Science / Tides and Currents / Tidelands: The zone between the mean high-water and mean low water lines. It is identical with intertidal zone (technical definition) when the type of tide is semidiurnal or diurnal.
Business / Agriculture / Uplands: Land at higher elevations than the alluvial plain or low stream terrace: all lands outside the riparian-wetland and aquatic zones. Used often in discussion of federal land management practices. MORE
Science / Tides and Currents / Submerged Lands: Lands covered by water at any stage of the tide. See tidelands. MORE