TITLE:
Integrated Numerical Simulation of Water Resources in Crystalline Aquifers at Koué Watershed Scale (Western Côte d’Ivoire)
AUTHORS:
Vincent T. Assoma, Martial Z. Konan, Christian G. Adon, Fernand K. Kouamé
KEYWORDS:
Crystalline Aquifer, Hydrogeological Modelling, HydroGeoSphere, Water Resource, Koué Watershed, Côte d’Ivoire
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.7 No.7,
July
30,
2019
ABSTRACT: The present work applied the HydroGeoSphere (HGS) model in humid tropical area to Koué watershed scale to simulate
flows in porous and fractured area of crystalline aquifers. It integrates
rainfall, physiographic, fractures, hydraulic drilling and hydrodynamic data.
The simulation of flows in porous area concerned 5 test zones. The input database
of the model is implemented on a triangular grid in porous area using
Gridbuilder software and interactive block grid in fractured area. In order to
use the model in these two environments, boundary condition was set. The
infiltrations rate of the earth layers is estimated in the order to 10-5 ms-1. The model
simulates the pumping with a good reproductivity of the drawdown profiles of
groundwater at the drillings. The storage coefficients vary between 9.9 × 10-4 and 2 × 10-3. The
hydraulic conductivities vary from 8.5 × 10-6 to 2 × 10-5. 73.9% of the drillings studied has a high hydraulic
conductivity and shows a strong drawdown of the groundwater table. The study of
the static levels of the ground water allowed indicating the distribution of
the water resources in the drillings: 57% are deep in the first 10 meters, 36%
between 10 and 20 m, and 7% in the higher level to 20 m deep in the earth.