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Universiteit Gent (2010)

Quality assessment of hot spring water for irrigation and domestic use in Malawi

Kanyangalazi Joseph Jones

Titre : Quality assessment of hot spring water for irrigation and domestic use in Malawi

Auteur : Kanyangalazi Joseph Jones

Université de soutenance : Universiteit Gent

Grade : Master of Science (MS) Physical Land Resources 2010

Résumé
With the current climate change, water scarcity/availability has become a major issue for irrigation and domestic purposes. As such people are forced to turn to alternative sources like hot springs. Malawi is endowed with massive hot springs, albeit this resource has not been fully tapped to improve the livelihood of the rural poor. As such, no well known study has been done to evaluate the quality of hot spring water for various uses. The goal of this study was to evaluate the suitability of hot spring water for irrigation and domestic purposes in Malawi. Four representative hot springs (Mphizi, Tambala, Kumpalira 1 and Namitukuta) were selected for the study and a physico-chemcal analysis was made on the evaporites of the samples. Results revealed that burkeite, halite, kogarkoite and trona are the major salts present in all the samples. Tambala hot spring, in addition, was found to contain thernadite. Water quality analysis, based on SAR values, indicated that all samples contained high SAR values (ranging from 217 to 651 ppm) making them unsuitable for irrigation purposes. Suitability analysis for drinking purposes also revealed that the water from all hot springs is not suitable (according to WHO standards) due to the high concentrations of F- (ranging from 6 to 14 ppm). Use of these hot springs for drinking purposes without appropriate treatment (defluoridation) could have serious health risks

Source : Pedon 22 - Physical Land Resources - Universiteit Gent

Page publiée le 2 janvier 2016, mise à jour le 24 janvier 2018