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  • ICAR and TNAU E-Course Summarized

    Summarized Notes
  • A watershed is changed from rural to urban category over a period of time due to the development process. The effect of urbanization on storm runoff hydrograph of such watershed:

    Question: A watershed is changed from rural to urban category over a period of time due to the development process. The effect of urbanization on storm runoff hydrograph of such watershed:

    Options:

    decreases the volume of runoff
    increases the time to peak discharge
    decreases the time base
    decreases the peak discharge

    🔑 Key Points
    Concept:
    → Effect of urbanization on Hydrograph:
    Urbanization of a rural watershed results in the following significant changes in the characteristics of the watershed:

    🌆 Development of roads surfaces, roofing on developed areas, etc reduces vegetative area which increases Impervious surface area causing lesser percolation/infiltration of water and higher runoff as shown in figure (1)

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