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

← Prev Question Next Question →

1 Answer

Related questions

+1 vote

1 answer

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)

+1 vote

1 answer

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)

+1 vote

1 answer

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)

+1 vote

1 answer

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)

+1 vote

1 answer

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.

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

+1 vote

1 answer

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

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

+1 vote

1 answer

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

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

+1 vote

1 answer

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)

+1 vote

1 answer

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.

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

+1 vote

1 answer

With what equation we can calculate the berm width?

asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

The actual capacity of silt laiden water channel is worked out with 1/2 : 1 side slopes.

asked Aug 22, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

Water in which condition or state carry a maximum amount of sediment?

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

+1 vote

1 answer

A wide unlined channel carrying silt-free water has a depth of 2.0 m. The maximum slope that can be given to a channel is 1 in 10,000. Calculate the maximum tractive stress permissible on the bed to prevent scouring.

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

+1 vote

1 answer

Calculate the quantity of bed load transport by using Meyer and Peter formula if the effective tractive force that causes bed load transportation is 2.5 N/m^2.

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

+1 vote

1 answer

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)

+1 vote

1 answer

Calculate the effective unit tractive force that causes bed load transportation if the unit tractive force produced by the flowing water is 3.20 N/m^2. The Manning’s coefficient on an unrippled bed is 0.0108 and the actual observed value of Manning’s coefficient on ripped channels is 0.0222. Take the value of critical shear stress that is required to move the grain particle as 0.5 N/m^2.

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

+1 vote

1 answer

The berms help in checking excessive loss of water due to seepage.

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

+1 vote

1 answer

Calculate the ratio of the tractive critical stress to the average shear stress if the water flows at a depth of 0.8 m in a wide stream having a bed slope of 1 in 3000. The median diameter of the sand bed is 2 mm.

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

+1 vote

1 answer

Which type of force is needed for suspension of suspended load in flowing water?

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

+1 vote

1 answer

What cause is prime responsible for the heavy movement of water from main canal to branch canal?

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

+1 vote

1 answer

The water flows at a depth of 0.6 m in a wide stream having a bed slope of 1 in 2500. The critical tractive stress is 0.53 N/m^2. Determine the motion of soil grains and the average shear stress.

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

+1 vote

1 answer

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)

+1 vote

1 answer

By using canal regulation works we can control discharges, depths, and velocities in the canals.

asked Aug 22, 2023 in Irrigation Engineering by Carter (75.2k points)

+1 vote

1 answer

How can we improve the duty of water?

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

+1 vote

1 answer

Given that a particular crop requires about 20 cm depth of water at an interval of 40 days, and the base period is 400 days. Find the delta for the crop? Now using this delta find the duty of water for the crop?

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

...