1. General Model Information

Name: WASTEN - A model for nitrogen behaviour in soils irrigated with liquid waste.

Acronym: WASTEN


Main medium: terrestrial
Main subject: biogeochemistry, agriculture
Organization level: ecosystem
Type of model: ordinary differential equations
Main application:
Keywords: Soil science: nitrate contamination.

Contact:

Dr. H.M. Selim.
Louisiana State University, Agricultural Center, Louisiana Agricultural Experiment Station, Department of Agronomy, 104 Madison. B. Sturgis Hall, Baton Rouge, LA 70803-2110 UNITED STATES.
Phone: +1.504.388 2110
Fax: +1.504.388 1403
email: xp2469@lsuvm.sncc.lsu.edu

Author(s):

Abstract:

This mechanistic model was developed to describe the N behaviour in land treatment systems as affected by physical, chemical and biological processes and environmental conditions. The model is also capable of describing the fate of N in the soil profile during the growing season of agricultural crops. The region considered is a one-dimensional homogeneous or multi-layered (stratified) soil profile bounded at some depth by an impervious layer, a water table, or extends to a great depth.

Source of the AbstractCAMASE Register of Agro-ecosystems Models


II. Technical Information

II.1 Executables:

Operating System(s): Operational on IBM mainframe or other computer systems and PCs.
Contract necessary:
Costs: : None.
Comments:

II.2 Source-code:

Programming Language(s): Microsoft FORTRAN.

II.3 Manuals:


Selim, H.M. & I.K. Iskandar, 1980. Simplified model for prediction of nitrogen behavior in land treatment of wastewater. USA Cold Regions Research and Engineering Laboratory, CRREL Report 80-12.


II.4 Data:



III. Mathematical Information


III.1 Mathematics


III.2 Quantities

State variables: N model (N uptake, transformations and transport of N species), water flow model (wastewater infiltration, water movement, plant uptake) and subroutines (initial and boundary conditions, plant root distribution, soil water properties, and nitrogen transformation processes (ion-exchange, (de-)nitrification)).

III.2.1 Input

Layers, rate coefficients, soil properties. Input check in model: No.

III.2.2 Output

Concentration profiles with depth and time.
Basic spatial unit: Variable.
Time interval of simulation: Variable.

IV. References


Reynolds, C.M. & I.K. Iskandar, 1995. A modeling-based evaluation of the effect of wastewater application practices on groundwater quality. CRREL Report 95-2. USA Cold Regions Research and Engineering Laboratory, Hanover, NH 03755-1290

Selim, H.M. & E. Segall, 1981. WASTEN: A model for nitrogen behaviour in soils irrigated with liquid waste. In: Frissel M.J. & J.A. van Veen (ed.). Simulation of nitrogen behaviour of soil-plant systems. Papers of a workshop. Models for the behaviour of nitrogen in soil and uptake by plant. Comparison between different approaches Wageningen, January 28-February 1, 1980. 96-108

Selim, H.M. & I.K. Iskandar, 1980. Simplified model for prediction of nitrogen behavior in land treatment of wastewater. USA Cold Regions Research and Engineering Laboratory, CRREL Report 80-12.


V. Further information in the World-Wide-Web


  • VI. Additional remarks

    Parentage: -
    Last review of this document by: T. Gabele: Dec 15 1997
    Status of the document:
    last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

    Go back to Register of Ecological Models (R E M)