Japan Geoscience Union Meeting 2019

Presentation information

[J] Poster

H (Human Geosciences ) » H-GG Geography

[H-GG02] Use, change, management of natural resources and environment: Interdisciplinary perspectives

Sun. May 26, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Yoshinori OTSUKI(Institute of Geography, Graduate School of Science, Tohoku University), Gen Ueda(Graduate School of Social Sciences, Hitotsubashi University), Takahisa Furuichi(Graduate School of Science, Hokkaido University), Toru Sasaki(Miyagi University of Education)

[HGG02-P05] Hydrogeomorphological and environmental geographical land condition of groundwater use areas along the coast of Lake Victoria, west Kenya

*Yoshinori OTSUKI1 (1.Institute of Geography, Graduate School of Science, Tohoku University)

Keywords:groundwater use, hydrogeomorphology, environmental geography, Lake Victoria, Kenya

The objectives of this presentation are to show and discuss about hydrogeomorphological and environmental geographical condition, supported groundwater resource used by drilled wells, of coastal areas of Lake Victoria, Kenya. Settlements in the areas are situated on the fluvial-colluvial lowlands and gentle slopes between the Rangwa composite caldera and the circular, outer Gwasi Hill, in the former Suba district (Homa Bay County).
The lowlands consist mainly of fluvio-colluvial deposits corresponding to principal aquifer, which has high permeability coefficient (1.0E-5 to 1.0E-6 m/s). In the vicinity of the groundwater observation points, water table depth exists 10 to 15 m below the current river bed (dissected valley bottom), approximately 25 m below the surface.
Environmental geographical conditions which are able to maintain the groundwater environment and use as described above will be shown in the presentation.