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A canal carrying a discharge of 20 m^3/s has cultivable command area of 20,000 hectares.The intensity of crop is 80%, and the base period is 120 days. The duty of the water in hectares/meter is?
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A canal carrying a discharge of 20 m^3/s has cultivable command area o...
Calculation of Duty of Water in Hectares/Meter


Given Parameters:


  • Discharge of canal = 20 m3/s

  • Cultivable command area = 20,000 hectares

  • Intensity of crop = 80%

  • Base period = 120 days



Steps to Calculate Duty of Water:



  1. Calculate the total volume of water required for the cultivable command area during the base period.

  2. Calculate the area of land that can be irrigated with the total volume of water.

  3. Divide the area of land by the total volume of water to get the duty of water.



Calculation:



  1. Total volume of water required = cultivable command area x intensity of crop x base period x 10,000


    • = 20,000 x 0.8 x 120 x 10,000

    • = 192 x 108 m3


  2. Area of land that can be irrigated = cultivable command area x intensity of crop


    • = 20,000 x 0.8

    • = 16,000 hectares


  3. Duty of water = area of land / total volume of water


    • = 16,000 / 192 x 108

    • = 0.083 hectares/meter




Answer:

The duty of water in hectares/meter is 0.083.
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A canal carrying a discharge of 20 m^3/s has cultivable command area of 20,000 hectares.The intensity of crop is 80%, and the base period is 120 days. The duty of the water in hectares/meter is?
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