Moisture in tree. Soils and soil moisture. Rivers, permanent lakes, springs and ponds are wet but not wetlands . Saturated, reduced oxygen, low pH, high organic matter soils at the surface. Sometimes are sands or muds with low organic matter content.
Quick sand is included.
Loss rate has declined and some wetlands have been restored or even created. Wetlands are recognized as a resource not something to be dreaded or drained. National Wetlands Inventory program in National Biological Survey to map wetlands. Source of controversy. Do botanical study to determine presence of facultative and obligate hydrophilic wetland plants.