Quick Search:       Advanced Search
Seasonal evolution of the englacial and subglacial drainage systems of a temperate glacier revealed by hydrological analysis
    Click here to download the full text
Citation of this paper:Qiao Liu,ShiYin Liu,2010.Seasonal evolution of the englacial and subglacial drainage systems of a temperate glacier revealed by hydrological analysis.Sciences in Cold and Arid Regions,2(1):0051~0058.
Hits: 2437
Download times: 2898
Author NameAffiliationE-mail
Qiao Liu 1. State Key Laboratory of Cryosphere Science, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China 2. Institute of Mountain Hazards and Environment (IMHE), Chinese Academy of Sc liuqiao@imde.ac.cn 
ShiYin Liu State Key Laboratory of Cryosphere Science, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China  
 
Abstract:Englacial and subglacial drainage systems of temperate glaciers have a strong influence on glacier dynamics, glacier-induced floods, glacier-weathering processes, and runoff from glacierized drainage basins. Proglacial discharge is partly controlled by the geometry of the glacial drainage network and by the process of producing meltwater. The glacial-drainage system of some alpine glaciers has been characterized using a model based on proglacial discharge analysis. In this paper, we apply cross-correlation analysis to hourly hydro-climatic data collected from China’s Hailuogou Glacier, a typical temperate glacier in Mt. Gongga, to study the seasonal status changes of the englacial and subglacial drainage systems by discharge-temperature (Q-T) time lag analysis. During early ablation season (April–May) of 2003, 2004 and 2005, the change of englacial and subglacial drainage system usually leads several outburst flood events, which are also substantiated by observing the leakage of supraglacial pond and crevasses pond water during field works in April, 2008. At the end of ablation season (October–December), the glacial-drainage networks become less hydro-efficient. Those events are evidenced by hourly hydro-process near the terminus of Hailuogou Glacier, and the analysis of Q-T time lags also can be a good indicator of those changes. However, more detailed observations or experiments, e.g. dye-tracing experiment and recording borehole water level variations, are necessary to describe the evolutionary status and processes of englacial and subglacial drainage systems evolution during ablation season.
keywords:glacier drainage system  temperate glacier  seasonal evolution  time lag  glacier runoff  hydrologic process  Hailuogou Glacier
HTML  View Full Text  View/Add Comment  Download reader