Paper Info
Title
Evapotranspiration partitioning using an optimality-based ecohydrological model in a semiarid shrubland
Abstract
Partitioning of evapotranspiration (ET) into biological component transpiration (T) and non-biological component evaporation (E) is crucial in understanding the impact of environmental change on ecosystems and water resources. However, direct measurement of transpiration is still challenging. In this paper, an optimality-based ecohydrological model named Vegetation Optimality Model (VOM) is applied for ET partitioning. The results show that VOM model can reasonably simulate ET and ET components in a semiarid shrubland. Overall, the ratio of transpiration to evapotranspiration is 49% for the whole period. Evaporation and plant transpiration mainly occur in monsoon following the precipitation events. Evaporation responds immediately to precipitation events, while transpiration shows a lagged response of several days to those events. Different years demonstrate different patterns of T/ET ratio dynamic in monsoon. Some of the years show a low T/ET ratio at the beginning of monsoon and slowly increased T/ET ratio. Other years show a high level of T/ET ratio for the whole monsoon. We find out that spring precipitation, especially the size of the precipitation, has a significant influence on the T/ET ratio in monsoon.
Year
DOI
Venue
2019
10.1080/17538947.2018.1503741
INTERNATIONAL JOURNAL OF DIGITAL EARTH
Keywords
DocType
Volume
ET partitioning,optimality-based ecohydrological model,VOM,semiarid shrubland
Journal
12.0
Issue
ISSN
Citations 
12.0
1753-8947
1
PageRank 
References 
Authors
0.63
0
9
Name
Order
Citations
PageRank
Lajiao Chen1838.33
Liying Sun210.63
Weijiang Liu310.63
Lizhe Wang42973191.46
Lizhe Wang510.63
Hui Wu610.63
A-Xing Zhu722837.22
A-Xing Zhu822837.22
Yiqi Luo9145.33