A definite improvement on the human life cycle. Meanders form a snake-like pattern as the river flows across a fairly flat valley floor. Rejuvenation. Describe the topography in the lower half of Section 17. located three sections east of Section 14 5. by PyranicOfficial The Boss (172k points) The Yarra River that the first Europeans encountered was vastly different to the river that we see today. Two types of erosion happen at different stages along a river. 2. Winding river. meanders - river features. The water flows faster in these deeper sections and erodes material from the river bank. Reaching lower ground, the river widens and takes a winding route. Its water ran out of the valley, through a break in the mountain side. Egypt. 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. 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. At this point, an ‘oxbow lake’ is said to be formed. The Indus-Valley Civilization had the most advanced town planning ever seen in India. User qa_get_logged_in_handle sort. Which statements best describe the Red River Valley region? Opposite to the currents flow - towards the source of the river. A river is characterized by continuously flowing water from an upland source into lakes, wetlands or the sea. Along its 745-mile (1,200-kilometer) course, the river flows over 70 waterfalls as it seeks its base level. You can tell because the cliffs to the west have upward tilting strata that dip away from the center of the valley… 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.'. the point at which a river begins eg spring, lake, melting water. River valleys; These kinds of valleys are created by the erosive activity of water running over the land. 1. A meander, in general, is a bend in a sinuous watercourse or river. Some features expected in this section of the river are The Merced River meandered through a wide trough whose slopes supported hardwood forests. Meandering river channels are asymmetrical. Fluvial erosion is the process by which a river wears away the land. 1922 Colorado River Compact appropriates 7.5 million acre-feet per year to each of the river’s two basins. The movement of rivers, the processes of weathering and erosion, and tectonic activity create canyons. 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. The Merced River wound its way through a shallow indentation in the valley, the genesis of what would eventually shape the valley path. 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. It is about the width and depth of the channel. This can occur to form a river delta, which is a form of braided river. The course a river takes is split into three stages, the upper, middle and lower stage. Even today, after 5000 years, Indian cities are pale in comparison with the Harappan or Indus-valley Civilization. This means the river is capable of carrying more a greater volume of sediment. Nestled in heart of Europe, the three-country region of the Upper Rhine extends across three countries: France, Germany, and Switzerland. 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. 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. The most famous of these waterfalls is located on the border between Argentina and Brazil. mouth. Types of Valleys. U. Upstream. Winding river. 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. 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. Section 17 contains a portion of the valley occupied by the Missouri River. The water flows more slowly in the shallow areas near the inside of each bend. b. The Nile River often influenced the content of Egyptian art. This is called vertical erosion. Angela says. Sumeria. The Nile River often influenced the content of Egyptian art. Geologists classify streams along with rivers and view their development as a flowing body of water progressing along the same three stages. 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. The deepest part of the channel is on the outside of each bend. An elongated lowland between ranges of mountains, hills, or other uplands, often having a river or stream running along the bottom. bend in the river… The Olmecs. 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. https://www.thoughtco.com/rivers-from-source-to-sea-1435349 the youthful river. river features. More than 95% of the country’s population depend on its water and live within a few miles of the river … Fluvial erosion is the process by which a river wears away the land. OHIO VALLEY. V-shaped valleys are usually found in the mountains and hills. The lower end of such a profile is adjusted to an effective lower limit of erosion defined by the baselevel. 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. Meanders are bends in a river that form as a river’s sinuosity increases. Base level - this is the lowest point that a river bed can be eroded to. At the end of this process, the original meander is separated from the river, and its water stops flowing. Some valleys are formed through erosion by glacial ice. River landscapes. 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. 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. This is a low-lying area that often floods. The Importance of River Valleys to Ancient Civilizations. As the river reaches lower ground, it will often wind its way through many towns and cities on its way towards the sea. The length of the Nile River is approximately 6,850 kilometers. 10 million years ago. The international Rhine River covers a total of 1,200 km and has become a symbol of the successful transnational cooperation within the region. Other methods such as horses and camels, only appeared in later times, the later being introduced by the Persians when they occupied Egypt. This is the part of the river closest to the source. The three stages in a river or stream's development are youthful, mature and old. A stream or river that feeds into a larger watercourse. meander. The valley walls wear down, the river creates a broad flood plain, and begins to meander, or develop wide bends. This can cause changes in the direction of the river and create new channels. Erosion also produces bluffs along the wider flood plain of a river. V-Shaped Valley The river will erode downwards in its youthful stage. 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 … Its biggest tributary is the Wei River which flows past Xi'an. When the river reaches the sea, the fresh water mixes with the salt water. As a river flows down steep slopes, the water performs vertical erosion. Tributary– The shape of river valleys changes as rivers flow downstream. The glacier and its load of rock debris flow down-valley. ; The average flow rate of the Yellow River is 1,800 cubic meters per second. Old Age River: The classic song, "Old Man River", was certainly written about an Old Age River. The sophisticated town planning of Harappan civilization thrills present day’s engineers. At this, Pepper gave a short, sharp bark, and, springing across the little river… 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. Home . 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. These glaciers may remain present in valleys in high mountain or polar areas. Rivers are fed by tributary streams or springs, and they include a river channel, shoreline and a floodplain. Name _ Landscapes formed by Streams Learning Objective: Explore how a stream works Summarize stream valley types and Valley profile: this is the shape of the valley on either side of the river channel. River landscapes. The shape of river valleys changes as rivers flow downstream. The valley is an anticline. Braided river formations are common where water flow is slow and there is a build up of sediment in the river. The features found in the youthful stage of a river are all formed by the processes of Erosion. How do rivers erode? 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. A valley is a type of landform which usually features as lowland between two higher landforms (which may be mountains or hills). Although donkeys were also used to transport people and goods, everyone took to the river as a means of transport. Terms in this set (13) source. How can you tell (support your answer)? The physical features of a river and its valley. The gradient is steep. 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