DOI: 10.5194/hess-21-3025-2017
Scopus记录号: 2-s2.0-85021340294
论文题名: Identification of runoff formation with two dyes in a mid-latitude mountain headwater
作者: Vlček L ; , Falátková K ; , Schneider P
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 6 起始页码: 3025
结束页码: 3040
语种: 英语
Scopus关键词: Catchments
; Dyes
; Forestry
; Groundwater
; Groundwater flow
; Landforms
; Peat
; Pipe flow
; Soils
; Solvents
; Wetlands
; Changing climate
; Dye stained soils
; Fluorescein sodiums
; Formation process
; Hydrologic cycles
; Preferential flows
; Shallow subsurface
; Unsaturated zone
; Runoff
; climate change
; dye
; experimental study
; headwater
; hillslope
; hydrological cycle
; identification method
; latitude
; mountain region
; peatland
; riparian zone
; runoff
; subsurface flow
英文摘要: Subsurface flow in peat bog areas and its role in the hydrologic cycle has garnered increased attention as water scarcity and floods have increased due to a changing climate. In order to further probe the mechanisms in peat bog areas and contextualize them at the catchment scale, this experimental study identifies runoff formation at two opposite hillslopes in a peaty mountain headwater; a slope with organic peat soils and a shallow phreatic zone (0.5 m below surface), and a slope with mineral Podzol soils and no detectable groundwater (> 2 m below surface). Similarities and differences in infiltration, percolation and preferential flow paths between both hillslopes could be identified by sprinkling experiments with Brilliant Blue and Fluorescein sodium. To our knowledge, this is the first time these two dyes have been compared in their ability to stain preferential flow paths in soils. Dye-stained soil profiles within and downstream of the sprinkling areas were excavated parallel (lateral profiles) and perpendicular (frontal profiles) to the slopes' gradients. That way preferential flow patterns in the soil could be clearly identified. The results show that biomat flow, shallow subsurface flow in the organic topsoil layer, occurred at both hillslopes; however, at the peat bog hillslope it was significantly more prominent. The dye solutions infiltrated into the soil and continued either as lateral subsurface pipe flow in the case of the peat bog, or percolated vertically towards the bedrock in the case of the Podzol. This study provides evidence that subsurface pipe flow, lateral preferential flow along decomposed tree roots or logs in the unsaturated zone, is a major runoff formation process at the peat bog hillslope and in the adjacent riparian zone. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79145
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Physical Geography and Geoecology, Charles University, Prague, Czech Republic; Department of Geography, University of Zurich, Zurich, Switzerland
Recommended Citation:
Vlček L,, Falátková K,, Schneider P. Identification of runoff formation with two dyes in a mid-latitude mountain headwater[J]. Hydrology and Earth System Sciences,2017-01-01,21(6)