C'
<6
23.4
14.1
15.9
15.6
4
80
66
75
UT3-8A11
<6
23.0
16.6
26.6
25.2
4
80
66
75
UT3-8C11
<6
23.4
17.0
26.6
25.9
4
80
66
75
UT3-9A11
6.0
24.8
22.6
28
26.6
5
100
100
100
UT3-9C11
6.4
36.2
22.6
57.1
41.8
5
100
100
100
UT4-1Al2
8.9
19.9
14.1
25.2
25.1
5
100
100
100
UT4-1 C12
15.6
23.4
44.2
31.6
26.2
5
100
100
100
UT4-2Al2
<6
19.1
7.1
15.9
29.1
4
80
66
75
UT5-1A13
24.8
36.2
44.1
41.8
31.9
5
100
100
100
UT5-1 C13
8.5
23.0
22.9
25.5
25.2
5
100
100
100
UT5-2A13
<6
16.7
13.7
27.3
13.1
4
80
66
75
UT6-4A14
<6
18.4
10.2
25.2
15.6
4
80
66
75
UT64C14
<6
7.1
9.9
15.9
15.6
4
80
66
75
UT6-5A14
<6
<6
11.3
25.2
16.0
3
60
33
50
UT6-5C14
<6
<6
7.4
15.9
13.1
3
60
33
50
UT6-6A14
<6
19.1
15.5
26.6
25.5
4
80
66
75
UT6-6C14
<6
18.8
10.2
25.5
16.0
4
80
66
75
PDSI
NN
BN
NN
AN
AN
PHDI
NN
BN
BN
NN
AN

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Table 11a. (continued)
# of
% of Years
PDSI
PHDI
Well
2010
2011
2012
2013
2014
Years
with WH for
% of Years with
% of Years with
with WH
All Years
WH with NN and
WH with NN and
BN Ranking
BN Ranking
UT7-1A14
<6
<6
6.0
15.9
13.1
3
60
33
50
UT7-1 C14
<6
8.2
7.4
16.3
13.1
4
80
66
75
UT7-2A15
<6
19.5
22.3
27.7
25.5
4
80
66
75
UT7-2C15
<6
18.8
14.1
26.6
25.2
4
80
66
75
UT7-3A15
<6
19.5
13.8
26.9
29.1
4
80
66
75
UT7-3C15
<6
18.4
14.1
63.8
49.6
4
80
66
75
UT8-1A10
8.9
22.3
10.9
7.8
13.1
5
100
100
100
UT8-1 C10
9.2
27.0
38.9
26.6
26.6
5
100
100
100
UT8-2A10
7.4
23.8
16.9
26.6
26.6
5
100
100
100
UT8-2C10
6.7
23.4
15.9
25.5
16.0
5
100
100
100
UT8-3A10
<6
18.8
9.5
17.4
24.8
4
80
66
75
UT8-3C10
<6
23.4
16.3
25.1
16.0
4
80
66
75
UT8-4A10
8.2
27.0
23.6
26.9
27.0
5
100
100
100
UT8-4C10
21.3
27.7
41.7
28.7
29.4
5
100
100
100
UT8-5Al2
<6
<6
<6
<6
7.8
1
20
0
0
UT8-5C12
<6
<6
<6
7.1
13.1
2
40
0
25
UT8-6Al2
<6
23.4
19.4
26.6
26.2
4
80
66
75
UT8-6C12
7.1
36.2
23.3
27.3
27.0
5
100
100
100
USC -1A13
24.8
27.0
43.1
31.2
30.0
5
100
100
100
USC -1C13
24.8
27.7
41.6
28.7
27.7
5
100
100
100
USC -2A13
<6
7.1
<6
<6
6.0
2
40
33
25
USC -2C13
<6
22.3
6.7
6.7
12.4
4
80
66
75
USC -3C16
<6
18.4
8.1
15.9
15.6
4
80
66
75
USC -4A17
<6
18.8
6.4
7.4
12.8
4
80
66
75
USC -4C17
6.4
18.8
8.5
7.8
12.8
5
100
100
100
USC -5A17
8.2
36.2
43.8
56.7
62.4
5
100
100
100
USC -5C17
8.2
36.2
25.1
27.3
30.1
5
100
100
100
USC -6A17
24.1
36.2
41.7
56.7
31.2
5
100
100
100
PDSI
NN
BN
NN
AN
AN
PHDI
NN
BN
BN
NN
AN

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Table 11a. (concluded)
Well
2010
2011
2012
2013
2014
# of
Years
with WH
% of Years
with WH for
All Years
PDSI
% of Years with
WH with NN and
BN Ranking
PHDI
% of Years with
WH with NN and
BN Ranking
USC -6C17
24.1
36.2
46.6
26.7
5Installed 6 May 2010
5
100
100
100
USC -7A17
24.1
36.2
t
30.8
31.2
1 5
100
100
100
USC -7C17
24.1
36.2
46.3
31.2
33.7
5
100
100
100
USC -8A17
24.8
36.2
41.7
31.2
31.2
5
100
100
100
USC -8C17
24.8
36.2
41.7
30.8
30.9
5
100
100
100
USC -9A18
<6
22.3
19.8
25.5
29.1
4
80
66
75
USC -9C18
<6
22.0
21.9
26.9
29.1
4
80
66
75
USC -10A18
7.8
36.2
23.7
30.5
30.1
5
100
100
100
USC-11Al2
20.9
36.2
26.7
31.6
5
100
100
100
USC -11C12
24.1
36.2
33.3
34.0
5
100
100
100
USC-12Al2
18.1
36.2
23.3
27.6
31.6
5
100
100
100
USC -12C12
24.1
36.2
39
35.1
5
100
100
100
USC-13Al2
24.1
36.2
46.6
32.2
31.6
5
100
100
100
USC -13C12
9.6
36.2
22.6
27.3
29.4
5
100
100
100
PDSI
NN
BN NN AN AN
PHDI
I NN
BN BN NN AN
If no installation date is given, well was installed before 28 Feburary 2010.
1Installed 24 March 2010
12 Installed 25 May 2010
2Installed 31 March 2010
13 Installed 1 July 2010
3Installed 26 March 2010
14 Installed 16 June 2010
4Installed 8 April 2010
15 Installed 30 June 2010
5Installed 6 May 2010
16installed 26 July 2010
6Installed 27 May 2010
17 Installed 18 July 2010
7Installed 26 May 2010
18installed 18 May 2010
8Installed 2 July 2010
Italicized= Well malfunction resulted in an estimaton of exact hydroperiod length and so
91nstalled 3 June 2010
reported hydroperiod could possibly be shorter than what occurred.
1OInstalled 9 June 2010
"Installed 2 June 2010