Recently scholars have developed new techniques for combining the physical and economic analyses of complex resource systems (McKean 1958; Maass et al. 1962). The production function for a resource, representing relations between physical factors, and its benefit function, representing relations between economic factors, are believed to be so closely interrelated that they should be developed and analyzed synchronously. The methods of operations research and systems analysis make this possible [ see Operations research ; Planning, social , article on RESOURCE PLANNING ].
18 Earthjustice is fighting a series of legal battles related to various areas affected by the drought. Besides litigating against destructive fracking practices, the organization is fighting for strong protections of endangered fish species, and the renegotiation of long-term water contracts with corporate agriculture interests that were established under an inadequate and since-invalidated biological opinion. Earthjustice is also representing the grassroots organization Restore the Delta in ongoing hearings before California’s State Water Resources Control Board that will determine the future of the Twin Tunnels proposal .