Distributed memory parallel computing of three-dimensional variable-density groundwater flow and salt transport

Fresh groundwater reserves, being of vital importance for more than a billion people living in the coastal zone, are threatened by saltwater intrusion due to anthropogenic activities and climate change. High resolution three-dimensional (3D), variable-density (VD), flow salt transport (FT) numerical models increasingly used support water managers decision makers their strategic planning measures dealing with problem fresh shortages. However, these computer typically require long runtimes large memory usage, making them impractical use without parallelization. Here, we parallelize SEAWAT, show that our parallelization 3D-VD-FT modeling is now feasible wide range hydrogeologists, since a) speedups two orders magnitude can be obtained as illustrated this paper, b) requirements far exceeding single machine memory.