Design Capacity for an Irrigation Canal MCQ

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• Determine the discharge required at the head of the distributary in a canal where Kharif area to be irrigated is 2400 hectares and Rabi area to be irrigated is 1800 hectares, for fulfilling maximum crop requirement. Assume suitable values for kor depth and kor period.
  ক

  2.08 cumec

  খ

  2 cumec

  গ

  2.1 cumec

  ঘ

  2.2 cumec
• Suppose the culturable commanded for a distributary is 8000 hectares, and the intensity of irrigation for Kharif season is 60% and that of rabi season is 30%. The average duty at the head of a distributary is 4000 hectares/cumec for Kharif season and for Rabi season it is 1800 hectares/cumec, find out discharge required at the head of the distributary?
  ক

  1.35 cumec

  খ

  1.32 cumec

  গ

  1.33 cumec

  ঘ

  1.3 cumec
• By how much percentage canal capacity is increased to meet peak demands?
  ক

  30 to 35%

  খ

  20 to 25%

  গ

  15 to 20%

  ঘ

  20 to 30%
• We can find out monthly or fortnightly water requirements of various crops using intervals.
  ক

  True

  খ

  False
• Let us take the gross commanded area of a watercourse is 2000 hectares, 80% of which is culturable irrigable. Intensities of sugarcane and paddy are 30% and 50%. The duties of the crops at the head of the watercourse are 850 hectares/cumec and 1900 hectares/cumec. Find the discharge required at the head of the watercourse?
  ক

  0.98 cumec

  খ

  0.97 cumec

  গ

  0.9 cumec

  ঘ

  0.986 cumec
• At a certain place, the transplantation of a crop takes 15 days, and the total depth of water required by the crop is 90 cm on the field. During the plantation rain falls and about 20 cm is utilised to fulfil the demand. Now determine the duty of irrigation water required during the plantation.
  ক

  185.14hectares/cumec

  খ

  186.25hectares/cumec

  গ

  187.45hectares/cumec

  ঘ

  184.89hectares/cumec
• A pump was installed in a field to supply water to the crops. The duty for this crop is 432 hectares/cumec on the field and the efficiency of pump is 50%. The sown area of the field is 5 hectares. Determine the maximum output required (H.P) of the pump, if the highest water level is 4 meters below the highest portion of the field. Assume negligible field channel losses.
  ক

  0.77H.P

  খ

  0.85H.P

  গ

  0.80H.P

  ঘ

  0.31H.P
• Let us consider in a given area the plantation of a certain crop takes 20 days, and the total water depth required by this crop is 80 cm on the field. Find the duty of irrigation water required for the crop during this period. (
  ক

  Assuming 20% losses of water in the water courses, find duty at the head of the course. ( 182.9 hectares/cumec, 194.4 hectares/cumec

  খ

  Find the duty of the water at the head of the distributary, assuming 10% losses from the distributary head. a) 182.9 hectares/cumec, 194.4 hectares/cumec [ 172.8 hectares/cumec, 185.4 hectares/cumec

  গ

  172.8 hectares/cumec, 194.4 hectares/cumec

  ঘ

  185.6 hectares/cumec, 184.6 hectares/cumec
• What is the most important point to be considered while fixing the canal capacity?
  ক

  Keenest Demand

  খ

  Average Demand

  গ

  Water Demand

  ঘ

  Demand
• Kor demand of the crop should be taken into account while fixing the capacity of a canal.
  ক

  Tue

  খ

  False