EntityQ339230· pop 5· linked from 38 articleskolkSign in to savelake formed by an underwater vortex when rapid water flow passes an underwater obstacle in boundary areas of high shearConnectionsWashingtonEntityMontanaEntitytornadoEntityInternational Standard Book NumberEntityPortlandEntityEmdenEntityLake OswegoEntityvortexEntityClark ForkEntityChristmas flood of 1717EntityDry FallsEntityChanneled ScablandsEntityColumbia River GorgeEntityMissoula FloodsEntityFebruary flood of 1825EntityriprapEntityHydrodynamic scourEntityWallula GapEntityColumbia BasinEntityTualatin RiverEntityCategoriesGeomorphologyHydrodynamicsOceanographyVortices