Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Surface water - groundwater interaction. Lake Naivasha, Kenya

Auteur : Abdulahi, Behar Hussein

Etablissement de soutenance : International Institute for Geo-information Science and Earth observation (ITC)

Grade : Master of Science in Natural Recourse Management (NRM) 1999

Résumé
With growing economic development, the demand for groundwater increases. There is thus the necessity to study the change in groundwater storage and the interaction between groundwater and surface water, on a longer term. This study addresses both issues. By comparing the groundwater tables observed in wells with the lake level data, the direction of flow is established. Generally speaking, the lake was losing water to the aquifer at a rate of about 55 million-cubic meters per annum, over a period of 1958 to date. To quantify the change in groundwater storage of the aquifer in response to fluctuating Lake Levels, modelling is carried out using PMWIN. This model has a capability of optimizing different aquifer parameters like transmissivity and storage coefficient, which are used to quantify the storage change. The change in groundwater storage was insignificant, accounting for 0.1% of the lake storage change

Version intégrale