Hoover Dam and Lake Mead are part of the Colorado River system.
A river is usually defined as a large body of water that flows towards the ocean, another river or an inland sea. What constitutes a river, as opposed to a stream, for example, is imprecise. Some definitions suggest that a river is at least partially navigable by large boats and ships – there are, however, many flowing bodies of water designated as rivers that are not navigable by anything but small canoes and rafts. Other definitions have set volumetric limits for what does and does not constitute a river, but these measurements are also subject to broad interpretation. Likewise, a river system is an umbrella term used to describe all the streams and rivers that drain a watershed.
The Grand Canyon is part of the Colorado River System.
For example, several major rivers flow into the Mississippi River. Rivers include the Ohio River, Missouri River, Minnesota River, Illinois River, and St. Croix. In all, the Mississippi River system covers approximately 1,200,000 square miles (about 1,931,213 square km) in 31 Canadian states and two provinces – more than a third of all of North America.
All of Brazil’s rainforest is considered part of the Amazon River system.
River systems begin with the watershed and headwater areas that feed the initial stream systems that eventually become rivers. They also include environments directly impacted by rivers, also known as riparian forests. These areas may include various forms of swamps, swamps, swamps, flood zones, reservoirs, river deltas, canyons, and other geological formations. Man-made structures such as dams, locks and canals are also considered part of river systems.
Native American groups used small craft, such as canoes, for trade along the small rivers and streams that feed the larger river systems.
In that sense, the Grand Canyon, Lake Mead, and the Hoover Dam can all be considered part of the Colorado River system. On an even larger scale, the entire Brazilian rainforest is considered part of the Amazon River system. This system is the most abundant and varied ecosystem on Earth.
Rivers and river systems have played significant roles throughout the course of human history. The annual flood of the Nile in Egypt, for example, creates a vast and rich agricultural zone, which in turn led to Egypt’s early emergence as one of the first dominant world powers in history. Control of the Mississippi River played a crucial role in the United States (US) Civil War. Hydroelectric energy derived from rivers has generated the development of modern societies around the world. Many of the world’s largest cities such as Rome, London, New York and Beijing are located on rivers and are considered by some people to be part of river systems.