Is Stormwater Harming Our Streams?

42
STREAMS? harming our STORMWATER Is

Transcript of Is Stormwater Harming Our Streams?

Page 1: Is Stormwater Harming Our Streams?

STREAMS?harming our

STORMWATERIs

Page 2: Is Stormwater Harming Our Streams?

urbanizedwatersheds

Page 3: Is Stormwater Harming Our Streams?

stormwater

Page 4: Is Stormwater Harming Our Streams?

METALS

Page 5: Is Stormwater Harming Our Streams?

Long-term stream monitoring

King County, WA

Page 6: Is Stormwater Harming Our Streams?

Toxicity

Page 7: Is Stormwater Harming Our Streams?

ToxicityBaseflow comparison

Page 8: Is Stormwater Harming Our Streams?

ToxicityBaseflow comparisonTrends over time

Page 9: Is Stormwater Harming Our Streams?

ToxicityBaseflow comparisonTrends over timePollutant sources

Page 10: Is Stormwater Harming Our Streams?

33 sites

Seattle

Tacoma

Page 11: Is Stormwater Harming Our Streams?

1993-2010

Page 12: Is Stormwater Harming Our Streams?

grabsamples

2-6x/yr

Page 13: Is Stormwater Harming Our Streams?

after 24h dry & ¼” rain

Page 14: Is Stormwater Harming Our Streams?

ICP-MS

24 metalstotal & dissolved

Page 15: Is Stormwater Harming Our Streams?

Toxicity

Page 16: Is Stormwater Harming Our Streams?

Human health (WA Water Quality Stds)

Page 17: Is Stormwater Harming Our Streams?

rare:

Nickel Thallium

widespread:

Arsenic

Human health (WA Water Quality Stds)

Page 18: Is Stormwater Harming Our Streams?

Aquatic life (WA Water Quality Stds)

Page 19: Is Stormwater Harming Our Streams?

rare:

Copper Lead

common:

Mercury

Aquatic life (WA Water Quality Stds)

Page 20: Is Stormwater Harming Our Streams?

Salmonids (draft screening values)

Page 21: Is Stormwater Harming Our Streams?

Copper Lead

Salmonids (draft screening values)

Cadmium

Zinc

common towidespread:

Silver

???:

Page 22: Is Stormwater Harming Our Streams?

Baseflowcomparison

Page 23: Is Stormwater Harming Our Streams?

Baseflowcomparison2001-2003

Page 24: Is Stormwater Harming Our Streams?

Total concentrationshigher in stormflow:

As Cd Cr Cu Ni Pb Sb V Zn

Toxics:

Others:

Ba Be Co Fe

Page 25: Is Stormwater Harming Our Streams?

Total concentrations and dissolvedhigher in stormflow:

As Cd Cr CuNi Pb Sb V Zn

Ba Be Co Fe

Toxics:

Others:

Page 26: Is Stormwater Harming Our Streams?

Trends

Page 27: Is Stormwater Harming Our Streams?

Cr Cu Ni Pb Zn

Some toxics decreased

Page 28: Is Stormwater Harming Our Streams?

Cr Cu Ni Pb Zn

Some toxics decreased

Hardness increased

protectiveCa Mg

Page 29: Is Stormwater Harming Our Streams?

Sources

Page 30: Is Stormwater Harming Our Streams?
Page 31: Is Stormwater Harming Our Streams?

weathering

Page 32: Is Stormwater Harming Our Streams?

Iron as tracer

weathering

Page 33: Is Stormwater Harming Our Streams?

most metals

most streams

weathering

Page 34: Is Stormwater Harming Our Streams?

total

dissolved

Page 35: Is Stormwater Harming Our Streams?

Iron correlations

tota

l copper

(µg/L

)

total iron (µg/L)

Page 36: Is Stormwater Harming Our Streams?

Iron correlations

tota

l copper

(µg/L

)

total iron (µg/L)

Page 37: Is Stormwater Harming Our Streams?

tota

l copper

(µg/L

)

total iron (µg/L)

Iron correlations

Page 38: Is Stormwater Harming Our Streams?

Mill Creek:to

tal m

eta

l (µ

g/L

)

total iron (µg/L)

Page 39: Is Stormwater Harming Our Streams?

Mill Creek: Old industrial dumpto

tal m

eta

l (µ

g/L

)

total iron (µg/L)

Page 40: Is Stormwater Harming Our Streams?

Toxicity concerns:mercurycopper, lead, zinc

Trends were improving.

Weathering was amajor source.

Page 41: Is Stormwater Harming Our Streams?
Page 42: Is Stormwater Harming Our Streams?

Photo credits:• Stream sampling: King County DNRP• Lake Union aerial: Jelson25 (Wikipedia)• Stormwater outfall: Blake Feist (NOAA Fisheries)• Blacksmith: NBC News• Rain: Tuncay (Flickr)• ICP: Wblanchard (Wikipedia)• Toddler in lake: King County DNRP• Nickel: US Mint• Thallium: Rob Lavinsky irocks.com (Flickr)• Arsenic: Tomihahndorf (Wikipedia)• Aquarium: Angelo Juan Ramos (Flickr)• Copper: Jonathan Zander (Wikipedia)• Lead: KBD Photography (Flickr)• Mercury: Dedvedev (Wikipedia)• Salmon migrating: J Armstrong (UW)• Zinc: Raysonho (Wikipedia)• Cadmium: W Oelen (Wikipedia)• Silver: Elekes Andor (Wikipedia)• Seattle waterfront: Seattle DOT• Seattle historic Third Ave. construction: Seattle Municipal Archives