MODELING THE UPTAKE OF SOIL WATER BY PLANTS
Loading...
Date
1975
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
UNIVERSITY OF AGRICULTURAL SCIENCES, BANGALORE
Abstract
Current methods of estimating watershed evapotranspiration for hydrologic simulation use an estimate potential evapotranspiration that is reduced as a function of soil dryness. Methods are needed for estimating evapotransporation which are based on the physics and physiology of evapotranspiration. This study was undertaken to develop and evaluate a model to quantify transpiration which incorporates the interaction of plant growth and soil water depletion on transpiration.The model consist of two principal parts. The first, referred to as a micromodel, models the flow of water from the soil to the root and is directly coupled to a steady state plant model which moves water from the root to the leaf. The second part is referred to as a micromodel and accounts for water movement within the bulk soil due to gradients in water potentials. The micromodel is used to estimate transpiration. The flow relationships in the models are nonlinear, second order, partial differential equations of the parabolic type and are solved using numerical techniques.
Description
Keywords
null
Citation
No. Of references 91