EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/26/2021 | 8:30 AM - 10:30 AM | Spatial patterns of temporal change in non-perennial flow regimes across the United States | Virtual Platform
Spatial patterns of temporal change in non-perennial flow regimes across the United States
More than half of the Earth’s rivers and streams lack perennial flow. These systems are critical to ecosystems and society, and are the subject of policy debate. Yet, we lack a comprehensive understanding of the drivers of spatial and temporal patterns in non-perennial flow regimes. Here we analyze non-perennial flow regimes at 540 U.S. Geological Survey stream gages across the contiguous U.S. We focused on three non-perennial flow signatures: annual no-flow duration, dry-down period, and no-flow timing. At the continental scale, aridity was the primary driver of these metrics, but at regional scales unique combinations of climatic, physiographic, and anthropogenic drivers emerged. Preliminary results indicate that half of gages exhibit a significant change through time in at least one no-flow metric, with changes in no-flow duration being observed at 41% of gages. We observed regional differences in these changes with widespread drying in the southern U.S. and wetting in the northern U.S. Our results suggest that climate and land cover are drivers of non-perennial flow, and changes therein are causing shifts in non-perennial conditions across the U.S.
- Dry rivers
- IRES
- Climate change
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Presenters/Authors
John Hammond
(), USGS, jhammond@usgs.gov;
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Samuel Zipper
(), Kansas Geological Survey, University of Kansas, samzipper@ku.edu;
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Margaret Zimmer
(), University of California, Santa Cruz, margaret.zimmer@ucsc.edu;
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Margaret Shanafield
(), Flinders University, margaret.shanafield@flinders.edu.au;
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Kendra Kaiser
(), Boise State University, kendrakaiser@boisestate.edu;
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Sarah Godsey
(), Idaho State University, godsey@isu.edu;
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Nate Jones
(), University of Alabama, cnjones7@ua.edu;
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Ryan Burrows
(), Australian Rivers Institute, Griffith University, ryan.burrows@unimelb.edu.au;
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Meryl Mims
(), Virginia Tech, mims@vt.edu;
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Thibault Datry
(), INRAE, France, Thibault.datry@inrae.fr;
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Stephanie Kampf
(), Colorado State University, Stephanie.Kampf@colostate.edu;
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Walter Dodds
(), Kansas State University, wkdodds@ksu.edu;
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Corey Krabbenhoft
(), University of Minnesota, krabb012@umn.edu;
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Joanna Blaszczak
(), Global Water Center and Department of Natural Resources and Environmental Science, University of Nevada, Reno, jblaszczak@unr.edu;
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Michelle Busch
(), University of Oklahoma, buschmh@ou.edu;
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Adam Price
(), University of California Santa Cruz, adnprice@ucsc.edu;
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Kate Boersma
(), University of San Diego, kateboersma@sandiego.edu;
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Adam Ward
(), Indiana University, adamward@indiana.edu;
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Julian Olden
(), University of Washington, olden@uw.edu;
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George Allen
(), Texas A&M University, geoallen@tamu.edu;
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Katie Costigan
(), University of Louisiana Lafayette, costigan@louisiana.edu;
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Rebecca Hale
(), Idaho State University, halereb3@isu.edu;
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Amy Burgin
(), University of Kansas, burginam@ku.edu;
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Daniel Allen
(), University of Oklahoma, dcallen@ou.edu;
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