1. General Model Information
Name: SHIELD 1.0 - Simulation of Hedgerows Intervention against Erosion and Land Degradation.
Main medium: terrestrial
Main subject: agriculture, hydrology, soil science
Organization level: ecosystem
Type of model: compartment model
Keywords: hedgerows, runoff, soil loss, maize yield, water-balance
Dr. P. Kiepe.
Grevingaheerd 166, 9737 ST Groningen, THE NETHERLANDS.
SHIELD calculates the effect of hedgerows on runoff, soil loss and maize yield. Crop growth simulation is based on and MAIZE*, but the water balance has been changed extensively. The amount of excess water runs off. Infiltration depends on management and is calculated with a set of algorithms that will be published shortly. Loss of soil is calculated through the calculation of the sediment concentration in runoff. Climatic data are read from the CABO/TPE Weather System* files, with inclusion of rainfall intensity data.
Purpose of the model:
Model parentage: SUCROS, MAIZE and MASQUE.
Source of the AbstractCAMASE Register of Agro-ecosystems Models
II. Technical Information
Operating System(s): IBM compatible PC/AT >= 640 Kb RAM.
Costs: : Not yet available.
Programming Language(s): FST*.
III. Mathematical Information
Rate variables: Crop specific variables (development, photosynthesis, maintenance, growth, evaporation, transpiration) and soil specific variables (infiltration, hydraulic conductivity, etc.).
State variables: Crop variables (grain weight, cob weight, biomass) and soil variables (water content, amount of water in the soil, drainage, runoff).
Slope, latitude, climatic data, crop species specific data (physiological and morphological) and soil data (infiltration, texture, soil organic matter content). Input check in model: No.
Maize yield, total runoff, total soil loss and any other rate or state variable desired.
Basic spatial unit: m2 - ha.
Time interval of simulation: 1 day.
Kiepe, P., 1995. No runoff, no soil loss: soil and water conservation in hedgerow barrier systems. Tropical Resource Management Papers 10, Wageningen. 156 pp.
V. Further information in the World-Wide-Web
VI. Additional remarks
Parentage: SUCROS, MAIZE and MASQUE
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