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Airsheds: Oxidized-Nitrogen Deposition into Coastal Estuaries

Characteristics of Oxidized-Nitrogen Airsheds
Watershed

Size (km2)

Size Factor Over Watershed Area
% Ox-N Deposition Explained
Airshed NOx Emissions as % of E. North American
Efficiency of Deposition %dep. per %emiss.
Casco Bay
624,000
244
47
10
4.7
Great Bay
547,000
214
60
13
4.6
Narragansett Bay
595,200
138
73
18
4.1
Long Island Sound
905,600
22
70
23
3.0
Hudson/Raritan Bay
912,000
22
62
25
2.5
Barnegat Bay
505,600
361
67
16
4.2
Delaware Bay
729,600
22
75
26
2.9
Delaware Inland Bays
326,400
584
52
12
4.3
Chesapeake Bay
1,081,600
6.5
76
34
2.2
Pamlico Sound
665,600
25
63
18
3.5
Winyah Bay
886,400
19
69
24
2.9
Charleston Harbor
806,400
20
56
18
3.1
St. Helena Sound
588,800
48
59
11
5.4
Altamaha
678,400
18
68
13
5.2
Tampa Bay
256,000
45
76
5
15.2
Apalachee Bay
441,600
31
50
9
5.6
Apalachicola Bay
812,800
16
69
17
4.1
Mobile Bay
992,000
8.7
68
17
4.0
Lake Pontchartrain
659,200
17
63
11
5.7
Barataria-Terrebonne
409,600
55
63
8
7.9

 

Contacts: Robin Dennis

Related Publications
  • Paerl H.W., Dennis, R.L., Whitall, D.R., Atmospheric deposition of nitrogen: Implications for nutrient over-enrichment of coastal waters, Estuaries 25(4B), 677-693, 2002. (abstract) Exit EPA Disclaimer

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