Volume 23, Issue 3 (Fall 2019)                   2019, 23(3): 53-63 | Back to browse issues page

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Karimi Avargani H, Rahimikhoob A, Nazarifar M H. Sensitivity Analysis of Aquacrop Model for Barley in Pakdasht Region. JWSS - Isfahan University of Technology 2019; 23 (3) :53-63
URL: http://jstnar.iut.ac.ir/article-1-3672-en.html
1. Irrigation and Drainage Engineering Department, Aburaihan College, University of Tehran, Tehran, Iran. , akhob@ut.ac.ir
Abstract:   (3466 Views)
In recent years, a lot of research has been done on the Aquacrop model, the results show that this model simulates the product performance for deficit irrigation conditions. But this model, like other models, is sensitive to values of independent variables (model inputs). In this research, the sensitivity of the Aquacrop model was analyzed for 4 input parameters of reference evapotranspiration, normalized water productivity, initial canopy cover percentage and maximum canopy cover for barley. Irrigation treatments included full irrigation and two deficit irrigation treatments of 80% and 60%, the experiment was done in 2014-15 growing season in the field of Abourihan College. The values of measured biomass were used as the base values for treatments. The Beven’s method (Beven et al., 1979) was used for sensitivity analysis of Aquacrop model. The results showed that the model is most sensitive to the reference crop evapotranspiration, So the sensitivity coefficient for this parameter for full irrigation treatments, 80% full irrigation and 60% full irrigation were -1.1, -1.2 and -2.3 respectively. The negative sign indicates that if the value of reference evapotranspiration input is exceeded the actual value into the model, Yield performance is simulated less than actual value. In the meantime, the higher the degree of deficit irrigation, the greater the sensitivity of the model.
Full-Text [PDF 497 kb]   (740 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2018/02/21 | Accepted: 2018/10/7 | Published: 2019/12/23

Add your comments about this article : Your username or Email:

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2023 CC BY-NC 4.0 | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb