These areas may already have wetland plants, such as smartweed and sedges. If the site holds water for two or three months, there is a goodchance it is already being used and shouldn't be disturbed. Areas on flood plains are especially attractive because they fill up during floods. A small pool can be constructed in less than a day using a small bulldozer or a tractor and blade. A depth of 1-2 feet is ideal, and the pool should have sloping sides.
Pools can be of almost any size or shape, depending on the site.
Trees around the site should be left in place. Once the pool is constructed, there is usually no need to introduce aquatic plants or animals. The soil in a seasonally wet area will frequently have a seed bank of wetland plants, and animals are good at finding wetlands on their own. If plants are introduced, care should be taken not to use aggressive species, such as cattails or purple loosestrife. If done correctly, your pool will dry up during the hottest part of the summer and fill up again in the fall or spring, just in time for the next breeding season.