Starting a New Small Tributaries Loads Study WY 2007: Zone 4 Line A - Progress to-date Lester McKee...

Starting a New Small Starting a New Small Tributaries Loads StudyTributaries Loads Study

WY 2007:WY 2007:Zone 4 Line A - Progress to-dateZone 4 Line A - Progress to-date

Lester McKee and Rand EadsLester McKee and Rand Eads

Sources Pathways and Loadings WorkgroupSources Pathways and Loadings Workgroup

November 13November 13thth 2006 2006San Francisco Estuary Institute

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SpatialSpatial scales for monitoring scales for monitoring anthropogenic influence on the anthropogenic influence on the

earth systemearth system ““spatial libra pro monitoring anthropogenic spatial libra pro monitoring anthropogenic

duco in orbis terrarum ratio”duco in orbis terrarum ratio” Water and sediment production per unit area varies by Water and sediment production per unit area varies by

orders of magnitude between watersheds of different sizesorders of magnitude between watersheds of different sizes

Large ≈ less steep ≈ lower drainage density ≈ greater storageLarge ≈ less steep ≈ lower drainage density ≈ greater storage Small ≈ high hillslope and stream gradient ≈ high drainage Small ≈ high hillslope and stream gradient ≈ high drainage

density ≈ less storage density ≈ less storage

Our studies cover the 4 main scales:Our studies cover the 4 main scales:

Large Rivers (Sacramento/ San Joaquin Rivers = 154,000 kmLarge Rivers (Sacramento/ San Joaquin Rivers = 154,000 km22)) Small Tributaries (10s kmSmall Tributaries (10s km2 2 - 1,660 km - 1,660 km22)) Sub-watersheds / Storm drain outfalls (10s ha – few kmSub-watersheds / Storm drain outfalls (10s ha – few km22)) Urban BMPs (<1 – 10s ha)Urban BMPs (<1 – 10s ha)

San Francisco Estuary Institute

RegionalWatershedSewershed

Contaminants are in Close Contaminants are in Close Proximity to Drainage LinesProximity to Drainage Lines


Coyote (Historic)

Coyote (Modern)

Ettie Street PS Sewershed

Selection of a new location Selection of a new location to studyto study

San Lorenzo Creek at San San Lorenzo Creek at San Lorenzo (Zone 2 Line B) Lorenzo (Zone 2 Line B)

Estudillo Canal Estudillo Canal

Colma Creek at South San Colma Creek at South San Francisco Francisco

Zone 4 Line A Zone 4 Line A

Castro Valley Creek at Castro Valley Creek at Hayward Hayward

Laurel Creek at Hillsdale Laurel Creek at Hillsdale

Wildcat Creek at Vale Wildcat Creek at Vale Road Road

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Zone 4 Line A - HaywardZone 4 Line A - Hayward

4 km4 km22

25% industrial25% industrial 25% commercial25% commercial 50% residential50% residential No upland clean sedimentNo upland clean sediment

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What does no upland What does no upland sediment supply mean?sediment supply mean?

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A

Time of Concentration in Time of Concentration in Bay Area WatershedsBay Area Watersheds


0.1

1

10

100

0.01 0.1 1 10 100 1000 10000

Watershed area (Sq. km)

Res

pons

e ti

me

(hrs

)

(40 acres)

Guadalupe R.(8-10 hrs)

Zone 4 Line A(1.5 hrs)

(4 acres)

City Block(12 min)

(Ref: McKee et al., 2003)

Progress to-dateProgress to-dateItem #6


Technical Review Committee approved the study Technical Review Committee approved the study June 27th, 2006 and subsequently approved by June 27th, 2006 and subsequently approved by the Steering Committeethe Steering Committee

McKee and Eads completed reconnaissance McKee and Eads completed reconnaissance August 23August 23rdrd, 2006, 2006

Encroachment permit issued by Alameda County Encroachment permit issued by Alameda County (assistance from Arleen Feng)(assistance from Arleen Feng)

Equipment purchase and prefabrication Equipment purchase and prefabrication completed Friday November 3completed Friday November 3rdrd, 2006!, 2006!

Location and EquipmentLocation and EquipmentItem #6




DTS 12 Turbidity probe



ISCO pumping sampler

Campbell DataLogger

Bring on the wet season!Bring on the wet season!

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Starting a New Small Tributaries Loads Study WY 2007: Zone 4 Line A - Progress to-date Lester McKee...

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