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International Institute for Aerospace Survey and Earth Sciences, Netherlands (2002)

Development of 3d conceptual hydrogeological model for Lake Naivasha area

Isah, Kiti Nabide

Titre : Development of 3d conceptual hydrogeological model for Lake Naivasha area

Auteur : Isah, Kiti Nabide

Etablissement de soutenance : International Institute for Aerospace Survey and Earth Sciences, Netherlands

Grade : Master of Science (MSc) 2002

Résumé
The aim of the study was to develop a 3-D conceptual Hydrogeological model on the basis of integration of geology, hydrochemistry, isotopic analysis, and boundary condition. The area of study is around lake Naivasha in Kenya Rift Valley where recent explosion in the economic activities has increased the demand for water and hence the necessity to understand the resource further for its better management. The general groundwater flow pattern in the study area is laterally towards the lake from the eastern and western escarpments and axially northwards and southwards away from the Lake. The gradient of change in water chemistry as water flows in the study is great and cannot be accounted for solely by ordinary dissolution of ions from the rocks along its flow path. There has also been a temporal deterioration of water quality especially in the Northeastern part of the area but it is neither related to yield nor to depth. Lacustrine sediments are thickest in the northeastern portion of the study area where their thickness is about 120m. Kinangop and Mau plateaus tilt away from the valley bottom. Consequently, rainfall on the plateaus plays minimal role in the regional groundwater recharge with respect to the Valley bottom. The model is still coarse and needs refinement as more information becomes available. It, however, give a general pattern of distribution of hydrogeological properties of the geological formation.

Sujets : Lake Naivasha, Kenya/Groundwater/Hydrology/Geology/ ;

Présentation

Page publiée le 28 janvier 2017, mise à jour le 16 octobre 2018