DYMEX - APSIM

Modelling biotic constraints within the APSIM framework for a more detailed farming system analysis
Jeremy Whish and Neville Herrmann
Introduction Two modelling systems APSIM DYMEX Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 2
APSIM Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 3
How APSIM is used Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 4
Incorporating Population Models Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 5
The Inclusion of a Multi Cohort model Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 6
What is DYMEX
Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 7
What is DYMEX
Can handle many cohorts and sub daily time steps Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 8
DYMEX simulator wrapped in APSIM Module
Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 9
DYMEX-­‐APSIM link DYMEX
input variables From DYMEX
APSIM
Daily time step
sub daily time step
input variables From APSIM
Report DYMEX and APSIM outputs Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 10
How to build and link a model Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 11
How to build and link a model Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 12
How to build and link a model Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 13
Some results
5
Resistant
Moderately Resistant
Moderately Susceptible
Susceptible
Very Susceptible
Leaf area index
4
3
2
1
0
May
Jun
Jul
Jeremy Whish CSIRO Agriculture Toowoomba Aug
Sep
Oct
Nov
Slide No. 14
Some results
Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 15
Some results
Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 16
Future work Building better Disease models (leaf wetness) linking Root lesion Nematode model to affect plant water uptake. Jeremy Whish CSIRO Agriculture Toowoomba Slide No. 17
Thank You
Jeremy Whish CSIRO Agriculture Toowoomba Australia [email protected] Whish, J. P. M., Herrmann, N. I., White, N. A., Moore, A. D., & Kriticos, D. J. (press). Integrating pest population models with biophysical crop models to better represent the farming system. Environmental Modelling & Software.