2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/25/2021 | 8:30 AM - 10:30 AM | SHORT AND LONG-TERM EFFECTS OF STORMFLOW ON STREAM METABOLISM: FREQUENT FLOODING RESULTS IN DEGRADATION OF STREAM FUNCTION AND RESPONSE | Virtual Platform
SHORT AND LONG-TERM EFFECTS OF STORMFLOW ON STREAM METABOLISM: FREQUENT FLOODING RESULTS IN DEGRADATION OF STREAM FUNCTION AND RESPONSE
Indices of stormwater management effectiveness focus on the effect actions have on the hydrologic regimes and levels of erosion mitigation in the watershed. To understand the broader implications stormwater management can have on water quality and ecosystem health, we are studying how hydrologic regimes in urban streams are linked to metrics of ecosystem function. High-frequency data from sensors placed in-stream and remote satellite data of solar irradiance were collected over a two-year study period in three streams near Cleveland, Ohio. Daily rates of gross primary production (GPP),ecosystem respiration (ER), and gas exchange velocity were estimated through inverse Bayesian modeling of dissolved oxygen dynamics. Estimates of GPP and ER provide point-comparisons of stream ecosystem function before and after storm events, and were used to quantify the resistance of production and respiration to elevated discharge. Initial results show ER to be less responsive (i.e., more resistant) to high flow than GPP, resulting in well-lit streams rarely or never experiencing days of net-autotrophic function following elevated stormflow. Disruptive stormflow events had a return frequency that was shorter than recovery intervals of GPP which indicated cumulative degradation of ecosystem function over time.
- Ecosystem functioning
- Flow regime
- Models
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Presenters/Authors
Andrew Blinn
(), Kent State University, ablinn2@kent.edu;
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Zia Ul Hassan
(), Kent State University, zhassan1@kent.edu;
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Aditi Bhaskar
(), Colorado State University, aditi.bhaskar@colostate.edu;
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Anne Jefferson
(), Kent State University, ajeffer9@kent.edu;
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David Costello
(), Kent State University, dcostel3@kent.edu;
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