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Accueil du site → Master → Pays Bas → 2014 → Spatial assessment of water types using multiple tracers in the Mara River basin , Kenya.

UNESCO-IHE Institute for Water Education, Delft (2014)

Spatial assessment of water types using multiple tracers in the Mara River basin , Kenya.

Lilande, A.S.

Titre : Spatial assessment of water types using multiple tracers in the Mara River basin , Kenya.

Auteur : Lilande, A.S.

Université de soutenance : UNESCO-IHE Institute for Water Education, Delft

Grade : Master of Science (MS) 2014

Résumé partiel
The Mara River Basin is important not only to the inhabitants of the basin but also to the whole country as it encompasses the Maasai Mara game reserve which earns revenue to the government through tourism. The geology of the area is mainly composed of tertiary and quaternary volcanic deposits of Cenozoic era with the oldest formations being in the Archeozoic era. The rich volcanic soils with bimodal rainfall favours the production of agricultural crops throughout the year most especially tea and maize. Land use pattern has been changing since the early 70’s with increasing population resulting into increased conversion of forest land into agricultural and settlement areas especially in the upstream Mau Escarpment. Hydrochemical components and environmental stable isotopes of oxygen and deuterium were used for the characterization of the water types ofthe Mara River Basin. The study also provided an opportunity to understand processes controlling the groundwater and surface water chemistry. A total of 157 samples were collected of which 28 were from shallow wells, 26 from springs, 5 from deep boreholes and the restfrom the main Mara River and its tributaries. Measurements were conducted both in the field and in the laboratory to identify the major anions and cations present in these sources. Use of statistical analysis, piper diagram, chemical computations and graphical representation of the results has been used for the interpretation of the chemical and isotope data. From the statistical analysis carried out, results indicate that there is no significant difference between the chemistry of river water and that of shallow wells at 95% confidence level.

Sujets  : river basins isotopes land use Water chemistry Kenya

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Page publiée le 6 avril 2021