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Q: How do you calculate the lagtime of a hydrograph?
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The unit of hydrograph for an infinitesimally small during of effective rainfall is called?

Instantaneous Unit Hydrograph


What is the difference between hydrograph and hyetograph?

hyetograph is the graph between intensity of rainfall and time whereas hydrograph is the graph between discharge and time.


What is a flood hydrograph?

A hydrograph is showing the discharge (rate of flow) versus the time past in a specific river point. One of the types of hydrography is called a flood hydrograph, it is used to measure the river's characteristic basically a dual plot of discharge and rainfalls.


What affects the shape of a storm hydrograph?

amount of precipitation


How do you contrast a storm hydrograph?

how do you compare and contrast hydrographs


What is does a hydrograph show?

the amount of discharge in a river over a period of time


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

because there is


What is the flood routing types?

IS the technique of determining flood hydrograph at a section of river


What is Rainfall Peak?

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


How do you find the lagtime of an earthquake?

lag time=(time it takes the s-wave to travel)-(time it takes the p-wave to travel)


How would the hydrograph of a large rainstorm change after urbanization of an area?

Urbanization can lead to increased impervious surfaces like roads and buildings, reducing infiltration and increasing runoff. This can cause a faster rise in streamflow during a rainstorm, resulting in a higher peak discharge and a shorter lag time in the hydrograph. Additionally, urbanization can increase the volume of runoff, leading to larger flood peaks and potentially worsening flood events.


What is peak rainfall mean?

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