Steady-state three-dimensional flow simulation in a volcanic-sedimentary aquifer

Abstract

In this study, a groundwater flow model of this aquifer is developed. The model simulates an average steadystate condition for the year 1992, when an extensive field study was undertaken, in which 238 wells were visited in the study area. The model simulates groundwater flow over an area of about 44 km2 with 190 rows, 201 columns and three layers. Based on the modelling results, the model reproduces the observed flow–field and the water balance components rather well. The model presents numeric stability problems due to the steep topography of the area that constitutes a determining factor.