The analyses of water resource systems and the application of mathematical statistics and operations research in the planning, operation, and management of water resource developments are continuing. Systems analyses as a tool of the hydrologist and water resource engineer are coming of age in the United States. In addition to the use of these techniques in analyzing and synthesizing physical systems, significant inputs are being made to broaden the analysis to social, economic, and environmental considerations.
Water resource systems analysis has come to mean the use of mathematical programing and simulation techniques in the study of large-scale systems which control the movement of water on and under the surface of the earth. Included in the discussion which follows will be a review of surface water systems, groundwater systems, water quality systems, stochastic flow models, decision theory, and network theory.