Contents
What are the factors that determining the flow of a river?
Answer: The velocity of a river is determined by many factors, including the shape of its channel, the gradient of the slope that the river moves along, the volume of water that the river carries and the amount of friction caused by rough edges within the riverbed.
What is river discharge measured in?
cubic feet per seconds
Measuring Discharge 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.
What is flow rate of a river?
The flow rate in a river, stream or pipe can be determined by multiplying water velocity by the cross-sectional area. For example, if water was flowing through a 1 foot diameter pipe (area = 0.8 ft2) at 5 feet per second, the flow rate would be 0.8 ft2 x 5 ft/sec = 4 ft3/sec.
What is the salinity of a river?
Salinity is the measure of the amount of dissolved salts in water. It is usually expressed in parts per thousand (ppt) or percentage (%). Freshwater from rivers has a salinity value of 0.5ppt or less.
What is the first factor that controls the destination of a river system?
First is gravity. A river that is fairly flat is likely to have a slower flow velocity than one which is on a steep hill. The second factor is friction. Water moves most quickly when it has less resistance, so the friction of water against rocks slows it down.
What are the factors determining the flow of a river Class 9?
The cross-sectional shape of a river dictates how much friction will impact the flow of water within a river. Finally, the sediment load, or the amount of rocks and soil in the river, impacts its flow velocity and shape.
How do you calculate streamflow?
Multiply the average depth of the stream by the width of the stream to find the area in ft2. Divide the distance traveled by the average travel time to find the velocity of the stream in ft/sec. Multiply the velocity of the stream by a correction factor. This is the corrected velocity of the stream.
Is salinity good or bad?
Salinity affects production in crops, pastures and trees by interfering with nitrogen uptake, reducing growth and stopping plant reproduction. Some ions (particularly chloride) are toxic to plants and as the concentration of these ions increases, the plant is poisoned and dies.
How is the flow rate of a river determined?
The flow rate -volume of water crossing a section of a stream for one unit of time- is expressed in cubic metres per second (m 3 /s). Each watercourse follows a particular regime, determined by the rhythm of precipitation and its hydrological “terroir”.
How are rating curves used to measure stream flow?
A rating curve (fig. 3) is a graphic representation of the relation between stage and streamflow for a given river or stream. USGS computers use these site-specific rating curves to convert the water-level data into information about the flow of the river.
How is the flow of the Amazon River determined?
Each watercourse follows a particular regime, determined by the rhythm of precipitation and its hydrological “terroir”. For the world’s most populated river, the Amazon, the variation in flow between two extreme months of the same month is only one to two.
How is the velocity of water measured in a stream?
The current meter is used to measure water velocity at predetermined points (subsections) along a marked line, suspended cableway, or bridge across a river or stream. The depth of the water is also measured at each point.