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Firstly an attenuation is the reduction in the peak of a hydro-graph as it moves

downstream, resulting in a more broad, flat hydro-graph.


Therefore the attenuated peak is the highest point before it attenuates.



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12y ago

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Why is a storm hydrograph useful?

A storm hydrograph is useful because it shows how a watershed responds to a storm event by plotting discharge over time. This helps in predicting peak flows, assessing flood risk, and designing infrastructure to manage stormwater effectively. It also provides valuable information for watershed management and water resource planning.


What is Rainfall Peak?

The peak rainfall is the highest amount of rain in a place on a hydrograph.


How do you contrast a storm hydrograph?

how do you compare and contrast hydrographs


How do you work out lag time on a hydrograph?

the time between the heaviest rainfall and the peak discharge


How do you calculate the lagtime of a hydrograph?

To calculate the lag time of a hydrograph, you first identify the peak discharge point on the hydrograph and then locate the corresponding point where the rainfall event begins. The lag time is the time difference between the start of the rainfall and the peak discharge, typically measured in hours. This value helps in understanding the response of a watershed to precipitation events.


On a hydrograph what does the area under the curve equal?

Total Volume of rainfall for that storm event


What affects the shape of a storm hydrograph?

The shape of a storm hydrograph is influenced by factors such as precipitation intensity, duration, and distribution, as well as the characteristics of the watershed such as size, slope, soil type, land use, and vegetation cover. These factors determine how quickly water enters the river system and how quickly it moves through it, ultimately shaping the hydrograph.


What does the lag time showon a hydrograph?

It shows us the time between the peak rainfall and peak discharge. Peak rainfall is the highest rain amount. Peak discharge is the highest the water level reaches in the river.


Why is there a lag time between the peak rainfall and peak discharge on a hydrograph?

The lag time between peak rainfall and peak discharge on a hydrograph occurs because it takes time for water to travel through the watershed from where it falls as rain to the main channel of a river. Factors like soil type, topography, land use, and drainage patterns influence the flow pathways and the time it takes for water to reach the stream channel.


How do you calculate peak flow?

Use those speacial reading graphs You should have a hydrograph to look at. Look at the curve on this graph, the highest point on this curve is the peak flow. It cannot be calculated, just read off a graph. Peak Flow = Tidal Volume x 60 / I-time


What does at the peak of the storm the wind is a coyote in pain mean?

the storm was really bad


The unit of hydrograph for an infinitesimally small during of effective rainfall is called?

The unit of hydrograph for an infinitesimally small duration of effective rainfall is called unit hydrograph. It represents the response of a watershed to a unit input of effective rainfall over time.