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HomeMy WebLinkAboutCD Sea Level Rise White Paper PPTWhite Paper Climate Adaptation -Sea Level Rise City Council Meeting- February 3., 2014 climate Change Action Plan CCAP adopted 2009 Recognizes need to plan for predicted sea level rise Presents implementing measures including levee analysis, sea level monitoring and preparation of vulnerability assessment "White Paper"" "First Step" in responding to CCAP recommendations Informational document Not a technical report or study ''urpose L.� Identifies key agencies & roles Q Summarizes current information and studies Q Identifies potential funding sources L F Presents efforts in Marin and North Bay D Describes adaptation tools/techniques developed and tested Li Presents San Rafael levees & shorelines + potential opportunity areas adaptation I F Summarizes challenges ED Presents suggested 99next steps" Agencies Addressing Sea Level Rise BCDC published sea level rise predictions in 2007 Water levels in SF Bay predicted to rise 16 -inches by 2050 and 55 -inches by 2100 San Rafael would beimpacted Di:4CLAWER- The rwxWvn costa used w wesa maps do not s+cDwm kr sborskna otron or wave sc-Ovny. mew maps sue fir iYlk maUon% t purposes Wy. Vs-erra agre a to dam ihanvAes& and Wamslass the � of �:aUfomra and iYa mpesantat�Ves sum �Ys°&gents fbrany ab�5tcyssaxfiate wdt�h hha arse ofthe mapps The maps and =a -shag neat be used to assess setuar waatar tigzarda_irisum -s mgAremerim, or rP1 vawe-s or be used in Neu of Flood fnmrwx—s Ra[e Maps issued by tris Fade ra? fmargenoy Management Agency (FF ). r r 4 - Agencies Addressing Sea Level Rise Regional agency collaboration through Plan Bay Area Joint Policy Committee formed Mission = develop tools for conducting vulnerability assessments, adaptation measures and funding Agencies Addressing lea Leve� Rise Ll FEMA- FIRM map updates; ➢ New regs requiring higher finished floor elevations for structures County level- Marin Watershed Program 1 North Bay Watershed Assn C"--- Rafael Efforts to Date CCAP Station Area Plans San Rafael Creek/Canal dredging GIS -Map Guide = map FEMA flood zones, but not yet accessible to public SIS MapGuide A VFN—U— co Lj, AVEPLAO, "P S ION AVF-V VE '0 svi I 34IF, T LA' -"NAM ST q iQNfTE ST o' ITIMP EFC,A-, "'OPET 8�Cvl" 04' 14 STREET P S fREFT PRANc,_�S S 21- & \E w SECO T 0., --FOR, BERT '3AVV-F j AVENUE OCTAVIA0 ST ';t It S,'N ------ - ------ RAFA I dies/Developments Bay Area "ART Project' sponsored by BCDC, MTC, Caltrans Assessment of Alameda Co shoreline "Template" for pilot projects and preparation of vulnerability assessments Strategies/Tools Fir Adaptation Raising levees Barriers (sea walls, gates "Retreat- levee r moving levees relocation inland, eclaiming diked baylands) "Horizontal levee" (conversion of mudflats to marsh) Retreat- Levee Relocation Abandon Restored wetland A bayshore wave attenuation levee 4smaller wave runup Build levee inland LA SF Bay •,,,� Bay Mudflatt Horizontal Levee Tidal Marsh Seepage Berm r rt Brackish Marsh Impermeable l Berm or Wall Freshwater Swale Cut off wall Curren 'Karin Project- F1 Richardson Bay Pilot Program - testing engineered shorelines Southern Marin Vulnerability Assessment Pilot Program i I "C -SMART" - Marin coastline i 1 Gallinas Watershed Program � i BCDC PDA Pilot Project 'Fund'ing Sources Sources and grants available for study and adaptation Critical prerequisite = need for a current, adopted Multi - Hazard Mitigation Plan I an Rafael's Levees & Shorelines General review of three areas: Inner Canal & East San Rafael Shoreline San Pedro Peninsula (Loch Lomond to Peacock Gap) Gallinas Creek Basin Inner Canal D a ■ IF a Ah 9 ar r i ,,••)'� '. I• M `soya _ 1IL. f t- Mooring Road r Summit Ave Marina Vista East an Rafael Shoreline Ab a ye— 4w-- 1 a■■re a •Ir:41111:Aq":4m1K � San Pedro Peninsula a a Ah jeacc Gall'inas Creek Basin a I it■���rlrl,±\t ■ ore PARKING' ONLY _ r,.' Z.r� •tip ..- � .... 'K `„ ��� * '�d., c ;.y :cru■are u10i• :4111010 A a Possible Opportunity Areas to Study Public & Private Lands: L]Raise/Improve levees LIBarriers/sea walls LI Retreat — ❑Horizontal levee Mahon Creek eat 7 M -- Q 10-7, 7 I � l i LZ7V7AI r'■•Aft Ar am 0MEN &V .. t. a10F. r Pickleweed Park Diked Baylands a00go0■IAIKO l• i l .two?,r.� i �� € A7*4 i"IlA"�: I 1rf L f • Pk I lk,Fol FrAwk ISO, -3 ft •I• Examples- Private Improvements L1 c` - z ` . P f fi'.Y'k1 Xl �J sda/d fi 4e 4V Y� _ �. ��J}yP •t NAM n i w � e c Q s 9 C l s- Challenges Cannot " piecemeal" Multi -Agency effort Substantial # of stakeholders No " one -size -fits -all" approach City resources/funding limited Adaptation strategies require trade-offs Adaptation strategies = costly Suggested Next Steps Prioritize prep of vulnerability assessment Determine DPW resources to pursue next steps ❑ Investigate/pursue funding sources ❑ Engage in Countywide/Region efforts ❑ Identify stakeholders + initiate outreach ❑ Complete tasks to stay current and eligible for funding opps 1 o Commit to long-term implementation 1 Questions