Use of a hydrologic mixing model to examine the roles of meltwater, precipitation and groundwater in the Langtang River basin, Nepal
Understanding the hydrology of glacierized catchments is an important step in assessing the vulnerability of water resources to a changing climate. While there have been increased efforts recently to understand the dynamics of Asia's cryosphere, glacier melt dynamics and hydrograph separation o...
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Cambridge University Press
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ftdoajarticles:oai:doaj.org/article:9d11326071d944ddb54d4e1bcad661a2 2023-05-15T13:29:28+02:00 Use of a hydrologic mixing model to examine the roles of meltwater, precipitation and groundwater in the Langtang River basin, Nepal Alāna M. Wilson Mark W. Williams Rijan B. Kayastha Adina Racoviteanu 2016-03-01T00:00:00Z https://doi.org/10.3189/2016AoG71A067 https://doaj.org/article/9d11326071d944ddb54d4e1bcad661a2 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305500000173/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.3189/2016AoG71A067 0260-3055 1727-5644 https://doaj.org/article/9d11326071d944ddb54d4e1bcad661a2 Annals of Glaciology, Vol 57, Pp 155-168 (2016) debris-covered glaciers meltwater chemistry mountain glaciers Meteorology. Climatology QC851-999 article 2016 ftdoajarticles https://doi.org/10.3189/2016AoG71A067 2023-03-12T01:31:57Z Understanding the hydrology of glacierized catchments is an important step in assessing the vulnerability of water resources to a changing climate. While there have been increased efforts recently to understand the dynamics of Asia's cryosphere, glacier melt dynamics and hydrograph separation of river discharge are open questions. A multi-year, multi-seasonal dataset of water chemistry from the Langtang Valley, Nepal, is used to explore water sources and flow paths that contribute to Langtang River discharge. Differences in hydrochemistry of samples from debris-free Khimsung Glacier and debris-covered Lirung Glacier demonstrate the effect of debris cover on glacier outflow. Additional data show seasonal transitions in the composition of Langtang River discharge. End-member mixing analysis (EMMA) using geochemical and isotopic tracers suggests that reacted meltwater contributes the majority of flow during most of the year, with the exception of the summer when unreacted meltwater and precipitation dominate streamflow. We hypothesize our dataset is missing characteristic monsoon water and utilize a Late May river sample as a proxy for precipitation-influenced groundwater in the EMMA. Results offer insight into the plausibility of flow sources and pathways in the basin. Article in Journal/Newspaper Annals of Glaciology Directory of Open Access Journals: DOAJ Articles May River ENVELOPE(-111.369,-111.369,55.717,55.717) Annals of Glaciology 57 71 155 168 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
debris-covered glaciers meltwater chemistry mountain glaciers Meteorology. Climatology QC851-999 |
spellingShingle |
debris-covered glaciers meltwater chemistry mountain glaciers Meteorology. Climatology QC851-999 Alāna M. Wilson Mark W. Williams Rijan B. Kayastha Adina Racoviteanu Use of a hydrologic mixing model to examine the roles of meltwater, precipitation and groundwater in the Langtang River basin, Nepal |
topic_facet |
debris-covered glaciers meltwater chemistry mountain glaciers Meteorology. Climatology QC851-999 |
description |
Understanding the hydrology of glacierized catchments is an important step in assessing the vulnerability of water resources to a changing climate. While there have been increased efforts recently to understand the dynamics of Asia's cryosphere, glacier melt dynamics and hydrograph separation of river discharge are open questions. A multi-year, multi-seasonal dataset of water chemistry from the Langtang Valley, Nepal, is used to explore water sources and flow paths that contribute to Langtang River discharge. Differences in hydrochemistry of samples from debris-free Khimsung Glacier and debris-covered Lirung Glacier demonstrate the effect of debris cover on glacier outflow. Additional data show seasonal transitions in the composition of Langtang River discharge. End-member mixing analysis (EMMA) using geochemical and isotopic tracers suggests that reacted meltwater contributes the majority of flow during most of the year, with the exception of the summer when unreacted meltwater and precipitation dominate streamflow. We hypothesize our dataset is missing characteristic monsoon water and utilize a Late May river sample as a proxy for precipitation-influenced groundwater in the EMMA. Results offer insight into the plausibility of flow sources and pathways in the basin. |
format |
Article in Journal/Newspaper |
author |
Alāna M. Wilson Mark W. Williams Rijan B. Kayastha Adina Racoviteanu |
author_facet |
Alāna M. Wilson Mark W. Williams Rijan B. Kayastha Adina Racoviteanu |
author_sort |
Alāna M. Wilson |
title |
Use of a hydrologic mixing model to examine the roles of meltwater, precipitation and groundwater in the Langtang River basin, Nepal |
title_short |
Use of a hydrologic mixing model to examine the roles of meltwater, precipitation and groundwater in the Langtang River basin, Nepal |
title_full |
Use of a hydrologic mixing model to examine the roles of meltwater, precipitation and groundwater in the Langtang River basin, Nepal |
title_fullStr |
Use of a hydrologic mixing model to examine the roles of meltwater, precipitation and groundwater in the Langtang River basin, Nepal |
title_full_unstemmed |
Use of a hydrologic mixing model to examine the roles of meltwater, precipitation and groundwater in the Langtang River basin, Nepal |
title_sort |
use of a hydrologic mixing model to examine the roles of meltwater, precipitation and groundwater in the langtang river basin, nepal |
publisher |
Cambridge University Press |
publishDate |
2016 |
url |
https://doi.org/10.3189/2016AoG71A067 https://doaj.org/article/9d11326071d944ddb54d4e1bcad661a2 |
long_lat |
ENVELOPE(-111.369,-111.369,55.717,55.717) |
geographic |
May River |
geographic_facet |
May River |
genre |
Annals of Glaciology |
genre_facet |
Annals of Glaciology |
op_source |
Annals of Glaciology, Vol 57, Pp 155-168 (2016) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305500000173/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.3189/2016AoG71A067 0260-3055 1727-5644 https://doaj.org/article/9d11326071d944ddb54d4e1bcad661a2 |
op_doi |
https://doi.org/10.3189/2016AoG71A067 |
container_title |
Annals of Glaciology |
container_volume |
57 |
container_issue |
71 |
container_start_page |
155 |
op_container_end_page |
168 |
_version_ |
1766000828786671616 |