The influences of catchment geomorphology and scale on runoff generation in a northern peatland complex
Abstract We computed daily discharge ( Q ) versus gross drainage area ( GDA ) regression analyses for the 2009 and 2010 growing seasons for six small to medium headwater catchments at a northern peatland complex in the James/Hudson Bay lowlands. Temporal dynamics of the daily goodness of fits ( R 2...
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crwiley:10.1002/hyp.9322 2024-06-02T08:07:54+00:00 The influences of catchment geomorphology and scale on runoff generation in a northern peatland complex Richardson, Murray Ketcheson, Scott Whittington, Peter Price, Jonathan 2012 http://dx.doi.org/10.1002/hyp.9322 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.9322 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.9322 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 26, issue 12, page 1805-1817 ISSN 0885-6087 1099-1085 journal-article 2012 crwiley https://doi.org/10.1002/hyp.9322 2024-05-03T11:13:36Z Abstract We computed daily discharge ( Q ) versus gross drainage area ( GDA ) regression analyses for the 2009 and 2010 growing seasons for six small to medium headwater catchments at a northern peatland complex in the James/Hudson Bay lowlands. Temporal dynamics of the daily goodness of fits ( R 2 ) between Q and GDA were then examined to identify the most relevant conceptual model of runoff generation in this landscape. We observed high R 2 values during low flow conditions (mean R 2 = 0.93 for 2009 and 2010). During wetter periods and in particular during large runoff events, the relationship degraded rapidly and consistently, suggesting differences in quickflow response among the gauged catchments. At low flows, the six catchments generated equivalent amounts of runoff (mm), leading to a strong Q–GDA relationship. During high flows, total growing season runoff increased systematically with GDA between 8 and 50 km 2 and then decreased with further increases in GDA . These differences were responsible for the observed breakdown in the daily Q–GDA relationships and also resulted in significant differences in total runoff among the six catchments during the wetter year. Quantitative landscape analysis using a 5‐m resolution Light Detection and Ranging (LiDAR) digital elevation model revealed that near‐stream zone characteristics vary systematically with scale in a manner that is consistent with the observed patterns of quickflow runoff response. In this northern peatland complex, fast‐responding flowpaths in the spatially discrete near‐stream zones may be the key determinant of catchment runoff efficiency at the small to medium (~10 to ~200 km 2 ) headwater catchment scales analysed here. Moreover, the relatively organized drainage patterns observed in this study are consistent with our understanding of ecohydrological feedbacks driving geomorphic evolution of northern peatlands. Copyright © 2012 John Wiley & Sons, Ltd. Article in Journal/Newspaper Hudson Bay Wiley Online Library Hudson Hudson Bay Hydrological Processes 26 12 1805 1817 |
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Wiley Online Library |
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English |
description |
Abstract We computed daily discharge ( Q ) versus gross drainage area ( GDA ) regression analyses for the 2009 and 2010 growing seasons for six small to medium headwater catchments at a northern peatland complex in the James/Hudson Bay lowlands. Temporal dynamics of the daily goodness of fits ( R 2 ) between Q and GDA were then examined to identify the most relevant conceptual model of runoff generation in this landscape. We observed high R 2 values during low flow conditions (mean R 2 = 0.93 for 2009 and 2010). During wetter periods and in particular during large runoff events, the relationship degraded rapidly and consistently, suggesting differences in quickflow response among the gauged catchments. At low flows, the six catchments generated equivalent amounts of runoff (mm), leading to a strong Q–GDA relationship. During high flows, total growing season runoff increased systematically with GDA between 8 and 50 km 2 and then decreased with further increases in GDA . These differences were responsible for the observed breakdown in the daily Q–GDA relationships and also resulted in significant differences in total runoff among the six catchments during the wetter year. Quantitative landscape analysis using a 5‐m resolution Light Detection and Ranging (LiDAR) digital elevation model revealed that near‐stream zone characteristics vary systematically with scale in a manner that is consistent with the observed patterns of quickflow runoff response. In this northern peatland complex, fast‐responding flowpaths in the spatially discrete near‐stream zones may be the key determinant of catchment runoff efficiency at the small to medium (~10 to ~200 km 2 ) headwater catchment scales analysed here. Moreover, the relatively organized drainage patterns observed in this study are consistent with our understanding of ecohydrological feedbacks driving geomorphic evolution of northern peatlands. Copyright © 2012 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Richardson, Murray Ketcheson, Scott Whittington, Peter Price, Jonathan |
spellingShingle |
Richardson, Murray Ketcheson, Scott Whittington, Peter Price, Jonathan The influences of catchment geomorphology and scale on runoff generation in a northern peatland complex |
author_facet |
Richardson, Murray Ketcheson, Scott Whittington, Peter Price, Jonathan |
author_sort |
Richardson, Murray |
title |
The influences of catchment geomorphology and scale on runoff generation in a northern peatland complex |
title_short |
The influences of catchment geomorphology and scale on runoff generation in a northern peatland complex |
title_full |
The influences of catchment geomorphology and scale on runoff generation in a northern peatland complex |
title_fullStr |
The influences of catchment geomorphology and scale on runoff generation in a northern peatland complex |
title_full_unstemmed |
The influences of catchment geomorphology and scale on runoff generation in a northern peatland complex |
title_sort |
influences of catchment geomorphology and scale on runoff generation in a northern peatland complex |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1002/hyp.9322 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.9322 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.9322 |
geographic |
Hudson Hudson Bay |
geographic_facet |
Hudson Hudson Bay |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_source |
Hydrological Processes volume 26, issue 12, page 1805-1817 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.9322 |
container_title |
Hydrological Processes |
container_volume |
26 |
container_issue |
12 |
container_start_page |
1805 |
op_container_end_page |
1817 |
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1800753034098114560 |