what term generally refers to the highest percentage of the annual sediment load moved by a stream? suspended load. You just studied 24 terms!
The Amazon River discharges 7,380,765 cubic feet per second of water, and it represents 20% of the world’s riverine discharge into the ocean. The Amazon basin is now the largest water drainage basin in the world covering an area of 2,720,000 square miles.
Gradients usually decrease downstream in a major river system. Alluvium refers to stream deposits, mainly sand and gravel. The lowest base level for most streams is sea level. … Urbanization lowers peak discharges on small streams by routing the runoff directly to the stream.
Which one of the following best describes how urbanization affects small-stream watersheds? Infiltration decreases; lag time between storms and peak runoff shortens.
The sediment yield from any drainage system is calculated by averaging the data collected over a period of years. It is, therefore, an average of the results of many different hydrologic events.
Sediment yield (SY) is defined as the amount of sediment leaving the watershed or catchment, and gross erosion is defined as the absolute amount of erosion occurring within the catchment.
|gradient||The steepness or vertical drop of a stream over a specific distance.|
|hot spring||A spring formed where hot ground water flows to the surface.|
|hydrologic cycle||The continuous circulation of water among the hydrosphere, the atmosphere, the biosphere, and the geosphere; also called the water cycle.|
Gradient (the slope of the land) decreases as rivers flow because the river meanders across the land rather than erode into it and follow a straight path as it does in the source. This means it covers a decrease in height over a longer distance the further downstream you get.
Alluvial Fans – When a steep mountain stream enters a flat valley, there is a sudden decrease in gradient and velocity. Sediment transported in the stream will suddenly become deposited along the valley walls in an alluvial fan.
Over the last two centuries, urbanization has caused changes in watershed hydrology that include declines in the natural filtering capacity of river systems (e.g., channelization of headwater streams, loss of floodplains and wetlands) and regulation of flows due to the construction of dams and impoundments.
Urbanization generally results in increased magnitude and frequency of peak flows. However, baseflow effects typically are more variable, with studies showing a range of responses in urban streams [Lerner 2002, Brandes et al.
The most important influence on direct runoff change was urban surface change caused by urbanization. Urbanization can cause a large amount of pervious surface to turn into impervious surface, changing the hydrologic cycle and reducing infiltration rates [45,46,47].
Water Yield is defined as the average amount of fresh water that runs off in an unregulated watershed.
In general, the greater the flow, the more sediment that will be conveyed. Water flow can be strong enough to suspend particles in the water column as they move downstream, or simply push them along the bottom of a waterway 11.
Erosion is the process where soil particles are dislodged or detached and put in motion. 2. Sedimentation is the process whereby detached particles are deposited elsewhere.
In geology and geomorphology a base level is the lower limit for an erosion process. … The height of a base level also influences the position of deltas and river terraces. Together with river discharge and sediment flux the position of the base level influences the gradient, width and bed conditions in rivers.
Gravel / Soft Disintegrated Rock. (SDR)
The biggest delta in the world is the Ganges Delta in Bangladesh and India. The delta is 350 kilometers (220 miles) along the Bay of Bengal. So many smaller rivers empty into the Ganges Delta, the area is sometimes called the “Mouths of the Ganges.” in large amounts.
The Amazon River: The largest river by volume, the river Amazon, represents 20% of the global riverine discharge to the Atlantic Ocean. Also featuring the largest basin, it has a drainage area of 2,722,020 square miles.
The Nile is estimated to be between 5,499 kilometers (3,437 miles) and 6,690 kilometers (4,180 miles) long. There is no debate, however, that the Amazon carries more water than any other river on Earth. Approximately one-fifth of all the freshwater entering the oceans comes from the Amazon.
Yangtze River, Chinese (Pinyin) Chang Jiang or (Wade-Giles romanization) Ch’ang Chiang, longest river in both China and Asia and third longest river in the world, with a length of 3,915 miles (6,300 km).
|River||Total Length (km)|
The Godavari is India’s second longest river after the Ganga.Oct 22, 2018
The Roe River
There, you will find what The Guinness Book of World Records has called the shortest river in the world. The Roe River measures an average 201 feet in length.May 5, 2019
But even more impressive is the canyon that the lower Congo cuts as it empties out to sea. It’s the deepest river in the world.Sep 28, 2015
The Amazon is considered the world’s largest river by volume, but scientists have believed it is slightly shorter than Africa’s Nile. The Brazilian scientists’ 14-day expedition extended the Amazon’s length by about 176 miles (284 kilometers), making it 65 miles (105 kilometers) longer than the Nile.
A V-shaped valley is a narrow valley with steeply sloped sides that appear similar to the letter “V” from a cross-section. They are formed by strong streams, that have cut down into the rock through downcutting/stream erosion. These valleys form in streams in their upper course.
the lowest base level for most streams is sea level.
gradients usually decrease downstream in a major river system.
where is erosion concentrated along a meandering stream?
which of the following features characterize wide streams and valleys?
________ refers to sediments deposited from streams.
which of the following must result in a lower base level for rivers and streams?
what term describes the movement of water through earth’s hydrosphere?
if the sea level drops or the land rises the base level for rivers and streams will