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This farm has combined three sources of water to ensure availability. In 1990, they started using high salinity mine water thanks to a reverse osmosis desalination plant.
In 2000 they built a dam on a stream running through their farm, with a sediment pond and a storage pond (45 million litres).
In 2008 they joined a community of irrigators that pumps water from the Guadalquivir to a reservoir since they are also beneficiaries of that water.
The drippers are inserted in a circular pipe around the tree, with several integrated drippers, a very suitable system for their soil for better use by the plant.
The aim was to have available water enough to convert the management system from rainfed to irrigated, guaranteeing sufficient water supply in the future to irrigate the entire farm.
Thus, the irrigation system has tried to prioritise efficiency through drip irrigation, with integrated drippers.
In the beginning, they had 30 ha of rainfed olive groves and a mining well with salt water at their disposal. They therefore installed a reverse osmosis desalination plant.
As they grew to 70 ha, their water needs increased, and they looked for less energy-demanding systems; they built a dam on the farm and later joined the irrigation community.
They have provided them with consultancy services with technical studies implementation of the desalination plant, calculations for the construction of the ponds and installation services for the equipment and pumps.
The irrigation community, which has allowed them to jointly undertake the works for the transfer and pumping of water.
The desalination plant required a piston pump to enable reverse osmosis at pressures of over 60 bar, with very high energy consumption.
The cofferdam required land clearing to enable a capacity of more than 45 million litres, the base of which was waterproofed with polyethylene.
The Irrigation community required 9 km of piping to bring the water from the Guadalquivir and pumps capable of filling the pond from which 2000 ha are irrigated.
The use of a desalination plant is not so common as in coastal zones for domestic supply or for irrigation of horticultural crops.
The community constitution to undertake investments and improve the use of the resource is another form of social innovation and financing.
The first success factor is to make decisions and undertake improvements to overcome the limitations of the farm.
To have financial resources available to undertake the measures described above, adapting the improvements to their financial capacity.
Climatic conditions are limiting, with low rainfall and extremely hot summers.
In addition to the scarcity of water, the available groundwater contains high levels of salinity, rich in chlorides.
The orography of the estate makes tillage difficult.
The financial requirements for the measures have been significant.
Certain technologies such as the desalination plant have become obsolete; there is now more energy-efficient equipment, smaller in size and with a higher daily filtration capacity.
With dedication and effort, they have sought solutions to most of the above constraints, trying to ensure the availability of quality water.
Maybe in the future, they can transform energy sources towards sustainable solar-based systems.
When facing constraints, solutions can always be found. It will depend on economic or legal factors, but it is possible to find innovative ways to achieve a goal.
The availability and adequacy of resources to these objectives is fundamental, and associative solutions should always be considered as a response.
Efficient use of water through drip irrigation systems. They use bands with integrated drippers (2.4 l/h), with a flow per tree of 16 l/h and an annual allowance per hectare of 1500 m3. Multiple emitters per tree allow a larger wet area and better water availability for the plant.
The system allows the use of much lower water allocations than those required by other crops or less efficient irrigation systems.
AGRIWATER project has been funded with the support from the European Commission, with the reference number 2020-1-CZ01-KA204-078212. The content of this website reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.
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