SEA LEVEL RISE, THE COASTAL Community meeting COMMISSION, AND - PowerPoint PPT Presentation

Sunset Beach SEA LEVEL RISE, THE COASTAL Community meeting COMMISSION, AND LOCAL ADAPTATION 6/4/2019 PLANNING Cardiff State Beach | King Tide, Nov. 25, 2015 Carey Batha Climate Change Specialist Photo Credit: Gabe Buhr

OUTLINE 1. Climate change and sea level rise (SLR) 2. Coastal Commission, the Coastal Act, and SLR 3. How local plans can address SLR 4. What’s going on statewide to address SLR?

CAUSES OF GLOBAL CLIMATE CHANGE  Enhancement of greenhouse effect  Carbon dioxide, methane, and nitrous oxide  Primarily due to burning of fossil fuels, land use changes  Feedback processes

OBSERVED TEMPERATURE INCREASE

CAUSES OF SEA LEVEL RISE Melting of Thermal land ice expansion 5

? OBSERVED SEA LEVEL RISE

SLR PROJECTIONS Source: Moffat & Nichol

PHYSICAL IMPACTS OF SEA LEVEL RISE  Inundation – increased extent of permanently wet areas  Erosion – increased erosion of bluffs, dunes, and beaches  Flooding – increased extent storm floods (temporarily wet)  Saltwater intrusion – invasion of saltwater into freshwater aquifers

FLOODING Video: Aaron Eudaley

“SUNNY DAY” FLOODING Sunset Beach, CA California King Tides Initiative

EROSION Credit: Duncan Sinfield/YouTube

NARROWING BEACHES

BOLSA CHICA STATE BEACH INLET, HUNTINGTON BEACH 12/23/2018

WHAT’S AT STAKE  Heberger 2009  $40 billion coastal and ocean economy (NOEP 2010)  100-year coastal flood with 4.6 ft of sea level rise:  41 square miles of coastal land  7 wastewater treatment plants  14 power plants  250 miles of highways, including Highway 1  1500 miles of roads  110 miles of railways  550 square miles of critical coastal wetlands  Costs of inaction are 4 to 10 could be times greater than the costs of proactive adaptation/mitigation (Moser et al. 2014)

AGENCY MISSION Protecting and enhancing California’s coast and ocean for present and future generations

BACKGROUND COASTAL ACT POLICIES 16

BACKGROUND COASTAL ACT POLICIES  Protection of:  30210: Public Access  30230: Marine Resources Biological productivity, water quality  Limitation on fill; oil spill prevention   30240, 30241: Land Resources  Environmentally sensitive habitat areas  Prime agricultural land 30213, 30220-30222: Water-Oriented Rec. Uses   Coastal areas suited for recreation, facilities and accommodations 30244: Archaeological & Paleontological   30251: Scenic and Visual Qualities

BACKGROUND COASTAL ACT POLICIES  Section 30235: Shoreline Protection allowed for…  Coastal dependent uses  Public beaches  Existing structures  … In danger from erosion  With MITIGATION for:  Loss of beach and sand  Other unavoidable impacts (e.g., to public access, recreational opportunities)

BACKGROUND COASTAL ACT POLICIES  Section 30253: New Development shall…  Minimize risks to life & property  Assure stability & structural integrity  Neither create nor contribute to erosion  Assure no protective devices needed that would substantially alter natural landforms along bluffs and cliff

BACKGROUND CALIFORNIA COASTAL COMMISSION Public COASTAL DEVELOPMENT Resources PERMITS Code Division 20 Califor ifornia ia LOCAL COASTAL Coastal tal Act PROGRAMS (1976) (LCPs) PARTNERSHIPS & WORK GROUPS

COASTAL COMMISSION GUIDANCE Coming soon…. Local Coastal Program Adaptation Guidance for criti itica cal in infrast stru ruct cture re Public Review Draft Adopted 2015 In development Updated 2018

SLR POLICY GUIDANCE PLANNING STEPS Vulnerability assessment - Planning horizons - Hazards types - Coastal Act resources Adaptation planning - Coastal Act resources - LCP policies/ordinances - Project alternatives

HUNTINGTON BEACH VULNERABILITY ASSESSMENT (2014)

COASTAL COMMISSION GUIDANCE Coming soon…. Local Coastal Program Adaptation Guidance for criti itica cal in infrast stru ruct cture re Public Review Draft Adopted 2015 In development Updated 2018

ADAPTATION OPTIONS: BEACH NOURISHMENT

ADAPTATION OPTIONS: SEND RETENTION WITH GROINS & BREAKWATERS Photo: California Coastal Records Photo: Carey Batha Project

ADAPTATION OPTIONS: RELOCATION

ADAPTATION OPTIONS: SETBACKS Photo: California Coastal Records Project

ADAPTATION OPTIONS: HABITAT RESTORATION Ocean Beach Master Plan and the San Francisco LCP Amendment

ADAPTATION OPTIONS: ARMORING

LOCAL GOVERNMENT PARTNERSHIP 5 grant rounds have awarded… …~$6.8 million for… …50 projects to… …37 jurisdictions

THANK YOU! coastal.ca.gov/climate/slr Carey.Batha@coastal.ca.gov