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DAISY
Soil Plant Atmosphere System Model
Technical Description
Editors: M.E. Styczen, P. Abrahamsen, M. Holbak and E. Diamantopoulos
List of content
1. System and modelling concepts
2. Weather and reference ET
3. Surface processes
4. Water flow in soils
5. Heat transport
6. Solute transport
7. Mineral Nitrogen
8. Pesticide transport
9. Soil organic matter model
10. Crop model
11. System management model
12. Integrated model
Appendices
Chapter 2.
2.1 Optional implementations of reference evapotranspiration and the PM-models
2.2 Net radiation model implementations
2.3 Bioclimate parameterisations
2.4 SSOC-SVAT model
Chapter 3.
3.3 Alignment of Daisy with FOCUS recommendations
Chapter 4.
4.1 Additional hydraulic functions available in Daisy
4.2 Options for calculation of equivalent depth in Hooghoudt’s equation
Chapter 5.
5.1 Program for deriving lower boundary conditions for heat calculations
Chapter 9.
9.1 The BIOMOD model and clay dependency
9.2 Sensitivity analysis describing challenges of initialization of OM-pools
9.3 Initialization of SOC pools
Chapter 10.
10.1 Calculation of Day Length
10.2 Estimating the root density from root dry matter and size
10.3 The stomata-photosynthesis model and the sunlit-shadow radiation model in Daisy
References
- Abrahamsen, P and Hansen, S. (2000): Daisy: an open soil-crop-atmosphere system model. Environmental Modelling & Software 15: 313-330.
- Hansen, S., Abrahamsen, P., Petersen, C.T., and Styczen, M. (2012). Daisy: Model use, calibration and validation. ASABE 55 (4): 1315-1333.
- Hansen, S., Jensen, H.E., Nielsen, N.E. and Svendsen, H. (1991). Simulation of nitrogen dynamics and biomass production in winter wheat using the Danish simulation model DAISY. Fertilizer Research 27: 245-259, 1991.