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what do rivers provide

what do rivers provide

In 1985, the number of large dams was thought to be 60,000. For those cultures that depended on them, rivers were the lifeblood. Water from some source like a spring, snow melt or a lake starts at this high point and begins to flow down to lower points. Freshwater on the land surface is a vital part of the water cycle for everyday human life. Rivers provide our communities with economic, ecological, and cultural value. Rivers can also form what is called an estuary, where salty seawater mixes with fresh water near the river mouth to form “brackish water.” The Hudson River in New York, U.S., is an example of an estuary where brackish water extends more than 241 kilometers (150 miles) upstream. From there to Cairo a 4-m-deep (12-ft) channel is maintained. Rivers come in lots of different shapes and sizes, but they all have some things in common. Rivers provide us with food, energy, recreation, transportation routes, and of course water for irrigation and for drinking. Possibly it's to do with the tranquility of a river; in countryside or in cities, the sight of water has an instantly calming effect. All rivers and streams start at some high point. Currently, 600,000-750,000 miles of our rivers lie behind an estimated 75,000 dams. Most of the water people use everyday comes from these sources of water on the land surface. Rivers also provided ancient societies with access to trade -- not only of products, but ideas, including language, writing, and technology. The high point can be a mountain, hill or other elevated area. Invertebrates. What do the Orange and Zambezi rivers provide See answer Michelleislulu is waiting for your help. All these things come to mind, instinctively or very consciously, whenever we think of rivers or spend time near them swimming, fishing, boating, or canoeing. People use rivers for transportation and as a source of natural resources. A large number of the invertebrates in river systems are insects. This is called subsistence fishing . Plants protect animals from the current and predators and provide a food source. Let's take a look at what makes rivers so amazing! Rivers: Lifelines to the World. Invertebrates have no backbone or spinal column and include crayfish, snails, limpets, clams and mussels found in rivers. River-based irrigation permitted communities to specialize and develop, even in areas lacking adequate rainfall. Most settlements were built along major rivers. The National Wild and Scenic Rivers System has only 13,413 river miles in it—less than one half of one percent of our rivers are protected through this designation. These are very rough estimates. Indigenous peoples in many parts of the world--on the Columbia, Nile, Mekong, and Amazon rivers for example--still rely on rivers to provide them with food. On the landscape, freshwater is stored in rivers, lakes, reservoirs, and creeks and streams. They play a very important part in the water cycle, acting as drainage channels for surface water. Today, our rivers are still essential to our day-to-day lives. They were our first highways, bringing explorers into the heart of the continent. Water currents provide oxygen and nutrients for plants. Rivers are useful for us in many ways - Water Rivers carry water and nutrients to areas all around the earth. Fast-flowing rivers carry pebbles, sand, and silt. The lower river, which has a relatively narrow but deep channel, is navigable for oceangoing ships upstream to Baton Rouge, La. Hippos, crocodiles, baboons, elephants, hyenas and lions are some examples of wildlife you might find along the Zambezi. What do rivers provide? Add your answer and earn points. Rizla Rizla Answer: The Zambezi River is widely used by wildlife and humans alike. People also harvest fish, shellfish, mollusks, ducks and other food animals from rivers. For example, people draw water from rivers to fulfill their drinking, bathing, irrigation, cooking and industrial needs. When dams are built, these subsistence fisheries are often flooded out, forcing people to move away and find other work.

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