1. General Model Information

Name: SIBQUICK - Simulation Balance QUICK.


Main medium: terrestrial
Main subject: agriculture
Organization level: ecosystem, population
Type of model: compartment model
Main application:
Keywords: crop, soil, root-soil-interactions, water dynamics, crop growth, penetration resistance


MSci H.T.C. Simota.
Research Institute of Soil Science and Agro-chemistry (RISSA), Dept. of Soil Physics, Blvd. Marasti 61, R-71331 Bucharest, ROMANIA.
Phone: +40.1.2225979
Fax: +40.1.2225979
email: icpa@u1.ici.ro



The model describes dynamics of the crop available soil water and the crop yield formation. The production system is defined by crop species, soil type, hydrologic conditions and weather during the growing season. The SIBQUICK model is designated for calculating the effect of soil water balance and soil mechanical resistance on agricultural production potential for selected crop-soil-climate combinations. The model allows to evaluate the relative importance of principal soil physical properties to crop production. The dynamics of the root system is related to soil water content and soil resistance to penetration. The crop available soil water is estimated on a daily base using a general balance algorithm for the root zone. The root zone is considered as one vessel having soil water retention properties given by a weighted average over the soil layers included in this zone. The biomass production algorithm uses the water use efficiency. As optional tools are included a weather daily data generator (using monthly averages of air temperature and precipitation), an algorithm for the evaluation of the pedotransfer functions using soil data obtained in simple soil survey studies (texture, bulk density, organic carbon).

Purpose of the model:

Model parentage: SIBQUICK uses algorithms developed in ARIDCROP model.

Source of the AbstractCAMASE Register of Agro-ecosystems Models

II. Technical Information

II.1 Executables:

Operating System(s): IBM-PC compatible with a 286 processor or better, math co-processor is highly recommended.
Contract necessary:
Costs: : None.

II.2 Source-code:

Programming Language(s): QuickBasic.

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

Rate variables: Potential / actual evaporation and transpiration, actual infiltration rate, runoff, drainage.

State variables: Air temperature, crop available soil water, soil resistance, dry matter (total and per plant organ), water use efficiency, cumulated transpiration deficit, root front depth.

III.2.1 Input

Soil physical properties per layer, standard meteorological variables, qualitative index for the initial soil water content, crop type and cultivar, sawing date and depth. Input check in model: No.

III.2.2 Output

Crop available water dynamics, biomass per plant organs, crop yield, root system development, water balance elements (evaporation, transpiration, drainage, runoff).
Basic spatial unit: Ha.
Time interval of simulation: 1 Day.

IV. References

Simota, C., 1994. SIBQUICK - a fast simulation model for crop yield formation as affected by soil water availability. RISSA internal report. 40 pp.

V. Further information in the World-Wide-Web

  • VI. Additional remarks

    Parentage: SIBQUICK uses algorithms developed in ARIDCROP model.
    Last review of this document by: T. Gabele: Dec 10 1997
    Status of the document:
    last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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