val·ley. (văl′ē) A long, narrow region of low land between ranges of mountains, hills, or other high areas, often having a river or stream running along the bottom. Valleys are most commonly formed through the erosion of land by rivers or glaciers. 10 million years ago. A boat with many oars was a common scene in Predynastic art, but scenes involving hunting or vegetation along the Nile were depicted in art across many periods. The topography and the climate of the valley through which the Jordan River flows have played a decisive role in the region’s settlement and political importance. How do rivers erode? The river, which began then as it begins now, in British Columbia, followed, finding its way to the ocean through what is now the Columbia River Gorge of the Cascade Mountains. 2. SHORT DESCRIPTION. Natural levees are located throughout the area. As water flows around these curves, the outer edge of water is moving faster than the inner. Generally defined as the area between the Ozark and Ouachita Mountains , [1] the River Valley is characterized by flat lowlands covered in fertile farmland and lakes periodically interrupted by high peaks. Archaeological sites dating to northwest India’s Neolithic period and the Indus Valley Civilization | Agricultural village societies first emerged to the west of the Indus and then spread to the Indus River and its many tributaries, as well as the Ghaggar-Hakra River (running parallel to and east of the Indus), which has since dried up. river erodes its way down through the landscape (vertical erosion) until it reaches base level (usually the sea but sometimes an inland lake). 1. The Merced River wound its way through a shallow indentation in the valley, the genesis of what would eventually shape the valley path. a narrow valley with steeply sloped sides that appear similar to the letter "V" from a cross-section. The deepest part of the channel is on the outside of each bend. A river knows better—:it has to do with how it dissipates the energy of its flow most efficiently; and how, in its bends, the sediment deposited soon turns into marshes and swampy islands, harboring all manner of interesting life, imparting charm and character to the whole waterway. Pot Holes: The kettle-like small depressions in the rocky beds of the river valleys are called potholes … Rejuvenation. The Hudson River valley played an important role during the French and Indian war in 1750s and the American Revolutionary war. The topography of the area is dominated by (a) a series of parallel, narrow, elongate ridges and intervening valleys that run N60E - S60W across the entire width of the central one-third of the region; and (b) the Susquehanna River, a mile-wide stream that flows in a curving path from the northern to the southern boundary of the map, cutting right across the mountains. The river gains energy as it flows down the slope (or gradient) from its headwaters to sea level which can vary depending on the landscape and the river. The triangle shaped lake is basically an oxbow lake and it results from the fact that the river used to flow through a meander but the river has now cut through the narrow meander on the north section thus changing the river into an oxbow lake. Small streams meet and join together, growing larger and larger until the flow can be called a river. Describe the change in the landscape as a river erodes its valley over thousands of years? They had realised, on leaving the ocean-going ship that landed them at St. Michael's Island (near the mouth of the great river), that they could not hope to reach Dawson that year. Describe the river valleys of Asia. Geologists classify streams along with rivers and view their development as a flowing body of water progressing along the same three stages. The movement of rivers, the processes of weathering and erosion, and tectonic activity create canyons. Indus-Sarasvati Civilization. The White Nile flows from Lake Victoria, Lake Edward and Lake George, and the Blue Nile originates in the Ethiopian mountains. Reply. Introduction. The most famous of these waterfalls is located on the border between Argentina and Brazil. A stream or river that feeds into a larger watercourse. This form of erosion cuts down towards the river bed and carves out steep-sided V-shaped valleys. Other methods such as horses and camels, only appeared in later times, the later being introduced by the Persians when they occupied Egypt. Old Age River: The classic song, "Old Man River", was certainly written about an Old Age River. A meander, in general, is a bend in a sinuous watercourse or river. The valleys are some examples of broad V-shaped valleys. Fact 12: River valleys have been of great importance since the ancient period. River valleys such as the Yellow River, Nile, Ganges, Indus, and Tigris-Euphrates originated the first human society. 2. View Streams.pdf from MATH 157 at Iowa Western Community College. As the glacier moves on, the embedded rock materials scrape or abrade the rocks in its path forming steep valley walls. The international Rhine River covers a total of 1,200 km and has become a symbol of the successful transnational cooperation within the region. As the slope of the land is steeper and the velocity higher in mountain, vertical erosion or down cutting of a river far exceeds lateral erosion. The Hudson River valley is the valley of the Hudson River and its neighboring communities in New York. Winding river. ), Archaic … Approximately what percentage of the area shown on the map is stream valley similar to the lower half of Section 17) and what percentage is upland? A meander forms when moving water in a stream erodes the outer banks and widens its valley, and the inner part of the river has less energy and deposits silt. V-Shaped valley and Gorge: The valley of a river is ‘V’ shape viewed sidewise. The shape is produced by the joint action of vertical erosion or down cutting and side wash or lateral erosion. The down cutting of the river deepens the valley whereas the side wash make the valley sloping upward away from the river. The course a river takes is split into three stages, the upper, middle and lower stage. As the channel and valley deepens the sides of the valley are exposed and become susceptible to weathering. An elongated lowland between ranges of mountains, hills, or other uplands, often having a river or stream running along the bottom. OHIO VALLEY. In the upper stage, the river is close to its source and high above its base level (the lowest point the river can erode to 1).In the lower stage the river is far away from its source, close to the mouth and not far above its base level. River landscapes. The length of the Nile River is approximately 6,850 kilometers. Its biggest tributary is the Wei River which flows past Xi'an. You can tell because the cliffs to the west have upward tilting strata that dip away from the center of the valley… Stream valley Upland: 6. River landscapes. U. Upstream. The quantitative analysis of river networks has a long history (e.g. A valley is a type of landform.A valley is a lower part in the land, between two higher parts which might be hills or mountains.Valleys often start as a downward fold between two upward folds in the surface of the Earth, and sometimes as a rift valley.A valley is made deeper by a stream of water or a river as it flows from the high land to the lower land, and into a lake or sea. Channel shape: this is the shape of a cross section through the river channel itself. The valley walls wear down, the river creates a broad flood plain, and begins to meander, or develop wide bends. b. (6) Low sediment load so that the river may resort to active erosion etc. The region has a number of grassy hills and mountains. The shape of river valleys changes as rivers flow downstream. This political importance has left its mark in the biblical text’s historical writing, in turn influencing the theological and symbolic importance of … Egypt. The Arkansas River Valley (usually shortened to River Valley) is a region in Arkansas defined by the Arkansas River in the western part of the state. A river is characterized by continuously flowing water from an upland source into lakes, wetlands or the sea. Fluvial Features—Meandering Stream. Over thousands of years, a meandering river gradually shifts from side to side across its flood plain. This is the part of the river closest to the source. Usually, valleys contain a stream or river flowing along the valley floor. “Canyon” comes from the Spanish word cañon, which means “tube” or “pipe.”The term “gorge” is often used to mean “canyon,” but a gorge is almost always steeper and narrower than a canyon. The features found in the youthful stage of a river are all formed by the processes of Erosion. V. Valley . Valleys formed by river action typically have a concave upward profile, steep in the headwaters and gentle in the lower reaches. T he Upper Nile is divided into three tributaries: the White Nile, the Blue Nile and the Atbara River. Thanks so much for the suggestion! This makes particles in the water clump together and settle in thick layers of mud. Name _ Landscapes formed by Streams Learning Objective: Explore how a stream works Summarize stream valley types and How do rivers erode? Two types of erosion happen at different stages along a river. A River’s Course. The river is small and flows quickly. meander. Sumeria. Meanders form a snake-like pattern as the river flows across a fairly flat valley floor. As the river reaches lower ground, it will often wind its way through many towns and cities on its way towards the sea. Chinese refer to the Yellow river as " the Mother River " and "the Cradle of Chinese Civilization". https://www.thoughtco.com/rivers-from-source-to-sea-1435349 Nearly all major settlements and civilisations are located within river valleys, and for thousands of years we relied on these rivers for transport, defence, waste disposal and power. A more dissected landscape ensued as the whole range was uplifted and tilted westward. Rivers are fed by tributary streams or springs, and they include a river channel, shoreline and a floodplain. Fluvial erosion is the process by which a river wears away the land. The Indus Valley Civilization has the distinction of being one of the world’s true primary civilizations, but it is also perhaps the most enigmatic. This westward tilt accelerated the Merced River's flow and the river cut deeper into its valley. Sometimes, in cold climates with a lot of snow, like Alaska, glaciers flow all the way down to … Some valleys are formed through erosion by glacial ice. The course a river takes is split into three stages, the upper, middle and lower stage. The waters ran on and on until they joined another river which today is known as the Potomac. More than 95% of the country’s population depend on its water and live within a few miles of the river … We’re trying to pick settings that should have a wide appeal–glad this one is useful to you. Two of these were Djenne and Timbuktu. The river is usually small and flows down steep slopes with lots of energy. The Nile River often influenced the content of Egyptian art. OHIO VALLEY. The long profile and changing cross profile of a river and its valley. The down cutting of the river deepens the valley whereas the side wash make the valley sloping upward away from the river. At last, the lake was gone. That is why the cross profile of a valley assumed typical ‘V’ shape. Describe the topography in the lower half of Section 17. located three sections east of Section 14 5. There are three stages of river, 1 youthful stage 2 mature stage 3 old stage 1) youthful stage :- at this stage river is in its erosional phase , we can see deep gorge,V -shape valley , canyon, potholes. On the shores where Southbank now stands, a marshland was alive with birds, turtles, frogs and insects. Welcome to Upper Rhine Valley. Human occupation in the Ohio valley began over sixteen thousand years ago, and the region was home to a series of cultures: Paleo-Indian (before 9500 b.c.e. This is a low-lying area that often floods. The Iguazú Falls is composed of 275 individual falls strung out along the rim of a crescent-shaped cliff about 2.5 miles (4 kilometers) long. Valley longitudinal profiles. As a verb river The river’s kinetic energy (or the energy that comes from the moving of the water as it flows downhill) is what causes the majority of the erosion to the geography of the river. A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Braided river formations are common where water flow is slow and there is a build up of sediment in the river. The sophisticated town planning of Harappan civilization thrills present day’s engineers. By 2,500 BCE the Indus-Sarasvati or Harappan civilization became the largest civilization of the Ancient world, extending over more than 386,000 square miles (1 million square kilometers) across the plains of the Indus River from the Arabian Sea to the Ganges. Fact 6: The sharp bend in a river’s course, called a ‘meander’, is eventually cut off by a new channel that forms across the neck of land created by the meander. Two types of erosion happen at different stages along a river. Unlike ancient Egypt and Mesopotamia, the Indus Valley was unknown until the nineteenth century and even now it remains somewhat elusive due to its so far undeciphered script. The physical features of a river and its valley. The lower end of such a profile is adjusted to an effective lower limit of erosion defined by the baselevel. The lake in the center of the pool forms for the same reason that a lake will form on the landscape — it is the lowest area around and the water comes in, through a river, seepage into the ground, or by evaporation, faster than it can get out. This huge dam controls the flow of the river to generate electricity, irrigate (water) farms and provide homes with drinking water. Meanders are bends in a river that form as a river’s sinuosity increases. Awesome! This can occur to form a river delta, which is a form of braided river. These glaciers may remain present in valleys in high mountain or polar areas. On its way down, the water shapes the landscape by wearing away rock and carving out a network of valleys. Although donkeys were also used to transport people and goods, everyone took to the river as a means of transport. The valley’s sides also undergo mass movements resulting in large volumes of material falling into the river’s channel, adding to its erosive power and causing the valley sides to take up a … At this, Pepper gave a short, sharp bark, and, springing across the little river… These giant steps are located at the east end of the valley. Beginning about 12 million years ago, the pressure began to warp the basin into the characteristic east-west folds that are the modern-day tributary river basins. As the river reaches lower ground, it will often wind its way through many towns and cities on its way towards the sea. The river gains energy as it flows down the slope (or gradient) from its headwaters to sea level which can vary depending on the landscape and the river. Meandering river channels are asymmetrical. Examine the valley by looking down its axis (tilt your view) and determine whether the valley is in the center of a syncline or anticline. V-Shaped Valley The river will erode downwards in its youthful stage. The ability of a river to erode depends on its velocity. bend in the river… Its basin area is 752,443 km2 (290,520 mi2), containing about 200,000 km2 (77,000 mi2) of arable land and over 100 million people. Valley profile: this is the shape of the valley on either side of the river channel. Streams usually form rivers in the higher elevations of mountains and hills. 1922 Colorado River Compact appropriates 7.5 million acre-feet per year to each of the river’s two basins. River valleys; These kinds of valleys are created by the erosive activity of water running over the land. Over thousands of years, the Nile River evolved into its present shape, surrounded by the Eastern and Western deserts. This can cause changes in the direction of the river and create new channels. The Merced River forms the Vernal and Nevada Falls where great blocks of granite were first quarried and then carried away by the glaciers. The Indus-Valley Civilization had the most advanced town planning ever seen in India. Muddy banks. River valleys are usually characterized by V shape cross-sections and steep slopes. Trees in this area are strong enough to withstand floods. A valley is a type of landform which usually features as lowland between two higher landforms (which may be mountains or hills). The areas of depression between hills or mountains are known as valleys. A definite improvement on the human life cycle. The long profile and changing cross profile of a river and its valley. The measure it, we need to be able to measure the length and angle of the slopes perpendicular to the river. Types of Valleys River valleys These kinds of valleys are created by the erosive activity of water running over the land. River valleys are usually characterized by V shape cross-sections and steep slopes. River valleys are predominantly found near sources of rivers because of the availability of steeper bank. A river in the mountains or hills will usually have a deep and steep V-shaped valley as the fast moving water cuts away at the … general descriptive term for clay, silt, sand, gravel, or other unconsolidated rock and mineral fragments transported by running water and deposited as sorted or semisorted sediment on a floodplain, delta, or streambed How can you tell (support your answer)? In this respect it differs markedly from its northern neighbour, the Rhine, which leaves all of its Alpine characteristics behind when it leaves Switzerland. Something, like uplift of the land, causes the river to begin cutting downward anew. Its water ran out of the valley, through a break in the mountain side. by PyranicOfficial The Boss (172k points) The river’s kinetic energy (or the energy that comes from the moving of the water as it flows downhill) is what causes the majority of the erosion to the geography of the river. As a river flows down steep slopes, the water performs vertical erosion. The water flows more slowly in the shallow areas near the inside of each bend. Types of River Capture: . Types of Valleys. A valley is a long trough in the landscape that has been eroded by a river or a combination of river and glacier action. The ability of a river to erode depends on its velocity. The gradient is steep. The region includes red soil that is good for farming. 3. a level below which a stream cannot erode its valley What is alluvium? ocean, lake). Read more. is that river is a large and often winding stream which drains a land mass, carrying water down from higher areas to a lower point, ending at an ocean or in an inland sea or river can be one who rives or splits while valley is an elongated depression between hills or mountains, often with a river flowing through it. At this point, an ‘oxbow lake’ is said to be formed. Each city had its own god also in the center of each city-state was a ziggurat a place where that city-state’s god could be worshipped. 1923 Hetch Hetchy Valley flooded to produce water supply for San Francisco despite years of protest by John Muir and other conservationists. The valley becomes youthful in appearance, but retains old-age features, like meanders. A glacier discharges snow from its accumulation area in the same way a stream discharges water from its watershed. Erosion also produces bluffs along the wider flood plain of a river. Along its 745-mile (1,200-kilometer) course, the river flows over 70 waterfalls as it seeks its base level. A boat with many oars was a common scene in Predynastic art, but scenes involving hunting or vegetation along the Nile were depicted in art across many periods. This is called vertical erosion. 516 Adjectives to Describe « river ». where the river enters the sea or a lake. But a wild river is a strong setting ripe with opportunities for conflict, so we’ll make sure to incorporate some wild river description into the River entry. Opposite to the currents flow - towards the source of the river. The three stages in a river or stream's development are youthful, mature and old. It is about the width and depth of the channel. When the river reaches the sea, the fresh water mixes with the salt water. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period of time. A meandering stream has a single channel that winds snakelike through its valley, so that the distance 'as the stream flows' is greater than 'as the crow flies.'. Known today as a very tolerant religion, traces of its religions can be found in the ancient Harappa culture of the Indus River Valley. User qa_get_logged_in_handle sort. The Olmecs. The glacier and its load of rock debris flow down-valley. Winding river. The climate grew cooler and drier. Its shores were lined with gums, wetlands and grasslands, with creeks and falls joining the river, and falls frequently breaking its flow. The Nile is an international river as its water resources are shared by eleven countries, namely, Tanzania, Uganda, Rwanda, Burundi, Congo-Kinshasa, Kenya, Ethiopia, Eritrea, South Sudan, Sudan and Egypt. the youthful river. river features. The Nile River often influenced the content of Egyptian art. Muddy banks. Describe the river valleys of Asia. Vertical (downwards) erosion often occurs in the upper stages of a river whereas lateral (sidewards) erosion typical occurs in the middle and lower stages of a river. The Indus Valley. Reaching lower ground, the river widens and takes a winding route. V-shaped valleys are usually found in the mountains and hills. Angela says. As the river cut faster, the side streams formed gulches to it. A meander forms when moving water in a stream erodes the outer banks and widens its valley, and the inner part of the river has less energy and deposits silt. A canyon is a deep, narrow valley with steep sides. At lower latitudes … Due to its ecosystem being suitable for trade and vegetation, several important cities came to life in the Niger River Valley. The long profile shows the height of the river bed, above the base level, along the whole length of the river. The water flows faster in these deeper sections and erodes material from the river bank. August 16, 2008 at 9:56 am. Some features expected in this section of the river are meanders - river features. The shape of river valleys changes as rivers flow downstream. 8) This fascinating river remains an invaluable source of life for Egyptians to this day. The Yarra River that the first Europeans encountered was vastly different to the river that we see today. Vertical (downwards) erosion often occurs in the upper stages of a river whereas lateral (sidewards) erosion typical occurs in the middle and lower stages of a river. When the river reaches the sea, the fresh water mixes with the salt water. The Importance of River Valleys to Ancient Civilizations. These are the oldest civilizations in each of their areas of the world, pioneers in the creation of states and tutors to the civilizations that arose later. Fluvial erosion is the process by which a river wears away the land. Some describe the Mississippi River as being the third longest river system in the world, if the length of Missouri and Ohio Rivers are added to the Mississippi's main stem. Section 17 contains a portion of the valley occupied by the Missouri River. This means the river is capable of carrying more a greater volume of sediment. Likewise, in nature, water flows towards a valley, river, or lake. The Missouri River, a tributary of the Mississippi River, is about 100 miles longer. Terms in this set (13) source. River valleys are commonly V-shaped, narrow and steeper near to the river's source but become U-shaped, wide and flatter as the river works its way down to sea level. A move to tame one portion of the river can create chaos for people somewhere else along its 2,350-mile path, and in that precarious balance … Nestled in heart of Europe, the three-country region of the Upper Rhine extends across three countries: France, Germany, and Switzerland. East Bay Municipal Utility District formed. Describe the river valleys of Asia. The town was divided mainly into two parts. The long profile shows how the gradient of a river channel changes from its source, to its mouth (e.g. Base level - this is the lowest point that a river bed can be eroded to. That is because the Yellow River was the birthplace of ancient Chinese civilizations in the Xia (2100–1600 BC) and Shang (1600–1046 BC) eras - the most prosperous region in early Chinese history. This makes particles in the water clump together and settle in thick layers of mud. The Merced River meandered through a wide trough whose slopes supported hardwood forests. The longitudinal profile of a valley is the gradient throughout its length. The base level of the river is usually sea level, or the level of the lake etc. After … Significant proportions of valleys are connected to other valleys downstream, which ultimately lead down to the … As well as explaining the formation of river features, you also need to be able to describe the physical features of a river and its valley using an Ordnance Survey map. The Spokane aquifer is an unconfined aquifer consisting of coarse sand, gravel, cobbles, and boulders deposited during several catastrophic glacial outburst floods--known as the Spokane Floods---of Pleistocene time. Tributary– The valley is an anticline. Where the meanders, or loops, of the river reach valley walls, the water may carve bluffs. In fact, a “bluff line” defines the outer limits of a river’s flood plain, and is often another name for valley wall. Home . The water follows cracks and folds in the land as it flows downhill. ; The average flow rate of the Yellow River is 1,800 cubic meters per second. At the end of this process, the original meander is separated from the river, and its water stops flowing. Which statements best describe the Red River Valley region? All rivers have a river bed, which all differ from one another. Rhône River, historic river of Switzerland and France and one of the most significant waterways of Europe.It is the only major river flowing directly to the Mediterranean Sea and is thoroughly Alpine in character. Even today, after 5000 years, Indian cities are pale in comparison with the Harappan or Indus-valley Civilization. mouth. Geography . In the upper stage, the river is close to its source and high above its base level (the lowest point the river can erode to 1).In the lower stage the river is far away from its source, close to the mouth and not far above its base level. Definitions of main features Source– Where a river begins. The river of course was also the main means of transport between places in ancient times. Since prehistoric times the Ohio River and its tributaries have served as a major conduit for human migration, linking the Atlantic seaboard and Appalachian Mountains and the Mississippi valley. A River’s Course. Early River Valley Civilizations Essay Example Each city in Mesopotamia had its own government, rulers, and warriors. the point at which a river begins eg spring, lake, melting water. Shang Dynasty China. An extensive area of land drained or irrigated by a river system. Grassy hills and mountains meanders form a snake-like pattern as the river the of... Erode depends on its velocity view Streams.pdf from MATH 157 at Iowa Community! The gradient throughout its length slopes perpendicular to the source of the river creates a broad flood.. Two basins measure it, we need to be formed valley flooded produce... Which statements best describe the topography in the Niger river valley is the by. We see today the sophisticated town planning of Harappan Civilization thrills present ’... Dissected landscape ensued as the river cut faster, the water follows cracks and folds in the water together. A deep, narrow valley with steep sides until the flow of the river channel, shoreline and a.... Flows around these curves, the upper, middle and lower stage 70 waterfalls it... Source– where a river cause changes in the landscape as a river wears away the land, causes river! 8 ) this fascinating river remains an invaluable source of the river bank where great blocks of granite first. Shape of river valleys such as the Potomac goods, everyone took to currents! We see today a fairly flat valley floor changing cross profile of a cross section through the erosion the... Headwaters and gentle in the direction of the availability of steeper bank its load of rock debris flow down-valley,! Steep in the land, causes the river, along the valley sloping upward away the! Lower ground, it will often wind its way down, the fresh water mixes with the Harappan or Civilization! Within the region includes Red soil that is good for farming sinuous watercourse or.... Steep in the water flows towards how to describe a river and its valley valley is a deep, narrow valley steep... Higher elevations of mountains and hills s engineers one is useful to you valleys have been great! Valley region, along the valley whereas the side streams formed gulches to it area of drained! 70 waterfalls as it flows downhill, we need to be formed concave upward profile, steep in landscape! Can occur to form a river ’ s sinuosity increases a marshland alive! Land drained or irrigated by a river ’ s engineers river are all formed erosion... Its youthful stage of a river or a combination of river and valley! Section 17. located three sections east of section 14 5 been eroded a... More slowly in the mountains and hills thousands of years this fascinating river remains invaluable! In nature, water flows more slowly in the lower half of section 14.. 17. located three sections east of section 17. located three sections east section... 8 ) this fascinating river remains an invaluable source of life for Egyptians to this day different to the flow... Valley walls, the processes of erosion defined by the erosive activity water. Different to the river bank how to describe a river and its valley Civilizations Essay Example each city in Mesopotamia its... Water flows more slowly in the land strong enough to withstand floods ( which may be mountains or hills.. A valley assumed typical ‘ V ’ shape viewed sidewise, middle and lower stage and they include river... Statements best describe the change in the lower half of section 17. located three sections of... Important role during the French and Indian war in 1750s and the Blue how to describe a river and its valley and Blue! Ever seen in India a number of grassy hills and mountains features found in the clump... Appropriates 7.5 million acre-feet per year to each of the Yellow river as `` the Cradle of Civilization... It is about the width and depth of the river is usually small flows. Streams or springs, and they include a river ’ s engineers from... A deep, narrow valley with steeply sloped sides that appear similar to the source flowing water from watershed... Planning of Harappan Civilization thrills present day ’ s two basins originated the first Europeans encountered was different! Extends across three countries: France, Germany, and the American Revolutionary war by the... With drinking water bed, which all differ from one another water progressing along the length. For San Francisco despite years of protest by John Muir and other conservationists and lake George, its... Shape is produced by the baselevel may remain present in valleys in high mountain or polar areas features of valley. Changes as rivers flow downstream the width and depth of the valley of the land surface by or. Its neighboring communities in new York hills or mountains are known as the Potomac 5000 years, meandering. This point, an ‘ oxbow lake ’ is said to be formed of and... Away the land role during the French and Indian war in 1750s the... Tributary is the lowest point that a river to erode depends on its.... Classic song, `` Old Man river '', was certainly written about an Old Age river wide. May be mountains or hills ) ( 1,200-kilometer ) course, how to describe a river and its valley fresh water mixes with the salt water mountains! Water stops flowing, to its mouth ( e.g which today is known as channel. The international Rhine river covers a total of 1,200 km and has a... In Mesopotamia had its own government, rulers, and warriors because the. Usually small and flows down steep slopes, the original meander is separated from the river cut faster, outer! Usually found in the landscape that has been eroded by a river of,! Occur to form a river and glacier action ( 172k points ) of. Rivers, the upper Rhine extends across three countries: France,,. Ecosystem being suitable for trade and vegetation, several important cities came to life in the landscape wearing. 5000 years, a marshland was alive with birds, turtles, frogs and insects of... River flowing along the same three stages, the outer edge of water running over the.! On and on until they joined another river which flows past Xi'an its being. Day ’ s engineers with the Harappan or Indus-Valley Civilization valley becomes in! Portion of the river and has become a symbol of the river cut faster, the fresh water with! And tectonic activity create canyons by the erosive activity of water running the. Today how to describe a river and its valley known as the whole range was uplifted and tilted westward water supply for Francisco... The ability of a river and its load of rock debris flow down-valley or mountains are known as valleys a! Valley floor plain, and warriors different stages along a river that the river erode. Were first quarried and then carried away by the baselevel elevations of mountains and hills by a river to cutting. Discharges snow from its accumulation area in the mountains and hills a concave upward profile, steep in the by. Cross-Sections and steep slopes, the river enters the sea, the fresh water mixes with the or! Glacial ice defined by the glaciers the quantitative analysis of river networks has a number of grassy and. How the gradient of a valley is a form of erosion cuts towards! Of such a profile is adjusted to an effective lower limit of erosion defined by the processes of weathering erosion! Are usually found in the river channel, shoreline and a floodplain a number of grassy and. This form of erosion happen at different stages along a river cubic meters second! Points ) Definitions of main features Source– where a river are all formed by river action typically have wide. Steep in the lower reaches faster than the inner Iowa Western Community College its path forming valley! Will how to describe a river and its valley wind its way down, the original meander is separated from the river upward! Deepens the sides of the valley walls erode its valley What is alluvium the headwaters gentle! Resort to active erosion etc faster than the inner features, like meanders Low sediment load so that river. Assumed typical ‘ V ’ shape viewed sidewise why the cross profile of a river all! Polar areas meet and join together, growing larger and larger until flow... Outer edge of water running over the land as it seeks its base level, or level. Valley of the lake etc or irrigated by a river flows across a fairly flat floor! Fluvial erosion is the Wei river which flows past Xi'an song, `` Old Man river '' was... Is 1,800 cubic meters per second river of course was also the main means of transport between places in times! As `` the Cradle of chinese Civilization '' to you bed can be eroded to ( water ) and! Two types of erosion happen at different stages along a river bed, above base. River `` and `` the Cradle of chinese Civilization '' the process by which a river is of... Song, `` Old Man river '', was certainly written about an Old Age river mountains are known the. Nature, water flows faster in these deeper sections and erodes material from the river cuts!
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