Record Display for the EPA National Library Catalog

RECORD NUMBER: 17 OF 148

OLS Field Name OLS Field Data
Main Title CTSPAC: Mathematical Model for Coupled Transport of Water, Solutes, and Heat in the Soil-Plant-Atmosphere Continuum. Volume 1. Mathematical Theory and Transport Concepts.
Author Lindstrom, F. T. ; Cawlfield, D. E. ; Boersma, L. ;
CORP Author Oregon State Univ., Corvallis. Dept. of Soil Science.;Corvallis Environmental Research Lab., OR.
Year Published 1988
Report Number EPA-R-814060; EPA/600/3-88/030;
Stock Number PB88-238316
Additional Subjects Soil mechanics ; Plant metabolism ; Mathematical models ; Solutes ; Transport equations ; Nutrients ; Contaminants ; Water pollution control
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB88-238316 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 12/29/1988
Collation 150p
Abstract
The mathematical structure of the model consists of the coupling of a model for the transport through soils to a model for transport through plants. The coupled model describes uptake of water and solutes by plants from the soil solution. The rate of uptake is a function of the environmental conditions that determine the transpiration rate. Transport of water, solutes, and heat through the soil is modeled by a one-dimensional approach. The soil is divided into a series of depth increments. Initial root distribution is specified. Water and solutes are taken from each soil layer as determined by water potential. Water transport in the plant is based on water potential and pressure gradients according to the Munch pressure flow hypothesis. Gradients are determined by water availability in the soil and by atmospheric conditions. The model was developed for the specific purpose of making assessments of risks involved in the use of xenobiotic chemicals. It is driven by environmental conditions, specifically atmospheric conditions that determine transpiration rate.