ExampleA farmer grows 100 cows for milk and 1 ha of gherkins. It takes measures to eliminate leaks.

Expenses

BGN 92 / year are needed for repair of damaged drinking troughs, replacement of the running taps and replacement of part of the hoses for watering the cucumbers (labor and materials). The term of use is about 5 years, which makes BGN 460 for all 5 years.

Income

The water consumption of this farm is equal to: for the cows – 110 l / day x 365 days = 40 150 l / year x 100 cows

= 4,015 m3; for cucumbers – 1 ha at 4200 m3 / ha per year (at yield 40 000 kg / ha of cucumbers) = 4 200 m3, a total of 8 215 m3 x 1.0 BGN / m3 = 8 215 BGN / year. When the leaks are reduced by 10% of the water, the savings are equal to BGN 822 / year. Return

The return on investment is less than a year.