YEARS 8.P. (C 14 ) 
0 
DEPTH 
BELOW " 5 
MEAN 
SEA -.0 
LEVEL 
(METERS) 
-15 
-20 
2000 
4000 6000 8000 
' -1-.-L. 
HOLOCENE 
SEA LEVEL RISE 
COASTAL DELAWARE 
(AFTER BELKNAP AND KRAFT, 1977) 
Figure 2. Sea level history on Delmarva 
Phosphorus 
Nitrogen 
Percent ot point 
Basin 
source load from 
industry 
York 
Rappahannock 
Eastern Shore 
Patuxent 
West 
Chesapeake 
Potomac 
James 
Susquehanna 
Phosphorus 
Millions of pounds, March-October 
Basin 
Percent ot point 
source load Irom 
Industry 
York 
Rappahannock 
Eastern Shore 
Patuxent 
West 
Chesapeake 
James 
Susquehanna 
Potomac 
56 
28 
20 
2 
21 
24 
5 
5 
Nitrogen 
Millions of pounds, March-October 
Legend: Type 
industrial □ Municipal 
Figure 3. Discharge of phosphorus and nitrogen from point sources under 
existing (1980) conditions and percentage of point source 
discharge from industrial point sources (from EPA, 1983). 
23 
