The River Forest of Congaree National Park

Congaree National Park is in South Carolina in the United States. One river shapes most of this park. About 80 percent of the land is a floodplain. A floodplain is low, flat land next to a river. Water from the river can cover this land. The park still has a large old forest on this wet land. The trees there grew for a long time without being cut.

A picture from space shows a brown river in dark green forest. The ground is soft and almost flat, so the river makes wide bends. Water moves faster on the outside of each bend. It wears away the bank there. Slower water on the inside drops sand and builds new land. Over time, a bend can leave the river. Then it becomes a U-shaped lake. Old river paths sit at different heights. They do not flood at the same time. Because of this, different plants grow in different places.

In the 1880s, companies tried to cut trees along the river. High water, wet roads, and many mosquitoes made the work hard. As a result, much of the forest was never cut. This kind of old forest became rare in the area. The land became a national monument in 1976. It became a national park in 2003. The river leaves its path several times each year. Floods happen most often in winter and early spring. They also come after strong storms. Each flood leaves rich soil on the land. The soil feeds the forest and helps its very large trees.

Why can floods help the trees in this park?