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Iron Levels on Wells, Its Effect and Management on Drip Irrigation Systems

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Pp. 281-282 in Preferential Flow, Water Movement and Chemical Transport in the Environment, Proc. 2nd Int. Symp. (3-5 January 2001, Honolulu, Hawaii, USA), eds. D. D. Bosch and K. W. King. St. Joseph, Michigan: ASAE  701P0006.(doi:10.13031/2013.2121)
Authors:   Pannunzio Alejandro, Garibolgio Miguel, Patiño Eduardo, Casas Guillermo
Keywords:   drip irrigation, iron clogging, filtration

Trickle irrigation is generating in Dragones, Salta, Argentina, the possibility of incorporating land to intensive agriculture, reaching high yields with the use of surface water in an efficient way. Even when wells produce measured flows higher than 400 m3/h, iron contents in the water cause important damages if they are not adequately treated. Oxidation of the iron at the outlets of the drippers causes clogging troubles. Muriatic Acid (HCI) has been utilized, injected into the system through its fertigation system, in order to remove incrustations, restoring the original volumes at the drippers. This was made instead of the classic method, which consists of the oxidation, decantation and later repumping and separation of the remainings through gravel filters, thus increasing efficiency in the use of water since it prevents losses by infiltration and evaporation at the pools' level like in the classic method, also saving energy since repumping is not required here. The acid is obtained at Ledesma, Jujuy province, close to Salta, at prices compatible with its use for this purpose. Volume of the drippers was tested after treatment and original volumes were found.

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