NDLI: Groundwater evapotranspiration under psammophilous vegetation covers in the Mu Us Sandy Land, northern China

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Journal of Arid Land : Volume 8

Journal of Arid Land : Volume 7

Journal of Arid Land : Volume 6

Journal of Arid Land : Volume 5

Groundwater evapotranspiration under psammophilous vegetation covers in the Mu Us Sandy Land, northern China

Content Provider	Springer Nature Link
Author	Qian, Kang Qi, Lijun Cheng, Donghui Duan, Jibo Yang, Hongbin Chen, Xunhong
Copyright Year	2017
Abstract	Groundwater is a significant component of the hydrological cycle in arid and semi-arid areas. Its evapotranspiration is an important part of the water budget because many plants are groundwater-dependent. To restore the degraded ecosystems, the need is pressing to further our understanding of the groundwater evapotranspiration (ET$_{g}$) in arid and semi-arid areas. This study employed the White method to estimate ET$_{g}$ at four sites in the Mu Us Sandy Land in northern China, and the four sites are covered by Salix psammophila (SP site), Artemisia ordosica (AO site), Poplar alba (PA site), and Carex enervis (CE site), respectively. The depth of groundwater table and the duration of drainage were taken into account in calculating the specific yield (S$_{y}$) to improve the accuracy of the ET$_{g}$ estimats. Our results showed that from late May to early November 2013 the ET$_{g}$ were 361.87 (SP site), 372.53 (AO site), 597.86 (PA site) and 700.76 mm (CE site), respectively. The estimated ET$_{g}$ rate was also species-dependent and the descending order of the ET$_{g}$ rate for the four vegetation was: C. enervis, P. alba, A. ordosica, and S. psammophila. In addition, the depth of groundwater table has an obvious effect on the ET$_{g}$ rate and the effect varied with the vegetation types. Furthermore, the evapotranspiration for the vegetation solely relying on the water supply from unsaturated layers above the groundwater table was much less than that for the vegetation heavily relying on the water supply from shallow aquifers.
Starting Page	98
Ending Page	108
Page Count	11
File Format	PDF
ISSN	16746767
Journal	Journal of Arid Land
Volume Number	9
Issue Number	1
e-ISSN	21947783
Language	English
Publisher	Science Press
Publisher Date	2016-11-09
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	psammophilous vegetation Mu Us Sandy Land White method specific yield Sustainable Development Physical Geography groundwater evapotranspiration Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Water Science and Technology Management, Monitoring, Policy and Law

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