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

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What is the most important point to be considered while fixing the canal capacity?

asked Jul 29, 2023 in Irrigation Engineering by Carter (75.2k points)

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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.

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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.

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By how much percentage canal capacity is increased to meet peak demands?

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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.

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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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. (a) Assuming 20% losses of water in the water courses, find duty at the head of the course. (b) Find the duty of the water at the head of the distributary, assuming 10% losses from the distributary head.

asked Jul 31, 2023 in Irrigation Engineering by Carter (75.2k points)

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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?

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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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?

asked Jul 29, 2023 in Irrigation Engineering by Carter (75.2k points)

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We can find out monthly or fortnightly water requirements of various crops using intervals.

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In a wide stream, a suspended load sample taken at a height of 0.30 m from the bed. The stream is 5.0 m deep and has a bed slope of 1/4000. The bed material can be of uniform size. Estimate the shear friction velocity.

asked Jul 31, 2023 in Irrigation Engineering by Carter (75.2k points)

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What type of structure is provided when earth has to be brought from somewhere else for canal construction?

asked Aug 15, 2023 in Irrigation Engineering by Carter (75.2k points)

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The velocity of flow in a channel should not more or less, but instead it should be adequate.

asked Aug 15, 2023 in Irrigation Engineering by Carter (75.2k points)

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Which of the following is not a reason which leads to a canal breach?

asked Aug 19, 2023 in Irrigation Engineering by Carter (75.2k points)

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Which of the following is not a preventive measure for the maintenance of the canal?

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asked Aug 19, 2023 in Irrigation Engineering by Carter (75.2k points)

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Design a channel carrying a 30 cumecs. The median grain diameter is taken as 0.5 mm. The bedload concentration is 60 p.p.m by weight. Use Lacey’s Regime perimeter and Meyer-peter’s formulas.

asked Jul 29, 2023 in Irrigation Engineering by Carter (75.2k points)

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For the design of non-scouring channels in coarse alluviums, the shield’s entrainment function should be ____________

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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If the width of a river increases, the discharge per unit width will decrease and therefore, sediment carrying capacity will increase.

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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For a canal that irrigates the area directly the fall should be provided at a location FSL outstrips the G.L before the bed of the canal comes into the filling.

asked Aug 19, 2023 in Irrigation Engineering by Carter (75.2k points)

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In the external silting method, subsidiary banks are constructed which run parallel to canal main banks.

asked Aug 16, 2023 in Irrigation Engineering by Carter (75.2k points)

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The Remodelling of canal system is done to __________

asked Aug 15, 2023 in Irrigation Engineering by Carter (75.2k points)

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For the bed of the canal, the average shear stress is equal to the tractive force per unit area.

asked Jul 31, 2023 in Irrigation Engineering by Carter (75.2k points)

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The shear stress required to move grain on the side slopes is less than the shear stress required to move the grain on the canal bed.

asked Jul 31, 2023 in Irrigation Engineering by Carter (75.2k points)

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