Estimating the time lag between two hydrogeologic time series (e.g. precipitation and water levels in an aquifer) is of significance for a hydrogeologist-modeler. In this paper, we present a method to quantify such lags by adapting the visibility graph algorithm, which converts time series into a mathematical graph. We present simulation results to assess the performance of the method. We also illustrate the utility of our approach using a real world hydrogeologic dataset.
@article{arxiv.1702.01206,
title = {Adaptation of the visibility graph algorithm to find the time lag between hydrogeological time series},
author = {Rahul John and Majnu John},
journal= {arXiv preprint arXiv:1702.01206},
year = {2017}
}