An oxbow lake forms when a curve, or meander, in a river pinches shut. The river follows a new, shorter course and a lake forms beside the river.Know More
Oxbow lakes form when a river has two curves, one bending away from the straight course and another bending back. The banks of the curves closest to one another - the concave banks - are prone to erosion from the force of water flowing against them. Over time, this erosion causes the curves to pinch together. The river now flows along a shorter, straighter course and an oxbow lake sits beside the river. Oxbow lakes form most often near the river's confluence with a larger body of water and on low-lying plains.
Oxbows are stillwater lakes, meaning there is no inflow or outflow of water. Since no streams feed the lake and no water leaves, oxbows often become marshes or bogs and can even dry up entirely if water evaporates. Former oxbow lakes are excellent agricultural land. Both as lakes and as bogs, oxbows provide rich habitat for wildlife. Oxbows can also be formed due to human intervention. Engineers shortening the Mississippi River formed many oxbows lakes that later evaporated, creating fertile land for farming.Learn More
The River Nile drains into the Mediterranean Sea. It is the longest river on the African continent and in the world.Full Answer >
The ocean covers 321,003,271 cubic miles, or 70 percent of the Earth's surface, according to the National Oceanic and Atmosphere Administration. A cubic mile is the volume of a cube that measures 1 mile on each side. The ocean makes up 96 percent of the Earth's water.Full Answer >
Scientists have not agreed on the technical, formal differences between a pond and a lake, though in practice, a pond is not as deep or large as a lake. Whether a body of water is called a pond or lake usually depends on local conventions.Full Answer >
Water comes from three main natural sources: rain water, underground water and surface water. Rain water includes rain, snow and other forms of precipitation. Underground includes water tables and water hidden in the soil. Surface water includes oceans, rivers, lakes, ponds and any other above-ground collection of water.Full Answer >