water-quality measurements in san francisco bay – a component of ~ 40,000 measurements per year
TRANSCRIPT
Water-Quality Measurements in San Francisco Bay – a component of
~ 40,000 measurements
per year
San Francisco Convention & Visitors Bureau Photo
Why Monitoring?
1960 1970 1980 1990 20000
5
10
15
Bot
tom
DO
(m
g/L)
0
10
20E
fflue
nt A
mm
onia
(m
g/L)
SERL USGS
USGS-RMP
#1 – Measures Benefits of Actions to Improve Water Quality
“Nutrient over-enrichment is a significant problem for the coastal regions of the United States…
Of 139 coastal sites .. 44 experiencing symptoms such as low dissolved oxygen, nuisance and toxic algal blooms…
National Coastal Nutrient Management strategy … to provide local decision-makers and those responsible for implementing management activities with the information they will need to determine appropriate source reduction goals and methods at the local level.”
NRC (2000)
1980 1990 20000
20
40
60
Chl
orop
hyll
(g/
L)
0
10
20E
fflue
nt N
itrat
e (
mg/L
)
#2 – Measures Environmental Condition so Management Priorities can be Established
http://www.nwfsc.noaa.gov/hab/anatomy.htm
But … continued monitoring is essential because ….
Dinophysis acuminata
Pseudonitzschia delicastissima
1975 1980 1985 1990 1995 20000
100
200
300
400
500C
oppe
r in
Macom
a (
g/g)wwrcamnl.wr.usgs.gov/tracel/data
#3 – Measures Benefits of Reducing Point-Source Inputs of Contaminants
#4 – Identifies Changes in Contaminant Sources
Then, point-source inputs
Now, urban runoff
#5 – Measures Disturbance by Alien
Species
Interagency Ecological Program and USGS
“The ecological impacts of the Potamocorbula invasion are as dramatic as any documented in the literature, and provided the impetus for the Board’s 303(d) listing decision.”
303(d) LIST FOR SAN FRANCISCO BAY
Exotic Species
Mercury
Copper
Diazinon
PCB’s
Selenium
Nickel
Monitoring of the Bay is not complete
• Nutrients
• Phytoplankton Community
• Zooplankton
• Ecosystem Processes
• Benthos