Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA
Abstract Building continental‐scale hydrologic models in data‐sparse regions requires an understanding of spatial variation in hydrologic processes. Extending these models to ungaged locations requires techniques to group ungaged locations with gaged ones to make process importance and model paramet...
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crwiley:10.1002/rra.4028 2024-06-02T08:02:42+00:00 Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA Barnhart, Theodore B. Farmer, William H. Hammond, John C. Sexstone, Graham A. Curran, Janet H. Koch, Joshua C. Driscoll, Jessica M. U.S. Geological Survey 2022 http://dx.doi.org/10.1002/rra.4028 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.4028 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/rra.4028 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/rra.4028 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor River Research and Applications volume 38, issue 9, page 1569-1584 ISSN 1535-1459 1535-1467 journal-article 2022 crwiley https://doi.org/10.1002/rra.4028 2024-05-03T11:53:20Z Abstract Building continental‐scale hydrologic models in data‐sparse regions requires an understanding of spatial variation in hydrologic processes. Extending these models to ungaged locations requires techniques to group ungaged locations with gaged ones to make process importance and model parameter transfer decisions to ungaged locations. This analysis (1) tested the utility of fundamental streamflow statistics (FDSS) in defining hydrologic regions across Alaska, USA; (2) evaluated if the hydrologic regions represented different hydrologic processes; and (3) tested the ability of random forest and direct assignment techniques, informed by statistically estimated FDSS (FDSSest) and basin characteristics (BCs), to correctly assign ungaged locations to hydrologic regions. Six hydrologic regions were identified across the domain using FDSS. Differences in mean flow, phase shift of the seasonal cycle, and skewness were the primary characteristics defining each region. Two regions represented arctic and continental climates, generally in the northern portion of the domain; four regions represented the southern, maritime portion of the domain. Random forest modeling with BCs (67% success rate) outperformed FDSSest (58% success rate) suggesting that no statistically estimated streamflow was needed to assign ungaged locations to a region. For regions with many sites, most region assignment techniques performed similarly. Random forest modeling performance declined when BCs and FDSSest were both used to predict region membership, suggesting FDSSest had little information in addition to BCs. This analysis demonstrated that FDSS‐based hydrologic regions discern process differences across a data‐sparse and hydrologically diverse landscape. Process importance rankings from random forest‐derived BCs provided model‐independent information for making modeling decisions. Key points Fundamental daily streamflow statistics produce distinct hydrologic regions across Alaska, USA Distinct hydrologic processes are recognizable in ... Article in Journal/Newspaper Arctic Alaska Wiley Online Library Arctic River Research and Applications 38 9 1569 1584 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Building continental‐scale hydrologic models in data‐sparse regions requires an understanding of spatial variation in hydrologic processes. Extending these models to ungaged locations requires techniques to group ungaged locations with gaged ones to make process importance and model parameter transfer decisions to ungaged locations. This analysis (1) tested the utility of fundamental streamflow statistics (FDSS) in defining hydrologic regions across Alaska, USA; (2) evaluated if the hydrologic regions represented different hydrologic processes; and (3) tested the ability of random forest and direct assignment techniques, informed by statistically estimated FDSS (FDSSest) and basin characteristics (BCs), to correctly assign ungaged locations to hydrologic regions. Six hydrologic regions were identified across the domain using FDSS. Differences in mean flow, phase shift of the seasonal cycle, and skewness were the primary characteristics defining each region. Two regions represented arctic and continental climates, generally in the northern portion of the domain; four regions represented the southern, maritime portion of the domain. Random forest modeling with BCs (67% success rate) outperformed FDSSest (58% success rate) suggesting that no statistically estimated streamflow was needed to assign ungaged locations to a region. For regions with many sites, most region assignment techniques performed similarly. Random forest modeling performance declined when BCs and FDSSest were both used to predict region membership, suggesting FDSSest had little information in addition to BCs. This analysis demonstrated that FDSS‐based hydrologic regions discern process differences across a data‐sparse and hydrologically diverse landscape. Process importance rankings from random forest‐derived BCs provided model‐independent information for making modeling decisions. Key points Fundamental daily streamflow statistics produce distinct hydrologic regions across Alaska, USA Distinct hydrologic processes are recognizable in ... |
author2 |
U.S. Geological Survey |
format |
Article in Journal/Newspaper |
author |
Barnhart, Theodore B. Farmer, William H. Hammond, John C. Sexstone, Graham A. Curran, Janet H. Koch, Joshua C. Driscoll, Jessica M. |
spellingShingle |
Barnhart, Theodore B. Farmer, William H. Hammond, John C. Sexstone, Graham A. Curran, Janet H. Koch, Joshua C. Driscoll, Jessica M. Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA |
author_facet |
Barnhart, Theodore B. Farmer, William H. Hammond, John C. Sexstone, Graham A. Curran, Janet H. Koch, Joshua C. Driscoll, Jessica M. |
author_sort |
Barnhart, Theodore B. |
title |
Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA |
title_short |
Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA |
title_full |
Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA |
title_fullStr |
Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA |
title_full_unstemmed |
Evaluating hydrologic region assignment techniques for ungaged basins in Alaska, USA |
title_sort |
evaluating hydrologic region assignment techniques for ungaged basins in alaska, usa |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/rra.4028 https://onlinelibrary.wiley.com/doi/pdf/10.1002/rra.4028 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/rra.4028 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/rra.4028 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Alaska |
genre_facet |
Arctic Alaska |
op_source |
River Research and Applications volume 38, issue 9, page 1569-1584 ISSN 1535-1459 1535-1467 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/rra.4028 |
container_title |
River Research and Applications |
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38 |
container_issue |
9 |
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1569 |
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1584 |
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1800747170590097408 |