Preliminary Results of the US NRC Collaborative Program to Assess - PowerPoint PPT Presentation

Preliminary Results of the US NRC Collaborative Program to Assess Tsunami Hazard For Nuclear Plants on the Atlantic and Gulf Coasts A.M. Kammerer, U.S. ten Brink, D.C. Twitchell, E.L. Geist, J. Chaytor, J. Locat, H.J. Lee, B.J. Buczkowski, and M. Sansoucy Dr. Annie Kammerer, P.E. 14 th WCEE Paper 15-009 1

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NRC Tsunami Research Program • NRC – funding agency – managing coordination with research partners – integrating research into other US efforts • USGS – developing source database and localized modeling for screening – Developing PTHA methodology • NOAA – global modeling 3

NRC RESEARCH Pacific Coast Atlantic Hawaii Coast Gulf Coast 4

Research Goals • Better understanding for all US coasts • Development of a source database • Integration of landslide modeling • Determination of probable maximum tsunami (PMT) hazard levels (deterministic) • Determination of 10,000 year hazard levels through PTHA (probabilistic) 5

Tsunami Sources • Near field landslides – Atlantic and Gulf continental shelves • Far field landslides – Canary Islands • Near field seismic – Caribbean seismic zone/Puerto Rico trench – Hispaniola-Puerto Rico-Lesser Antilles subduction zone • Far field seismic – West of Gibraltar (Lisbon 1755 source) 6

Existing Data • Single beam • Multibeam • Sidescan Sonar • Soil cores 7

Existing Data Single beam Multibeam 8

Slide Types 9

Types and Ages 10

Slide Source Areas 11

Types and Ages • Glaciation • Sea level • Depositional rates 12

Slide Thickness • Thickness is minimum value • Significant uncertainty 13

Existing Data 14

Tsunamigenic Landslide Potential 15

Future Study Area Thick recent deposits Narrow continental shelf Seismic sources 16

Data collection, review of current state of knowledge, interpretation of data, basic modeling 17

Additional interpretation of data, basic modeling (also published in Marine Geology special publication) annie.kammerer@nrc.gov 18

Currituck Landslide 19

Currituck Landslide 20

Currituck Landslide Two head scarps: but Multibeam one event or two? 21

Currituck Landslide Modeling Details Bottom Friction 22

Currituck Landslide -40 -20 0 20 40 Meters 0 100 200 300 KM 23

1755 Lisbon Quake 24

1755 Lisbon Quake 25

1755 Lisbon Quake 26

1755 Lisbon Quake 27

Questions 28