Solvers and Calibration Methods for Ground and Surface Water Models

摘要

The activities of this project are focused on (1) solving the nonsmooth nonlinear least squares problems that arise in the calibration of groundwater and surface water models, (2) nonlinear solvers for non-Darcy models of saturated groundwater flow, (3) continuation of previous work on solvers and preconditioners for unsaturated flow simulations. In the course of the project the PI and his students have completed work on non-Darcy flow models, graduating one student in the process, integrated proper orthogonal decomposition (POD) reduced order models into optimization problems for saturated flow using the ERDC three-dimensional ADH code, and published a large comparative study of optimization methods as applied to a suite of problems in subsurface flow and transport. One student has been hired by the US Army Corps of Engineers and is now completing his thesis while on the staff at ERDC.