International Journal of Advances in Science, Engineering and Technology(IJASEAT)
current issues
Volume-8,Issue-3  ( Jul, 2020 )
Statistics report
Submitted Papers : 80
Accepted Papers : 10
Rejected Papers : 70
Acc. Perc : 12%
  Journal Paper

Paper Title
Emulator based Global Sensitivity Analysis of Apsim-Sugar Model: Emulator Accuracy Assessment

Global sensitivity analysis of process-based crop models is laborious and computationally expensive. Hence, the less computationally, expensive, and reliable approach is required. Gaussian Emulator Machine for Sensitivity Analysis (GEM-SA) use an emulator-based approach to conduct sensitivity analysis. Hence it is a computationally less expensive way to conduct global sensitivity analysis. It is tested with some process-based models, however rarely tested for crop models. This study aimed to assess the applicability of GEM-SA to conduct a sensitivity analysis of the APSIM crop model. Above-ground biomass, fresh cane yield, and sucrose weight of sugarcane were simulated for 300 input combinations using apsimr package of R 3.5 software. Thirty emulators (10 years x 3 outputs) were developed to estimate parameter sensitivity of 26 plant parameters using GEM-SA software. Results revealed that developed emulators are accurate. Hence the emulator-based approach is confident enough to conduct the sensitivity analysis of APSIM. GEM-SA provide a computationally less expensive and reliable platform to conduct a sensitivity analysis of the APSIM crop model. Keywords - Apsimr, Emulator, GEM-SA, Global Sensitivity Analysis, Sugarcane.

Author - Mhjp Gunarathna, Kazuhito Sakai, Mkn Kumari

| PDF |
Viewed - 13
| Published on 2019-08-14
IRAJ Other Journals
IJASEAT updates
Volume-8,Issue-1(Jan, 2020)
The Conference World