1. General Model Information
Main medium: terrestrial
Main subject: hydrology, agriculture
Organization level: population
Type of model: ordinary differential equations
Keywords: Evapotranspiration, transpiration, water stress, monteith equations, leaf water potential, stomatal response
Mr. Chr.R. Jensen.
The Royal Veterinary & Agricultural University, Department of Agricultural Sciences; Soil, Water and Plant Nutrition, 10, Agrovej, DK-2630 Taastrup, DENMARK.
Phone: +45.35.28 34 77 / 35.28 33 96
Fax: +45.35.28 21 75 / 35.28 35 74
DanStress integrates effects of soil crop and climatic conditions. Crop transpiration is calculated by Monteith's combination equation for vapour flow. Crop conductance is scaled up from an empirical stomatal conductance model. Transpirational water loss originates from root water uptake and changes in crop water storage. Pressure volume curves of leaves describe crop water storage and crop water relations. The root zone is separated into layers. Root water uptake is calculated by a single root model combined with a root contact model.
Source of the AbstractCAMASE Register of Agro-ecosystems Models
II. Technical Information
Operating System(s): PC IBM compatible min. 386. Contract necessary: Costs: : None. Comments:
Programming Language(s): Turbo Pascal version 5.0, Borland.
III. Mathematical Information
Rate variables: Root hydraulic conductivity, stomatal conductivity, drainage, capillary rise.
State variables: Crop water content, soil water content, structural leaf area, root density.
Rain, humidity, light, wind speed, temperature, pressure volume curves, crop conductance models.
Plant water status RWC, transpiration, crop conductance, soil water content.
Basic spatial unit: Field based.
Time interval of simulation: 10 minutes.
Jensen, C.R., H. Svendsen, M.N. Andersen & R. Losch, 1993. Use of the root contact concept, an empirical leaf conductance model and pressure-volume curves in simulating crop water relations. Plant and Soil 149: 1-26
V. Further information in the World-Wide-Web
VI. Additional remarks
Last review of this document by: T. Gabele: 22. 11. 1997
Status of the document:
last modified by
Joachim Benz Mon Jul 2 18:31:37 CEST 2007