2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/06/2017 | 11:00 AM - 11:15 AM | ALTERNATIVE MODELS OF HYDROGEOMORPHIC CONNECTIVITY IN URBANIZING PIEDMONT LANDSCAPES | 302A
ALTERNATIVE MODELS OF HYDROGEOMORPHIC CONNECTIVITY IN URBANIZING PIEDMONT LANDSCAPES
Urbanization studies have long posited a collection of impacts resulting from watershed hardening and stormwater routing that increase connection between upland landscapes and streams. Prevailing paradigms note a syndrome of biophysical impacts associated with increasing impervious cover, a common proxy for road and population density. Conceptual models, as well as restoration and mitigation designs inspired by this narrative, focus on hydrologic flashiness and storm flow as a mechanistic driver, despite increasing evidence that substantial biotic degradation occurs prior to detectable change in hydrologic metrics. We employed multi-temporal analysis of high-resolution topography during urbanization to reveal increases in hydrologic connectivity controlled by terrain re-sculpting and alteration of surface flow networks. We identified geomorphic signatures of network disconnection in forested landscapes found to be prevalent across broader regions, but that decreased markedly in agricultural or suburban settings. Collectively, our findings suggest increasingly connected hydrogeomorphic networks result from terrain modification or alteration of catchment water budgets independent of impervious surface at levels of urbanization far lower than previously described. Our results may indicate a need for highly distributed mitigation efforts at very low levels of land use intensity to better protect biotic assemblages.
- C08 Urban Ecology
- S02 Urban streams, aquatic ecology, and stormwater engineering: How do we encourage integration, opportunities and collaboration in an era of green infrastructure innovation?
- S23 Rehabilitating urban streams: perspectives from science and management
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Presenters/Authors
Matthew Baker
(), University of Maryland Baltimore County, mbaker@umbc.edu;
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Daniel Jones
(), USGS, dkjones@usgs.gov;
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Andrew Miller
(), UMBC, miller@umbc.edu;
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Ellen Woytowitz
(), UMBC, ellen6@umbc.edu;
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