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What Happens To The Amount Of Stream Discharge From The Source Of A Stream To Its Mouth??
While gradient decreases between a streams headwaters and mouth discharge increases.
What happens to the gradient of a stream as it flows towards its mouth?
As the river flows towards the mouth the gradient of the slope becomes less steep. Eventually the river will flow over flat land as it approaches the sea. As the river moves from the source to the mouth – both the depth of the river and the width of the river will both increase.
What happens when a stream changes from its headwaters to its mouth?
Discharge increases downstream in most rivers as tributaries join the main channel and add water. Sediment load (the amount of sediment carried by the stream) also changes from headwaters to mouth. At the headwaters tributaries quickly carry their load downstream combining with loads from other tributaries.
Why does the discharge of a river increase downstream?
Discharge increases downstream because of additional water from tributaries. Velocity increases due to the additional water from tributaries and less water is in contact with the bed and banks so there is less friction. Find out more about the long profile of a river.
How does discharge typically change in a stream seasonally?
Stream flow or discharge is the volume of water that moves over a designated point over a fixed period of time. … It also changes during different seasons of the year decreasing during the summer months when evaporation rates are high and shoreline vegetation is actively growing and removing water from the ground.
How does stream discharge change from high gradient to low gradient streams?
High-gradient streams can result in downward erosion or downcutting. … Typically streams in the lower areas of a river system have lower gradients than those in higher areas. They also have wider channels and wider floodplains. The width of the valleys increases as discharge increases.
What is the discharge of a stream river )?
Stream discharge is also referred to as flow. It measures the amount of water flowing in a stream at any particular point in time. Stream discharge is expressed as a rate with two components: Volume of water expressed in cubic feet.
How do velocity and discharge affect stream erosion and deposition?
How is stream discharge determined?
The discharge of a stream is the product of its velocity (V – length of travel per unit of time such as feet/second) times depth of the water (D – unit of length) times width (W of the water – units of length).
How does stream gradient change from stream head to mouth?
headwaters to the mouth. As you move from head waters to mouth the stream goes from high elevation to lower elevation and the water gets deeper at the mouth. Sediments at the head waters will be the largest and will get smaller and smaller as you get closer to the mouth.
What affects stream discharge?
Stream discharge is the amount (volume) of water carried by a stream past a point per second. … The velocity of the water affects it faster water means more passes per second so more discharge. The width and depth of the river also affects it a larger river at the same speed will have higher discharge.
What affects the discharge of a river?
How does a river change from upstream to downstream?
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. Water moving past and over rocks dirt and other materials erodes them and often sweeps them along to be deposited further downstream.
What is stream discharge quizlet?
stream discharge. the volume of water passing a given point over a set time.
What is discharge a measurement of quizlet?
What is discharge? … Discharge is the volume of water per unit of time. Velocity x Width x Depth = Discharge. measured in cumecs (cubic metres per second) You just studied 6 terms!
Which of the following refers to stream discharge?
Which of the following refers to stream discharge? The volume of water passing a point on the stream bank in a given time. What are threats to the long-term sustainability of a river?
How does stream discharge and gradient affect the erosive ability of a river?
Discharge and gradient affect the erosive ability of a river because discharge and gradient determine the velocity of the river and the velocity affects the erosive ability of the river. The greater the velocity the greater the erosive ability of the river is.
When there is more discharge what happens to stream velocity?
As one moves along a stream in the downstream direction: Discharge increases as noted above because water is added to the stream from tributary streams and groundwater. As discharge increases the width depth and average velocity of the stream increase.
What is the relationship between gradient and elevation of stream?
Stream gradient is the grade measured by the ratio of drop in elevation of a stream per unit horizontal distance usually expressed as meters per kilometer or feet per mile.
How does discharge affect the amount of material a stream can transport?
What is discharge in fluid?
A discharge is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass. … The area is the cross sectional area across a river and the average velocity across that section needs to be measured for a unit time commonly a minute.
What are the three factors that determine the discharge of a stream?
- 1) Rock and soil type.
- 2) Weather conditions.
- 3) Type and amount of Rainfall.
- 4) Type of land.
How does the velocity of a stream influence whether sediment in the stream will be eroded or deposited?
Increased flow will increase the stress on the bed making it more likely for water flow to initiate sediment transport. The higher velocity also increases erosion rates as flow overcomes the shear stress of sediment 13.
What is the relationship between the carrying capacity of a stream and its discharge and velocity?
The greater the discharge and velocity is in a stream the greater the stream’s carrying capacity.
How do stream transportation erosion and deposition relate to stream velocity and particle size?
Erosion by Streams
Flowing streams pick up and transport weathered materials by eroding sediments from their banks. … The size of particles that can be carried within a load is determined by the stream’s velocity. Faster streams can carry larger particles. Streams that carry larger particles have greater competence.
How do you calculate the discharge of a river?
Discharge is the volume of water moving down a waterway per unit of time. It is most commonly expressed in cubic feet per seconds or gallons per day. To calculate discharge multiply the area of water in a channel cross section by the average velocity of water in that cross section.
How do gradient and discharge change between a stream’s source and its mouth?
How do gradient and discharge change between a stream’s headwaters and its mouth? While gradient decreases between a stream’s headwaters and mouth discharge increases. How might lowering base level affect stream erosion? Lowering base level could result in incised meanders.
Why is it important to know the discharge in a canal system?
In order to supply the required amounts of water to the crops and to avoid waste by supplying too much it is important to know the discharges in the canals. … In general in the same canal section one can say that the water level is low for small discharges and it is high for large discharges as shown in Figure 9.
When the discharge of a stream becomes so great that it exceeds its carrying capacity?
Floods occur when a stream’s discharge exceeds the capacity of the channel causing the stream to overflow its banks. 2.
Is the discharge in a stream increases load usually?
As discharge increases generally width depth and velocity of the stream also increase. Load – The rock particles and dissolved ions carried by the stream are the called the stream’s load. … Higher velocity currents in the stream can carry larger and denser particles.
How does precipitation affect discharge?
Where does river discharge come from?
What I mean is groundwater contributes to streams in most physiographic and climatic settings to a certain degree some of the water flowing in rivers comes from seepage of groundwater into the streambed. The water flowing in rivers still originates from precipitation but it is not all from surface runoff.
How does drainage density affect river discharge?
Large basins receive more precipitation than smaller basins therefore they have a larger runoff. … Basins with a higher drainage density (number of tributary rivers) collect rain water more quickly therefore the lag time will be shorter.
