Anticipating vulnerable place with tsunami in Oregon by calculating estimated watershed Gunwoo Rim, Nan Jin Geospatial Info & GIS in CE 202 Oregon State University Pr. Jihye Park June 2, 2016

Introduction Tsunami is a series of ocean waves which is generated by disturbances from the sea floor during shallow, undersea earthquakes.

Tsunami 1964 100 people in Alaska 11people in California 4 children in Oregon

Objective Anticipating places that is expected to be more vulnerable when tsunami comes from Pacific Ocean than other places and plotting efficient way to reduce damage by making provision before it happens

Methodology Whole process of getting probable places are separated in 5 parts. It can be based on history data of tsunami and current raster data of Oregon coastal area. Then we can put together by using ArcGIS function to get intersection place based on watershed slope. After that, we can figure out the direction where the rate of flood has tendency to go through.

Background Tsunami wave goes to direct west coast ocean of Oregon. When Tsunami wave arrives to coastline, it acts in the law of Hyugen’s principle.

Background -continue curve number is based on the area's hydrologic soil group,  land use, treatment and hydrologic condition

Procedure

Finding the nearest DEM to TEZ Buffer: 20,000ft Resampling DEM: 15*15 Reclassifying DEM( Interval 200ft)

Problem!: It doesn’t have any directional result of slope  Aspect too.  Change our plan to using DEM

Polygon to Raster(Now both of data changed to same file type

Raster Calculator: rastercalc_Alsea_TEZ * Reclass_Alsea = 1

Result - 2 Cartographic maps

Result We are trying to search soil property of our adequate place, but it too hard to find exactly the same place.  can’t use

Conclusion WaterBreak stone Blue spot will be the most adequate place for reducing tsunami power by facilitating culvert dam, waterbreak stone, enhancing soil infiltration and so on. Limitation: Large size of DEM file vs Limited storage - lasting loading time on ArcGIS  Reduce to small part, using ArcCatalog No soil property data on seabed: tsunami is originated from volcano under the seabed Culvert- Gulf of Mexico Eco dam – can reduce the environment destruction

Conclusion -continue Further plan: Searching for wider places  Get more spots! Determining the influence between soil types and flood zone which are generated by tsunami in hydrologic, hydraulic engineering, soil physics ways.

References 1964 Alaska earthquake, Wikipedia, 25 May 2016, web. Tsunami, Wikipedia, 12 May 2016, web. ODOT Hydraulics Manual, Chapter 8, page 8-17, Oregon government. ODOT Hydraulics Manual, Appendix 8 - A, page 8-17, Oregon government. Oregon Tsunami evacuation zone, West coast ocean data portal, Taylore Wille, Kaleena Hughes, Sean Pickner, OR Dept. of Geology and Mineral Industries, GIS Technician, OR Dept. of Geology and Mineral Industries, Jun 22 2015, Oregon Spatial Data Library.

Thank you!