Appendix 2. Figures illustrating significant relationships among SAV, water quality parameters, weather parameters, and discharge in the tidal Potomac and Estuary, 1983-96


ILLUSTRATIONS

Parameters, abbreviations, and units used in the figures and tables.
Parameter Abbreviation Units
Secchi depth SECCHI meters (m)
Chlorophyll-a CHLA micrograms per liter (m g/l)
Total suspended solids TSS milligrams per liter (mg/l)
Total nitrogen TN milligrams per liter as N (mg/l)
Total phosphorus TP milligrams per liter as P (mg/l)
Water temperature WATEMP degrees C (° C)
Salinity SAL parts per thousand (ppt)
Nitrate plus nitrite NO23 milligrams per liter (mg/l)
SAV coverage SAV hectares
Difference in SAV coverage from previous year SAV_D hectares
Discharge DISCH cubic meters per second (m3/s)
Available sunshine AVSUN percent of total available (%)
Wind speed WINDSP kilometers per hour (km/hr)
Precipitation PRECIP millimeters (mm)
Conductivity COND microsiemans per cm (m S/cm)
Tidal fresh Potomac River TF2  
Upper tidal Potomac River UTR  
Lower tidal Potomac River LTR  
Oligohaline Potomac Estuary POTOH  
Mesohaline Potomac Estuary POTMH  



Figure 1. Map showing Chesapeake Bay Program Segments adopted for use after 1997


Stations
Figure 2. Significant growing season correlations at station XFB2470 (HP) in the freshwater tidal Potomac River
Figure 3. Significant growing season correlations at station XFB1433 (MH) in the freshwater tidal Potomac River
Figure 4. Significant growing season correlations at station XEA6596 (IH) in the freshwater tidal Potomac River
Figure 5. Significant growing season correlations at station XEA1840 (QN) in the freshwater tidal Potomac River
Figure 6. Significant growing season correlations at station XDA4238 (DP) in the oligohaline Potomac Estuary
Figure 7. Significant growing season correlations at station XDA1177 (MP) in the oligohaline Potomac Estuary
Figure 8. Significant growing season correlations at station XDB3321 (NY) in the oligohaline Potomac Estuary
Figure 9. Significant growing season correlations at station XDC1706 (301B) in the mesohaline Potomac Estuary
Figure 10. Significant growing season correlations at station MLE2.2 (RP) in the mesohaline Potomac Estuary
Figure 11. Significant growing season correlations at station MLE2.3 (PL) in the mesohaline Potomac Estuary

Segments
Figure 12. Significant growing season correlations for segment TF2 in the freshwater tidal Potomac River
Figure 13. Significant growing season correlations for segment UTR in the freshwater tidal Potomac River
Figure 14. Significant growing season correlations for segment LTR in the freshwater tidal Potomac River
Figure 15. Significant growing season correlations for segment POTOH in the oligohaline Potomac Estuary
Figure 16. Significant growing season correlations for segment POTMH in the mesohaline Potomac Estuary
Figure 17. Significant spring correlations for segment TF2 in the freshwater tidal Potomac River
Figure 18. Significant spring correlations for segment UTR in the freshwater tidal Potomac River
Figure 19. Significant spring correlations for segment LTR in the freshwater tidal Potomac River
Figure 20. Significant spring correlations for segment POTOH in the oligohaline Potomac Estuary
Figure 21 Significant spring correlations for segment POTMH in the mesohaline Potomac Estuary
Figure 22. Significant summer correlations for segment TF2 in the freshwater tidal Potomac River
Figure 23. Significant summer correlations for segment UTR in the freshwater tidal Potomac River
Figure 24. Significant summer correlations for segment LTR in the freshwater tidal Potomac River
Figure 25. Significant summer correlations for segment POTOH in the oligohaline Potomac Estuary
Figure 26 Significant summer correlations for segment POTMH in the mesohaline Potomac Estuary



For More Information Please Contact:  Virginia Carter, vpcarter@usgs.gov
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