DOI: 10.5194/hess-20-1301-2016
Scopus记录号: 2-s2.0-84964374557
论文题名: Does drought alter hydrological functions in forest soils?
作者: Gimbel K ; F ; , Puhlmann H ; , Weiler M
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 3 起始页码: 1301
结束页码: 1317
语种: 英语
Scopus关键词: Climate change
; Drought
; Forestry
; Groundwater
; Groundwater flow
; Recharging (underground waters)
; Soil moisture
; Soil testing
; Soils
; Water quality
; Antecedent soil moisture
; Climatic conditions
; Ground water recharge
; Hydrological functions
; Hydrological models
; Hydrological system
; Precipitation patterns
; Water drop penetration time
; Infiltration
; clay soil
; climate change
; climate conditions
; coniferous forest
; deciduous forest
; dye tracer
; forest ecosystem
; groundwater
; hydrological cycle
; hydrological modeling
; hydrophobicity
; infiltration
; preferential flow
; recharge
; runoff
; sandy soil
; soil moisture
; water quality
; Germany
英文摘要: Climate change is expected to impact the water cycle and severely affect precipitation patterns across central Europe and in other parts of the world, leading to more frequent and severe droughts. Usually when projecting drought impacts on hydrological systems, it is assumed that system properties, like soil properties, remain stable and will not be affected by drought events. To study if this assumption is appropriate, we address the effects of drought on the infiltration behavior of forest soils using dye tracer experiments on six sites in three regions across Germany, which were forced into drought conditions. The sites cover clayey-, loamy- and sandy-textured soils. In each region, we compared a deciduous and a coniferous forest stand to address differences between the main tree species. The results of the dye tracer experiments show clear evidence for changes in infiltration behavior at the sites. The infiltration changed at the clayey plots from regular and homogeneous flow to fast preferential flow. Similar behavior was observed at the loamy plots, where large areas in the upper layers remained dry, displaying signs of strong water repellency. This was confirmed by water drop penetration time (WDPT) tests, which revealed, in all except one plot, moderate to severe water repellency. Water repellency was also accountable for the change of regular infiltration to fingered flow in the sandy soils. The results of this study suggest that the drought history or, more generally, the climatic conditions of a soil in the past are more important than the actual antecedent soil moisture status regarding hydrophobicity and infiltration behavior; furthermore, drought effects on infiltration need to be considered in hydrological models to obtain realistic predictions concerning water quality and quantity in runoff and groundwater recharge © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78879
Appears in Collections: 气候变化事实与影响
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作者单位: Hydrology, Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany; Forest Research Institute Baden-Württemberg, Freiburg, Germany
Recommended Citation:
Gimbel K,F,, Puhlmann H,et al. Does drought alter hydrological functions in forest soils?[J]. Hydrology and Earth System Sciences,2016-01-01,20(3)