mentorjilo.blogg.se - Water conveyance efficiency formula

The average of these absolute values of deviations from the

The absolute values of these deviations from the mean are 0.24, 0.14, 0.04, 0.16 and 0.26. The observed depths at five stations are 2.0, 1.9, 1.8, 1.6 and 1.5 metres, respectively. Compute the water distribution efficiency. Their observed values are 2.0, 1.9, 1.8, 1.6 and 1.5 metres. When the water has penetrated uniformly throughout the field, the deviation from the mean depth is zero and water distribution efficiency is 1.0.Įxamples: The depths of penetrations along the length of a boarder strip at points 30 metres aprt from probed. The water distribution efficiency represents the extent to which the water has penetrated to a uniform depth, throughout the field. d = Water distribution efficiencyĭ = Mean depth of water stored during irrigation.ĭ = Average of the absolute values of deviations from the mean.The effectiveness of irrigation may also be measured by its water distribution efficiency (Î (v) Uniformity coefficient or Water distribution efficiency: Output = 32 hectares land is storing water upto 0.3 m depth, Volume of water supplied by 10 cumecs of water applied for 4 hours ï€½(10 =(4 60x 60)m 3 = 1,44,000 m 3 Compute the water application efficiency. Soil probing after the indicated that 0.3 metre of water has been stored in the root zone. 100 = 80%Įxample: 10 cumecs of water is delivered to a 32 hectare field, for 4 hours.

0.8 cumec is delivered to a turn out, 0.9 kilometres from the well. It may be represented by ÎĮxample: Once cumec of water is pumped into a farm distribution system.

u): It is the ratio of the water beneficially used, including leaching water, to the quantity of water delivered.

s): It is the ratio of the water stored in the root zone during irrigation to the water needed in the root zone prior to irrigation (i.e., field capacity â€'existing moisture content).

It may also be termed as farm efficiency, as it takes into account the water is lost in the farm.

a): It is the ratio of the quantity of water stored into the root zone of the crops to the quantity of water actually delivered into the field.

It takes the conveyance or transit losses into account.

c): It is a ratio of the water delivered into the fields from the outlet point of the channel, to the water pumped into the channel at the starting point.

Water is lost in irrigation during various processes and, therefore, there are different kinds of irrigation efficiencies, as given below: Hence, efficiency is inversely proportional to the losses. Input minus output is nothing but losses, and hence, if losses are more, output is es and, therefore, efficiency is less. Efficiency is the ratio of the water output to the water input, and is usually expressed as percentage.