Funnel-and-Gate Design Method
Abstract
The funnel/gate' system is a developing technology for passive groundwater plume management and treatment. This technology uses impermeable funnel walls to force polluted groundwater through a highly permeable zone of reactive porous media, the gate', where contaminants are degraded by biotic or abiotic heterogeneous reactions. The purpose of this study is to first develop and demonstrate analytical flow and fate/transport models for funnel/gate systems, and second, to develop and demonstrate a minimum cost design model. A series of equations which constitute an analytical, multi-contaminant, degradation and transport model have been developed. From an existing analytical hydraulic model for funnel/gate systems developed by Christensen and Hatfield (1994), an iterative design algorithm was developed for dimensioning a funnel/gate system. A funnel/gate cost estimation model with a Lagrangian optimization model was also developed to identify minimum cost designs subject to four constraints: one that defines the desired hydraulic retention time in the gate, one that defines the funnel wall length in terms of other system dimensions, and two that serve as hydraulic constraints. Finally a computer program was developed to demonstrate the theory that was developed. The Funnel/Gate Design Model (FGDM) software is a FORTRAN program developed to ascertain feasible dimensions of funnel/gate systems and also identify the lowest cost design.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1997
- Accession Number
- ADA356128
Entities
People
- Kirk Hatfield
Organizations
- Applied Research Associates (United States)