globalchange  > 气候变化事实与影响
DOI: 10.1002/hyp.13366
WOS记录号: WOS:000458923700011
论文题名:
Understanding hydrological processes in glacierized catchments: Evidence and implications of highly variable isotopic and electrical conductivity data
作者: Zuecco, Giulia1; Carturan, Luca1,2; De Blasi, Fabrizio1,3; Seppi, Roberto4; Zanoner, Thomas2; Penna, Daniele5; Borga, Marco1; Carton, Alberto2; Dalla Fontana, Giancarlo1
通讯作者: Zuecco, Giulia
刊名: HYDROLOGICAL PROCESSES
ISSN: 0885-6087
EISSN: 1099-1085
出版年: 2019
卷: 33, 期:5, 页码:816-832
语种: 英语
英文关键词: Alpine catchment ; electrical conductivity ; end members ; glacier ; ice ; runoff generation ; snow ; stable water isotopes
WOS关键词: CLIMATE-CHANGE IMPACTS ; EASTERN ITALIAN ALPS ; HYDROGRAPH SEPARATION ; RUNOFF GENERATION ; STABLE-ISOTOPES ; ORTLES-CEVEDALE ; END-MEMBER ; WATER ; SNOWMELT ; DISCHARGE
WOS学科分类: Water Resources
WOS研究方向: Water Resources
英文摘要:

The spatial and temporal characterization of geochemical tracers over Alpine glacierized catchments is particularly difficult, but fundamental to quantify groundwater, glacier melt, and rain water contribution to stream runoff. In this study, we analysed the spatial and temporal variability of delta H-2 and electrical conductivity (EC) in various water sources during three ablation seasons in an 8.4-km(2) glacierized catchment in the Italian Alps, in relation to snow cover and hydro-meteorological conditions. Variations in the daily streamflow range due to melt-induced runoff events were controlled by maximum daily air temperature and snow covered area in the catchment. Maximum daily streamflow decreased with increasing snow cover, and a threshold relation was found between maximum daily temperature and daily streamflow range. During melt-induced runoff events, stream water EC decreased due to the contribution of glacier melt water to stream runoff. In this catchment, EC could be used to distinguish the contribution of subglacial flow (identified as an end member, enriched in EC) from glacier melt water to stream runoff, whereas spring water in the study area could not be considered as an end member. The isotopic composition of snow, glacier ice, and melt water was not significantly correlated with the sampling point elevation, and the spatial variability was more likely affected by postdepositional processes. The high spatial and temporal variability in the tracer signature of the end members (subglacial flow, rain water, glacier melt water, and residual winter snow), together with small daily variability in stream water delta H-2 dynamics, are problematic for the quantification of the contribution of the identified end members to stream runoff, and call for further research, possibly integrated with other natural or artificial tracers.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/130314
Appears in Collections:气候变化事实与影响

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作者单位: 1.Univ Padua, Dept Land Environm Agr & Forestry, Via Univ 16, I-35020 Legnaro, PD, Italy
2.Univ Padua, Dept Geosci, Padua, Italy
3.CNR, Inst Dynam Environm Proc, Venice, Italy
4.Univ Pavia, Dept Earth & Environm Sci, Pavia, Italy
5.Univ Florence, Dept Agr Food & Forestry Syst, Florence, Italy

Recommended Citation:
Zuecco, Giulia,Carturan, Luca,De Blasi, Fabrizio,et al. Understanding hydrological processes in glacierized catchments: Evidence and implications of highly variable isotopic and electrical conductivity data[J]. HYDROLOGICAL PROCESSES,2019-01-01,33(5):816-832
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