submergence marsh The lower zone of a salt marsh, from the mean high-water level of neap tides to the general level of mean high water. Typically, this zone experiences more than 360 submergences per annum, usually with more than one hour of submergence during daylight each day. Continuous exposure never exceeds nine days. Compare emergence marsh.

submergence marsh The lower zone of a salt marsh, from the mean highwater level of neap tides to the general level of mean high water. Typically, this zone experiences more than 360 submergences per annum, usually with more than 1 hour of submergence during daylight each day. Continuous exposure never exceeds 9 days. Compare EMERGENCE MARSH.