The Effect of Storage on Runoff from a Headwater Subarctic Shield Basin
ABSTRACT. Canadian Shield runoff production processes have been investigated, but research is needed beyond the hillslope scale to determine the influences on the volume and timing of runoff from headwater basins to higher-order streams. Such research will permit an understanding of the magnitude of...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.497.5490 2023-05-15T14:19:51+02:00 The Effect of Storage on Runoff from a Headwater Subarctic Shield Basin Christopher Spence The Pennsylvania State University CiteSeerX Archives 2000 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.5490 http://pubs.aina.ucalgary.ca/arctic/Arctic53-3-237.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.5490 http://pubs.aina.ucalgary.ca/arctic/Arctic53-3-237.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic53-3-237.pdf text 2000 ftciteseerx 2016-01-08T08:51:37Z ABSTRACT. Canadian Shield runoff production processes have been investigated, but research is needed beyond the hillslope scale to determine the influences on the volume and timing of runoff from headwater basins to higher-order streams. Such research will permit an understanding of the magnitude of climate change impacts at the watershed scale, where changes in the hydrologic regime are felt most by water resource users. To this end, water budget terms were measured over different portions of a headwater lake basin north of Yellowknife, Northwest Territories, during the spring snowmelt of 1998 to determine the relative importance of each component as water moved through the basin. Evaporation made up 16 % and runoff 70 % of the snowmelt from upland areas. Upland ponding of water during the melt increased the evaporative loss. Headwater lake storage deficits are very important in the timing and volume of runoff that is transmitted downstream: 53 % of basin meltwater went to meeting the storage deficit in the lake so that only 7 % of the meltwater was routed out of the basin. These results imply that topology of shield headwater basins, notably the location of lakes and antecedent water levels in lakes, are important in determining the runoff response. As storage deficits in surface waters will cause changes over space in runoff response and timing, it may be inappropriate to consider the snowpack or rainfall volume in isolation when forecasting runoff volume. These results are important for water management and hydrological modeling applications of northern shield basins. Key words: Canadian Shield, Northwest Territories, runoff, snowmelt, water management RÉSUMÉ. On a étudié les processus qui entraînent la production de ruissellement sur le Bouclier canadien, mais il faut envisager Text Arctic Northwest Territories Subarctic Yellowknife Unknown Northwest Territories Yellowknife |
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description |
ABSTRACT. Canadian Shield runoff production processes have been investigated, but research is needed beyond the hillslope scale to determine the influences on the volume and timing of runoff from headwater basins to higher-order streams. Such research will permit an understanding of the magnitude of climate change impacts at the watershed scale, where changes in the hydrologic regime are felt most by water resource users. To this end, water budget terms were measured over different portions of a headwater lake basin north of Yellowknife, Northwest Territories, during the spring snowmelt of 1998 to determine the relative importance of each component as water moved through the basin. Evaporation made up 16 % and runoff 70 % of the snowmelt from upland areas. Upland ponding of water during the melt increased the evaporative loss. Headwater lake storage deficits are very important in the timing and volume of runoff that is transmitted downstream: 53 % of basin meltwater went to meeting the storage deficit in the lake so that only 7 % of the meltwater was routed out of the basin. These results imply that topology of shield headwater basins, notably the location of lakes and antecedent water levels in lakes, are important in determining the runoff response. As storage deficits in surface waters will cause changes over space in runoff response and timing, it may be inappropriate to consider the snowpack or rainfall volume in isolation when forecasting runoff volume. These results are important for water management and hydrological modeling applications of northern shield basins. Key words: Canadian Shield, Northwest Territories, runoff, snowmelt, water management RÉSUMÉ. On a étudié les processus qui entraînent la production de ruissellement sur le Bouclier canadien, mais il faut envisager |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Christopher Spence |
spellingShingle |
Christopher Spence The Effect of Storage on Runoff from a Headwater Subarctic Shield Basin |
author_facet |
Christopher Spence |
author_sort |
Christopher Spence |
title |
The Effect of Storage on Runoff from a Headwater Subarctic Shield Basin |
title_short |
The Effect of Storage on Runoff from a Headwater Subarctic Shield Basin |
title_full |
The Effect of Storage on Runoff from a Headwater Subarctic Shield Basin |
title_fullStr |
The Effect of Storage on Runoff from a Headwater Subarctic Shield Basin |
title_full_unstemmed |
The Effect of Storage on Runoff from a Headwater Subarctic Shield Basin |
title_sort |
effect of storage on runoff from a headwater subarctic shield basin |
publishDate |
2000 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.5490 http://pubs.aina.ucalgary.ca/arctic/Arctic53-3-237.pdf |
geographic |
Northwest Territories Yellowknife |
geographic_facet |
Northwest Territories Yellowknife |
genre |
Arctic Northwest Territories Subarctic Yellowknife |
genre_facet |
Arctic Northwest Territories Subarctic Yellowknife |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic53-3-237.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.5490 http://pubs.aina.ucalgary.ca/arctic/Arctic53-3-237.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766291568240623616 |