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Golf courses that reuse water irrigate too much
Date:3/15/2011

treated water

The quality of the water used to irrigate golf courses has improved a great deal since the 1970s. It is also "recommendable" that those that are able and that suffer from salinity problems reuse desalinated water for maintenance purposes. In fact, "permission is not given for new courses if they cannot show that the water used to irrigate them will be reclaimed", the expert explains.

The Royal Golf Club of Las Palmas is irrigated with water that has been desalinated, consumed by the public, treated and once again desalinated before being recycled for reuse. However, "the combination of water with low salinity and a high proportion of exchangeable sodium (which is common in desalinated regenerated water) can have a negative impact on the structural stability of soil, which loses fertility over the medium term because of losing its capacity to drain away water", the researcher says.

To this must be added the possible long-term effects of using it for cultivated plants, the irrigation system and the water of the aquifer. The scientists say it is not only the quality of the water used that could harm the condition of the soil and the aquifer, but "the frequency and amount of the recycled water used in irrigation".

"It is assumed that the consequences only depend on the quality of the water, when in fact the other factors normally have a greater influence", says Palacios Daz in this study, which is part of the TRAGUA project on Water Treatment and Recycling for sustainable management.

In relation to the negative long-term impacts of the excessive use of desalinated reclaimed water, the researchers propose "adapting the species and varieties watered, instead choosing types that are more tolerant of salinity and thereby reducing the cleaning requirements. Paradoxically, this adaptation has been implemented at the golf course studied, but the amount of water used has not been reduced", explains the scientist.<
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info@plataformasinc.es
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

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