DOI: 10.5194/hess-18-4113-2014
Scopus记录号: 2-s2.0-84908032984
论文题名: Stable water isotope tracing through hydrological models for disentangling runoff generation processes at the hillslope scale
作者: Windhorst D ; , Kraft P ; , Timbe E ; , Frede H ; -G ; , Breuer L
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 10 起始页码: 4113
结束页码: 4127
语种: 英语
Scopus关键词: Hillslopes
; Hydrological models
; Runoff generation process
; Stable water isotopes
; catchment
; hillslope
; rainfall-runoff modeling
; recharge
; soil profile
; stable isotope
; subsurface flow
; Ecuador
英文摘要: Hillslopes are the dominant landscape components where incoming precipitation becomes groundwater, streamflow or atmospheric water vapor. However, directly observing flux partitioning in the soil is almost impossible. Hydrological hillslope models are therefore being used to investigate the processes involved. Here we report on a modeling experiment using the Catchment Modeling Framework (CMF) where measured stable water isotopes in vertical soil profiles along a tropical mountainous grassland hillslope transect are traced through the model to resolve potential mixing processes. CMF simulates advective transport of stable water isotopes 18O and 2H based on the Richards equation within a fully distributed 2-D representation of the hillslope. The model successfully replicates the observed temporal pattern of soil water isotope profiles (R2 0.84 and Nash-Sutcliffe efficiency (NSE) 0.42). Predicted flows are in good agreement with previous studies. We highlight the importance of groundwater recharge and shallow lateral subsurface flow, accounting for 50 and 16% of the total flow leaving the system, respectively. Surface runoff is negligible despite the steep slopes in the Ecuadorian study region. © 2014 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78104
Appears in Collections: 气候变化事实与影响
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作者单位: Institute for Landscape Ecology and Resources Management (ILR), Research Centre for BioSystems, Land Use and Nutrition (IFZ), Justus-Liebig-Universität Gießen, Gießen, Germany; Departamento de Recursos Hídricos y Ciencias Ambientales, Universidad de Cuenca, Cuenca, Ecuador
Recommended Citation:
Windhorst D,, Kraft P,, Timbe E,et al. Stable water isotope tracing through hydrological models for disentangling runoff generation processes at the hillslope scale[J]. Hydrology and Earth System Sciences,2014-01-01,18(10)