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000893789 1001_ $$0P:(DE-HGF)0$$aZhang, Zaiyong$$b0$$eCorresponding author
000893789 245__ $$aSalix psammophila afforestations can cause a decline of the water table, prevent groundwater recharge and reduce effective infiltration
000893789 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2021
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000893789 520__ $$aAfforestation can reduce desertification and soil erosion. However, the hydrologic implications of afforestation are not well investigated, especially in arid and semi-arid regions. China has the largest area of afforestation in the world, with one-third of the world's total plantation forests. How the shrubs affect evapotranspiration, soil moisture dynamics, and groundwater recharge remains unclear. We designed two pairs of lysimeters, one being 1.2 m deep and the other one 4.2 m deep. Each pair consists of one lysimeter with bare soil, while on the other one a shrub is planted. The different water table depths were implemented to understand how depth to groundwater affects soil moisture and water table dynamics under different hydrological conditions. Soil moisture, water table depth, sap flow, and rainfall were measured concurrently. Our study confirms that for the current meteorological conditions in the Ordos plateau recharge is reduced or even prohibited through the large-scale plantation Salix psammophila. Shrubs also raise the threshold of precipitation required to increase soil moisture of the surface ground. For the conditions we analyzed, a minimum of 6 mm of precipitation was required for infiltration processes to commence. In addition to the hydrological analysis, the density of root distribution is assessed outside of the lysimeters for different water table depths. The results suggest that the root-density distribution is strongly affected by water table depth. Our results have important implications for the determination of the optimal shrub-density in future plantations, as well as for the conceptualization of plant roots in upcoming numerical models.
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000893789 7001_ $$0P:(DE-HGF)0$$aWang, Wenke$$b1
000893789 7001_ $$0P:(DE-HGF)0$$aGong, Chengcheng$$b2
000893789 7001_ $$0P:(DE-HGF)0$$aZhao, Ming$$b3
000893789 7001_ $$0P:(DE-HGF)0$$aBrunner, Philip$$b4
000893789 7001_ $$0P:(DE-Juel1)138662$$aHendricks-Franssen, Harrie-Jan$$b5
000893789 773__ $$0PERI:(DE-600)1498726-0$$a10.1016/j.scitotenv.2021.146336$$gVol. 780, p. 146336 -$$p146336 -$$tThe science of the total environment$$v780$$x0048-9697$$y2021
000893789 8564_ $$uhttps://juser.fz-juelich.de/record/893789/files/zaiyongzhangsalix-submission-12.30.pdf$$yPublished on 2021-03-11. Available in OpenAccess from 2023-03-11.
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