Accession Number : ADP004680

Title :   A Discussion and Description of the General Equilibrium Model (GEM),

Corporate Author : ARMY ENGINEER INST FOR WATER RESOURCES FORT BELVOIR VA

Personal Author(s) : Crew,J.

Report Date : FEB 1985

Pagination or Media Count : 8

Abstract : The general problem to be solved in navigation modelling can be summarized as follows: For all waterway movements select those which reflect the best utilization of the system (i.e. maximize benefits) given that any individual movement has associated benefits in the form of reduced transportation costs and associated costs in the form of lock delays. GEM uses pricing convention that accurately describes the marginal contribution of each movement to system benefits, by ensuring that each solution of the iterative process is feasible. GEM finds those combinations of prospective movements that satisfy the constraints (locks) of the general problem and then searches through these alternative feasible solutions to obtain the optimal solution that maximizes benefits.

Descriptors :   *ECONOMIC MODELS, *INLAND WATERWAYS, WATER TRAFFIC, LOCKS(WATERWAYS), TOPOLOGY, EQUILIBRIUM(GENERAL), BENEFITS, OPTIMIZATION, ALGORITHMS

Distribution Statement : APPROVED FOR PUBLIC RELEASE