Preprints
https://doi.org/10.5194/hess-2016-223
https://doi.org/10.5194/hess-2016-223
 
18 May 2016
18 May 2016
Status: this preprint was under review for the journal HESS but the revision was not accepted.

Effects of terracing on soil water and canopy transpiration of Chinese pine plantation in the Loess Plateau, China

Handan Zhang1,2, Wei Wei1, Liding Chen1, and Lixin Wang3 Handan Zhang et al.
  • 1State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Department of Earth Sciences, Indiana University - Purdue University Indianapolis (IUPUI), Indianapolis 46202, United States

Abstract. Terracing has long been considered one of the most effective measures for soil water conservation and site improvement. However, the quantitative effects of terracing on soil water dynamics and vegetation water use have not been reported. To fill these knowledge gaps, in this study, soil water content and canopy transpiration were monitored in both terrace and slope environments in the semiarid Loess Plateau of China in 2014 and 2015. Results showed that terracing increased soil water content of different soil layers. Mean soil water content of the terrace site was 25.4 % and 13.7 % higher than that in the slope site in 2014 and 2015, and canopy transpiration at the terrace site increased by 9.1 % and 4.8 %, respectively. Canopy conductance at the terrace site was 3.9 % higher than that at the slope site and it decreased logarithmically with vapor pressure deficit. This study highlighted the critical role of terracing in increasing the soil water content and mitigating water stress in semiarid environments. Thus, terracing has the potential to enhance sustainable vegetation restoration in water-limited regions.

Handan Zhang et al.

 
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Status: closed
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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Handan Zhang et al.

Handan Zhang et al.

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Short summary
Terracing has long been considered one of the most effective measures for soil water conservation and site improvement. However, the quantitative effects of terracing on soil water dynamics and vegetation water use have not been reported. In our study, two adjacent sloping Pinus tabulaeformis plantations were chosen for the experiment, with one terraced for over 30 years, to highlight the critical role of terracing in both soil water improvement and water-stress mitigation.