Grey Wolf Optimizer for estimating confined and leaky aquifers parameters from transient time-drawdown data

Abstract

The knowledge of aquifer parameters is important in many groundwater engineering applications. Usually, these parameters are poorly derived from time-drawdown data by manual curve matching. In this study, we propose an automatic approach for estimating confined and leaky aquifers parameters from time-drawdown data. We linked the Grey Wolf Optimizer (GWO) with two analytical drawdown solutions, the Theis solution for analyzing time-drawdown data coming from confined aquifers, and Hantush and Jacob solution for those coming from leaky aquifers. We tested the proposed approach on three time-drawdown datasets, and we compared the obtained results with those obtained by using the manual curve matching. The obtained results are accurate and exceed by far those obtained by using the manual curve matching