Soils that are frequently ponded for long duration or very long duration during the growing season, or 4. Soils that are frequently flooded for long duration or very long duration during the growing season. Hydrology indicators Wetland hydrology refers to the presence of water at or above the soil surface for a sufficient period of the year to significantly influence the plant types and soils that occur in the area. A single automated quaging station may tell you how often a given point is submerged, but does little to delineate the boundaries of that wetland. Soil is waterlogged during the growing season.
Water marks are present on trees or other objects.
Such marks indicate that water periodically covers the area to the depth shown on the objects. Drift lines, which are small piles of debris oriented in the direction of water movement through an area, are present. These often occur along contours and represent the approximate extent of flooding in an area. Debris is lodged in trees or piled against other object by water. Thin layers of sediments are deposited on leaves or other objects.