Humboldt Bay Vertical Reference System Working Group (HumBayVert) Humboldt Bay Initiative Meeting: June Cascadia GeoSciences, Northern Hydrology, HSU Geology, U of O Geology, & HBI members
Background Partnerships Partnerships Issues Issues Goal Goal Funded by NPLCC Funded by NPLCCUpdate 2013 Annual Report 2013 Annual Report Trinidad Tide Gage Installation Trinidad Tide Gage Installation SLR Calculations SLR Calculations Next Step Predictive Model Predictive Model Tectonic Modeling Tectonic Modeling Need Funding Need Funding
Partnerships Cascadia GeoSciences Humboldt Bay Initiative “Our vision is a vibrant, thriving, and resilient Humboldt Bay Ecosystem that supports the well- being of our human and natural communities.” North Pacific Landscape Conservation Cooperative Dept. of Interior Climate Change Adaptation Program Adaptation Program
Issue: tectonics controls Local Sea Level Accurate measurement of local land elevation in the Humboldt Bay area Accurate measurement of local land elevation in the Humboldt Bay area Priority issue identified by USACE, Coastal Commission, NOAA NGS & others
We live and work here!
Atwater & Satake, 2009 Interseismic between earthquakes Coseismic during earthquake Subduction Zone Earthquake Cycle and Vertical Land Level Changes:
Compare Rates & Test Observations Compare to tide gage observations Compare to GPS and land level surveys Compare to long term ESLR
Historic Temporary Tide Gage Locations Humboldt Bay Mad River Slough North Spit Hookton Slough Samoa Fields Landing
North Pacific Landscape Conservation Cooperative funded this research project through the USFWS, Award F11AC01092
Trinidad Tide Gage We are purchasing equipment that will be installed and maintained by CenCOOS We are purchasing equipment that will be installed and maintained by CenCOOS Equipment will be installed in July 2014 Equipment will be installed in July 2014 Level Survey will be completed in July 2014 Level Survey will be completed in July 2014
Historic Benchmark Surveys ( ) Reed Burgette, 2012; Univ. of Oregon Historic Benchmark Surveys ( ) Reed Burgette, 2012; Univ. of Oregon
Draft Humboldt Bay Vertical Land Motion Estimates SLR and VLM Rates (mm/yr) Tide Station (TS)NoteDatumReSLRRSLRTS-CCVLM Crescent City (CC) Long Term Tide Station with Mean Monthly Seasonal Cycle Removed STND North Spit (NS) Reference Humboldt Bay Tide Station with Mean Monthly Seasonal Cycle Removed STND Mad River Slough (MRS) Minor Tide StationNAVD Somoa (SO)Minor Tide StationSTND Fields Landing (FL)Minor Tide StationSTND Hookton Slough (HS)Minor Tide StationSTND ReSLR = regional sea level rise rate RSLR = relative sea level rise rate SLR = sea level rise rate VLM = vertical land motion Jeff Anderson
Next Step Tectonic Modeling Tectonic Modeling Fit tectonic model to tide gage and BM data Fit tectonic model to tide gage and BM data Prepare Predictive Model Prepare Predictive Model Project Proposal is Written (but not funded yet) Project Proposal is Written (but not funded yet)
KrigingIDW
Mission and Goals Determine historic land and sea level trends Determine historic land and sea level trends Map local sea level change across region Map local sea level change across region Complete historic analysis of tide and level data in PNW Complete historic analysis of tide and level data in PNW Model geologic processes controlling uplift/subsidence Model geologic processes controlling uplift/subsidence Compare historic trends to prehistoric geologic record Compare historic trends to prehistoric geologic record Data dissemination for regional workers Data dissemination for regional workers Mission and Goals Determine historic land and sea level trends Determine historic land and sea level trends Map local sea level change across region Map local sea level change across region Complete historic analysis of tide and level data in PNW Complete historic analysis of tide and level data in PNW Model geologic processes controlling uplift/subsidence Model geologic processes controlling uplift/subsidence Compare historic trends to prehistoric geologic record Compare historic trends to prehistoric geologic record Data dissemination for regional workers Data dissemination for regional workers Methods Re-occupy historic tide gage locations Re-occupy historic tide gage locations Install regional tide gage stations Install regional tide gage stations Collect and analyze historic GPS & level data WRT mean sea level Collect and analyze historic GPS & level data WRT mean sea level Model Cascadia subduction zone with new data Model Cascadia subduction zone with new data Partnerships & collaboration Partnerships & collaborationMethods Re-occupy historic tide gage locations Re-occupy historic tide gage locations Install regional tide gage stations Install regional tide gage stations Collect and analyze historic GPS & level data WRT mean sea level Collect and analyze historic GPS & level data WRT mean sea level Model Cascadia subduction zone with new data Model Cascadia subduction zone with new data Partnerships & collaboration Partnerships & collaboration
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Jeff Anderson