Identifying non-tidal wetlandsNon-tidal wetlands are freshwater, found around inland areas, and do not have tidal influxes of water. They are fed by rain, snow, or groundwater, and are usually covered with water during the winter and spring months and are often dry on the surface during the summer or fall months. The changing water levels can make these wetlands hard to identify. Non-tidal wetland vulnerabilityFreshwater wetlands make up 75% of all Delaware wetlands. Most of these are of the forested non-tidal variety. They come in all different shapes, sizes, and types, such as flats, depressions, riverine, swamps, and fens. These wetlands are assessed through watershed report cards, but only non-tidal wetlands of 400 acres or more are regulated by the state, which can leave certain wetlands unprotected. However, you may still need to get a federal permit from the U.S. Army Corps of Engineers or check into your county's buffer and wetlands ordinances when filling or building on wetlands. Select any of the tiles below to learn more about each specific type of non-tidal wetland. Page reviewed 5/14/19