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Code Table List


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National Wetlands Inventory Modifier Codes

 CodeDescription
 EDIT Temporarily FloodedSurface water is present for brief periods during the growing season, but the water table usually lies well below the soil surface for most of the season. Plants that grow both in uplands and wetlands are characteristic of the temporarily flooded regime.
 EDIT SaturatedThe substrate is saturated to the surface for extended periods during the growing season, but surface water is seldom present.
 EDIT Seasonally FloodedSurface water is present for extended periods especially early in the growing season, but is absent by the end of the season in most years. When surface water is absent, the water table is often near the land surface.
 EDIT Seasonal/well-drained 
 EDIT Seasonal/saturatedDuring a seasonal period, the ground is incapable of holding more water.
 EDIT Semipermanently FloodedSurface water persists throughout the growing season in most years. When surface water is absent, the water table is usually at or very near the land surface.
 EDIT Intermittently ExposedSurface water is present throughout the year except in years of extreme drought.
 EDIT Permanently FloodedWater covers the land surface throughout the year in all years. Vegetation is composed of obligate hydrophytes.
 EDIT Intermittently FloodedThe substrate is usually exposed, but surface water is present for variable periods without detectable seasonal periodicity.
 EDIT Artificially FloodedThe amount and duration of flooding is controlled by means of pumps or siphons in combination with dikes or dams. The vegetation growing on these areas cannot be considered a reliable indicator of water regime.
 EDIT Unknown 
 EDIT Intermittently Flooded/Temporary 
 EDIT Saturated/Semipermanent/Seasonal 
 EDIT Intermittently Exposed/Permanent 


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