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Pictured is a Tsunami Impact Map. Engineers at Oregon State Unversity have completed one of the most precise evaluations yet done about the impact that a major tsunami effect would have on the Columbia River, what forces are most important in controlling the water flow and what areas must be inundated. In general, it's the tides that have more of an effect than the amount of water flow in determining the impact and the highest tides of the year have the greatest effect. Maps have been developed as a result of this research that make more precise estimates of the areas which might face tsunami-induced flooding that should help land owners and land use planners become better prepared for when such a natural disaster occurs.
Contributed by Sam Feldstone