DOI: 10.5194/hess-20-1621-2016
Scopus记录号: 2-s2.0-84966304369
论文题名: Factors influencing stream baseflow transit times in tropical montane watersheds
作者: Muñoz-Villers L ; E ; , Geissert D ; R ; , Holwerda F ; , McDonnell J ; J
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 4 起始页码: 1621
结束页码: 1635
语种: 英语
Scopus关键词: Geographic information systems
; Hydraulic machinery
; Land use
; Runoff
; Soil moisture
; Soils
; Stream flow
; Tropics
; Catchment characteristics
; Hydrologic parameters
; Important features
; Isotopic composition
; Laboratory analysis
; Mean transit time
; Mountainous regions
; Soil water retention
; Catchments
; baseflow
; basin analysis
; catchment
; cloud forest
; GIS
; headwater
; isotopic composition
; mountain region
; precipitation (climatology)
; soil water
; streamflow
; topography
; tropical region
; volcanic soil
; water retention
; watershed
; Mexico [North America]
; Veracruz
英文摘要: Stream water mean transit time (MTT) is a fundamental hydrologic parameter that integrates the distribution of sources, flow paths, and storages present in catchments. However, in the tropics little MTT work has been carried out, despite its usefulness for providing important information on watershed functioning at different spatial scales in (largely) ungauged basins. In particular, very few studies have quantified stream MTTs or have related these to catchment characteristics in tropical montane regions. Here we examined topographic, land use/cover and soil hydraulic controls on baseflow transit times for nested catchments (0.1-34ĝ€km2) within a humid mountainous region, underlain by volcanic soil (Andisols) in central Veracruz (eastern Mexico). We used a 2-year record of bi-weekly isotopic composition of precipitation and stream baseflow data to estimate MTT. Land use/cover and topographic parameters (catchment area and form, drainage density, slope gradient and length) were derived from geographic information system (GIS) analysis. Soil water retention characteristics, and depth and permeability of the soil-bedrock interface were obtained from intensive field measurements and laboratory analysis. Results showed that baseflow MTTs ranged between 1.2 and 2.7 years across the 12 study catchments. Overall, MTTs across scales were mainly controlled by catchment slope and the permeability observed at the soil-bedrock interface. In association with topography, catchment form and the depth to the soil-bedrock interface were also identified as important features influencing baseflow MTTs. The greatest differences in MTTs were found both within groups of small (0.1-1.5ĝ€km2) and large (14-34ĝ€km2) catchments. Interestingly, the longest stream MTTs were found in the headwater cloud forest catchments. © Author(s) 2016. CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78861
Appears in Collections: 气候变化事实与影响
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作者单位: Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Ciudad UniversitariaCiudad de México, Mexico; Instituto de Ecología, A. C., Red de Ecología Funcional, Xalapa, Veracruz, Mexico; Global Institute for Water Security, University of Saskatchewan, Saskatoon, Canada; School of Geosciences, University of Aberdeen, Aberdeen, United Kingdom
Recommended Citation:
Muñoz-Villers L,E,, Geissert D,et al. Factors influencing stream baseflow transit times in tropical montane watersheds[J]. Hydrology and Earth System Sciences,2016-01-01,20(4)