Rapid response of New England (USA) rivers to shifting boundary conditions: Processes, time frames, and pathways to post-flood channel equilibrium
| Autor: | Evan N. Dethier, Keith M. Kantack, Helen G. Doyle, Francis J. Magilligan, Carl E. Renshaw |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Hydrology
010504 meteorology & atmospheric sciences Flood myth 0208 environmental biotechnology Geology 02 engineering and technology 01 natural sciences 020801 environmental engineering New england Boundary value problem Rapid response 0105 earth and related environmental sciences Communication channel |
| Zdroj: | Geology. 47:997-1000 |
| ISSN: | 1943-2682 0091-7613 |
| DOI: | 10.1130/g46702.1 |
| Popis: | The time scale of channel recovery from disturbances indicates fluvial resiliency. Quantitative predictions of channel recovery are hampered by multiple possible recovery pathways and stable states and limited long-term observations that provide benchmarks for testing proposed metrics. We take advantage of annual channel-change measurements following Tropical Storm Irene’s 2011 landfall in New England (eastern USA) to document geomorphic recovery processes and pathways toward equilibrium. A covariate metric demonstrates that channels can adjust rapidly to ongoing boundary condition shifts, but that they adjust along a continuum of possible stable states. Moreover, the covariate equilibrium metric indicates sensitivity to warm-season high discharges that, in this region, are increasing in frequency. These data also show that the channels are resilient in that they are able to recover an equilibrium form within 1–2 yr of disturbances. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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