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Model for Estimating Soil Water, Plant, and Atmospheric Interrelations: I. Description and Sensitivity
Author(s) -
Nimah M. N.,
Hanks R. J.
Publication year - 1973
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1973.03615995003700040018x
Subject(s) - evapotranspiration , environmental science , transpiration , water table , soil water , hydraulic conductivity , drainage , soil science , pressure head , water content , potential evaporation , water extraction , hydrology (agriculture) , water flow , water potential , dns root zone , water retention curve , limiting , extraction (chemistry) , groundwater , chemistry , geology , ecology , geotechnical engineering , engineering , chromatography , biology , mechanical engineering , biochemistry , photosynthesis
A model and its numerical solution were developed to predict water content profiles, evapotranspiration, water flow from or to the water table, root extraction, and root water potential under transient field conditions. Soil properties needed are hydraulic conductivity and soil water potential as functions of water content. Plant properties needed are rooting depth and limiting root water potential. Climatic properties needed are potential evaporation and potential transpiration. The model predicted significant changes in root extraction, evapotranspiration, and drainage due to the variations in pressure head‐water content relations and root depth. Variations in the limiting root water potential had a small influence on estimated evapotranspiration, drainage, and root extraction.