Modeling cherry orchard evapotranspiration based on an improved dual-source model

Xianyue Li, Peiling Yang, Shumei Ren, Yunkai Li, Honglu Liu, Jun Du, Pingfeng Li, Caiyuan Wang and Liang Ren

Agricultural Water Management, 2010, vol. 98, issue 1, 12-18

Abstract: The partitioning of canopy transpiration (Ec) and soil evaporation (Es) is often important to estimate evapotranspiration for hydrologic, ecologic, forest, and agricultural applications. Although Shuttleworth-Wallace (SW) model can estimate the partitioning of Ec and Es, some parameters due to the complicated model structure are not easily obtained. Therefore, this has limited the further development of SW model. In this study, an improved dual-source model (SSW) was proposed for ET estimation. This simpler model structure with less parameters than SW model can estimate Ec and Es, separately, and only requires conventional meteorological data. The estimations of Ec and Es for the observation period were consistent with the data measured from sap flow and micro-lysimeter, respectively, in a commercial cherry orchard in Beijing, China. Also daily ET estimated from the SSW, SW, and Penman-Monteith (PM) model were compared and analyzed. The results showed there was a small difference between SSW and SW model, but their accuracy were both higher than PM model's, and the root mean square error (RMSE) was 0.641, 0.613 and 0.955 mm/day, respectively. Sensitivity analysis for SSW model showed that the variation of ET was less than 2% when parameters varied in the range of ±20%. So, the SSW model is not only simple but also high accurate and stable, and it appears suitable to estimate cherry orchard ET.

Keywords: Evapotranspiration; Separate; estimation; Improved; dual-source; model; Cherry (search for similar items in EconPapers)
Date: 2010
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378-3774(10)00250-7
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:98:y:2010:i:1:p:12-18

Access Statistics for this article

Agricultural Water Management is currently edited by B.E. Clothier, W. Dierickx, J. Oster and D. Wichelns

More articles in Agricultural Water Management from Elsevier
Bibliographic data for series maintained by Catherine Liu ().