The Center for Earth and Environmental Science describes that floodplains are formed as rivers erode their own banks. Floodplains are the flat lands that lie adjacent to a river; they encompass the area that floods when the river's water level rises. As the river flows, it washes material downstream. When a flood occurs, this material is resuspended in the water and added to the floodplain.
According to The Center for Earth and Environmental Science, the ground underlying floodplains is largely composed of layers of silt, sand and mud. These layers are formed by periods of flooding, during which sediment is deposited on the floodplain, according to University of North Texas. During periods of flooding, some water is also absorbed by the floodplain soils. This prevents the flood from spreading further into the surrounding lands and causing erosion. This reserved water returns to the river during periods of lower water.
Floodplains are important to the natural environment for several reasons. According to The Center for Earth and Environmental Science, they provide habitats for numerous unique species of plants and animals. They also reduce the severity of floods and their effects on human developments, filter storm water and minimize water pollution from non-point sources.Learn More
One fun fact about sand dollars is that these animals are closely related to sea urchins. In addition, the white or off-white sand dollar skeletons found on beaches are called "tests," and their five-jawed mouths are at the center of the star-shaped markings on the tests.Full Answer >
The three main causes of landform changes are erosion, deposition and weathering. Some main types of landforms are mountains, plains, plateaus, valleys and deltas. A landform like a mountain experiences gradual change through weather conditions such as rain and wind.Full Answer >
Geographic factors are circumstances associated with a physical location that affect humans living within a specific area. Behavior, health, beliefs, income and education are examples of factors that can be affected by geography.Full Answer >
According to NationalGeographic.com, bays are formed through various ways, such as plate tectonics, overflowing of the ocean to a coastline and the slicing of a glacier through a bedrock. Bays are bodies of water partially surrounded by land, and they are typically less enclosed and smaller than a gulf.Full Answer >