The run off increases with

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RSMSSB JE Civil Diploma Oct 2016 Official Paper

Answer 1

The factors affecting the runoff can be summarised in below tabulated form

Parameter	Description
Intensity of Rainfall	Higher the intensity of rainfall more will be the volume of water on ground and more will be runoff.
Infiltration Capacity	Higher the infiltration capacity of soil means more water is getting into inside the soil and less water available for runoff, hence reduces runoff.
Permeability of soil	Higher the permeability of soil means more water is getting into inside the soil and meeting to ground water and less water available for runoff, hence reduces runoff.
Urbanization	Urbanization reduces the infiltration capacity and hence, increases the runoff
Rainfall amount, Rainfall duration	Rainfall lasting for longer period creates more runoff.