Derim (Jun 2020)
Determination of the irrigation water qualities in Muğla-Dalaman district and investigation of its seasonal changes
Abstract
This study was carried out to determine the irrigation water quality, and to investigate the seasonal changes of irrigation water in Muğla-Dalaman region. For this purpose, 3 locations (Kapıkargın, Gürköy and Atakent) were determined and 54 water samples were taken in October-November 2017 (1st period), February-March 2018 (2nd period) and May-June 2018 (3rd period). pH, EC, Ca+2, Mg+2, Na+, K+, CO3 -2, HCO3 -, Cl- and SO4 -2 analyzes were performed, sodium absorption rate (SAR) and Na% values were calculated. It was determined that the pH values of the samples ranged from 6.87 to 8.41; EC values from 523 to 7990 μS cm-1; SAR values from 0.09 to 12.37 me L-1; Na values from 1.58 to 56.58%; Cl- from 0.08 to 72 me L-1; SO4 contents from 0.38 to 29.38 me L-1 and RSC values from -51.32 to 29.38 me L-1. The pH values generally showed slightly alkaline and alkaline reactions; it was determined to classified as C2 (medium) and C3 (high) salinity, and EC values increased from 1st period to 3rd period. It was determined that SAR and Na values were in the 1st and 2nd class and decreased from 1st to 3rd period. When evaluated in terms of locations, it was seen that the most problematic location of the irrigation waters taken in terms of EC, SAR, Na%, Cl-, SO4 -2 was Kapıkargın. As a result, it was determined that most of the irrigation waters are problematic in terms of EC and should not be used in agricultural production, if necessary, necessary precautions should be taken, but they do not have any problems in terms of Na% and Cl-.
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