Frank’s Dump West - New Year’s Eve 20058.9 ft tides; 40mph westerly winds Photo: Mark Taylor

Inundation

Erosion

Hayward Marsh - New Year’s Eve 20058.9 ft tides; 40mph westerly winds Photo: Mark Taylor

Functions

Urban Habitat Storm drainage Land fill Wastewater Utility corridors Trails

Preliminary diagram: Carollo, EBDA 2011

Functions

Urban Habitat Storm drainage Land fill Sewage treatment Utility corridors Trails

PGE

EBDA line

Railroad

Cable

HP Gas

Bay trail

Hold the Line

Realign

Rapid landward movement increases as sea level rises

Opportunities

Examples of remnant native lowland (alluvial) grassland and sedge-rush meadow stands in lowlands bordering the Bay.

Upland Ecotone

Rapid landward movement increases as sea level rises

Mudflat Tidal Marsh Brackish MarshFreshwater

Swale

Treated Wastewater and Stormwater

Seepage

Overflow

Wave Attenuation

Upland Ecotone

::: Hargreaves Associates :::

16

2011

2047

Main Breaches

Break up levee

High marsh/transitional habitat/buffer

17

Demonstration Project to measure wave attenuation over a

tidal marsh and mudflat.

Rapid landward movement increases as sea level rises

Mudflat Tidal Marsh Brackish MarshFreshwater

Swale

Seepage

Overflow

Wave Attenuation

Demonstration Project to create historic transitional

habitat; to create buffers to sea level rise; to polish discharge by subsurface

seepage.

Rapid landward movement increases as sea level rises

Mudflat Tidal Marsh Brackish MarshFreshwater

Swale

Seepage

Overflow

Wave Attenuation

0ft 1ft 2ft 3ft 4ft

Existing levees

Terraced leveesTerraced brackish levee

Enhance existing wetlands, realign levees

Lead Time Effective

Realign functionsRealign functions

Threshold

5ft

Decision

An Adaptation Strategy?

Functions

Urban Habitat Storm drainage Land fill Sewage treatment Utility corridors Trails

PGE

EBDA line

Railroad

Cable

HP Gas

Bay trail

Questions?