We need to feed us and to produce our food we need to consume a large amount of water clean and unsalted. The global demand for water resources is set to increase by 40 percent in the next 20 years alone and is expected by 2050, the demand for foods it will grow by 70 percent. How progress can reach developing countries if there seems to be an inevitable on the horizon water crisis? The solution, once again, lies insustainable agriculture with more use efficient water resources.
L'water plays an essential role in the life of each of us and also plays a leading role in various industrial sectors, includingagriculture. According to data released by the European Environment Agency, one third ofwater consumed in the old continent is used by agricultural sector. Also in Europe, the use of pesticides, fertilizers andsoil pollution, are the main causes of Drought.
L'agriculture could make significant gains in terms of water efficiency starting fromcrop irrigation. In countries such as Greece, Italy, Portugal, Cyprus, Spain and southern France, the conditions arid or semi-arid soil, require frequent irrigation. In these localities, almost 80 percent ofwater used in agriculture is exploited for irrigation. Yet theirrigation should not require such a large amount ofwater: intelligent irrigation techniques allow you to use only thewater really necessary for the needs of cultivation. In Greece, for example, by supplanting the traditional irrigation method with the more modern ones, an effective gain of water 95 percent off.
In Europe, thanks to agricultural subsidies assigned through the CAP (EU Common Agricultural Policy), the use of irrigation more efficient. In the province of Cordoba (Spain), for example, a modernization of the irrigation system of a cotton plantation has led to a water saving of 40 percent, the modernization was implemented after a partial grant. An example of excellence was also seen in Italy, in Tavarnella Val di Pesa, in the province of Florence.
Consumption ofWater in Agriculture, the solutions
The first solution is clear and consists in the development of increasingly efficient and root-targeted irrigation systems, but efficiency is not the only way. Across the reuse of waste water, L'agriculture could have a environmental impact less harmful - in water terms -. The use of waste water inagriculture it is already widespread in some locations around the globe. In Cyprus, a large part of the water needs ofagriculture is satisfied with recycled wastewater. In the Gran Canaria archipelago, in Spain, 20 percent ofwater used in all industries, it comes from waste water regenerated, in agriculture these manage to irrigate 5,000 hectares of land planted with tomatoes and 2,500 hectares of banana plantations.