Design, Supply and Install of Rainwater Harvesting Systems

How rainwater harvesting can be used in agriculture practices?

Rainwater harvesting is a great opportunity for many agricultural practices. From spraying and irrigation to livestock herd watering and event cleaning for farm machinery.

Because farm buildings typically have large roof areas, a huge amount of rainwater can be collected that usually goes to waste.

Large-scale water storage tanks with advance, environmentally friendly, treatment systems, can keep the water clean and fresh for up to 6 months. This means you can collect water and store it for times when you need it the most.

Due to rainwater being naturally soft, it is a preferred water source for both crops and livestock. Because of this, not only do you save money and increase profits, but you also have a supply of water with better quality.

The return on investment for rainwater harvesting systems is incredibly quick with averages being between 1 to 6 years. This makes rainwater harvesting a sound investment for many agricultural farms.

Key Benefits to Rainwater Harvesting:


  • Save Money on water bills
  • Applicable for Enhanced Capital Allowance
  • Fast return on investment (1 – 6 years average)
  • Up to 50% reduction in Water Run Off costs


  • Better chemical and feed conversions
  • Better for livestock drinkers and troughs
  • Better for spraying/irrigation – plants & animals prefer rainwater
  • As the rainwater is soft, overall, better for pipe work and machines


  • Goes towards environmental policies
  • Reduce flood risk with control & storage of water
  • Less Maintenance with no scale build up on equipment

Finance & Grant Opportunities for Agricultural Rainwater Harvesting

JRH Water Management can offer finance opportunities and support in applying for funding grants for agricultural rainwater harvesting.



Discover how much rainwater you could be collecting.

Uses of Rainwater Harvesting:

  • Spraying
  • Irrigation
  • Post Harvest
  • Livestock
  • Wash down
  • Drinking water (if treated & tested to correct standards)

Some of our installations


Rainwater harvesting system for spraying

Example breakdown: In 1 year we could fill their sprayer 320 times to provide enough water to spray 5333.3 hectares.

  • 600 sq m = roof surface area per side of barn to have 20,000 L tank per side
  • 1 inch rain = 25 mm x 600 sq m = 15,000 litres of water
  • So 33.5 mm rain will fill 1 tank = 33.5 mm x 600 sq m = 20,100 litres of water
  • 700 mm (average rain fall) divided by 33.5 mm (what it takes to fill a tank) = 20.89 times the tank will be filled in a year
  • Two tanks (20,000 each = 40,000) x 20 fills = 800,000 litres (total captured)
  • Divide this by 2,500 litre tank capacity of the sprayer = 320 sprayers OR 800,000 litres divided by 150 litres per hectare of water per application = 5333.3 ha of spraying


  • We covered half of the farm’s spraying needs.
  • Due to the weather, the tanks were kept full for some time, so the customer didn’t need mains water for spraying for a while.
  • The amount of water was 1.3 million litres for the year due to increased rainfall for the year.
  • The return on investment was 3 years.
  • Additional savings were also made:
    • In the purchase of chemicals due to better reactions from the use of natural water.
    • In the maintenance of sprayer.
    • ECA scheme claimed at end of year



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