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Organization of remedial programs for contaminated ground-water supply systems: Deterministic and stochastic analysis. Final report

Technical Report ·
OSTI ID:5267885
;
A numerically efficient procedure is developed for computing optimal time-varying pumping rates for remediation of contaminated groundwater aquifers described by two-dimensional numerical models. The management model combines a pollutant transport model with a constrained optimal control algorithm. The transport model simulates the unsteady fluid flow and transient contaminant dispersion/advection in a two-dimensional confined aquifer. A Gelaerkin's finite element method and full implicit finite difference scheme is applied to solve the groundwater flow and contaminant transport equations. The constrained optimal control algorithm employs a hydperbolic penalty function. Several sample problems covering five to fifteen years of remediation are given to illustrate the capability of the management model to solve a groundwater quality control problem with a time-varying pumping policy and water-quality constraints. Previous applications of nonlinear optimization methods to two-dimensional groundwater remediation have only considered constant pumping rates are 75% more expensive than the optimal time-varying pumping rates, a result that supports the need to develop numerically efficient optimal control-finite element algorithms for groundwater remediation.
Research Organization:
Cornell Univ., Ithaca, NY (United States). School of Civil and Environmental Engineering
OSTI ID:
5267885
Report Number(s):
PB-91-223636/XAB; CNN: DI-14-08-0001-G-1287
Country of Publication:
United States
Language:
English

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Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ALGORITHMS
AQUIFERS
CONTAMINATION
ENVIRONMENTAL TRANSPORT
GROUND WATER
HYDROGEN COMPOUNDS
MASS TRANSFER
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
POLLUTION
REMEDIAL ACTION
STOCHASTIC PROCESSES
TWO-DIMENSIONAL CALCULATIONS
WATER
WATER POLLUTION
WATER SUPPLY