2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/24/2021 | 2:00 PM - 3:30 PM | INSIGHTS ON ECOSYSTEM PROCESSES AT THE LAND-WATER INTERFACE FROM HIGH FREQUENCY DISSOLVED OXYGEN MULTI-YEAR DATA IN HYPORHEIC ZONES, HILLSLOPES AND ESTUARIES | Virtual Platform
INSIGHTS ON ECOSYSTEM PROCESSES AT THE LAND-WATER INTERFACE FROM HIGH FREQUENCY DISSOLVED OXYGEN MULTI-YEAR DATA IN HYPORHEIC ZONES, HILLSLOPES AND ESTUARIES
Dissolved oxygen (DO) dynamics at various land-water interfaces within a watershed play a critical role in catalyzing biogeochemical reactions and are affected by in-situ biological processes. Quantifying these processes requires continuous in-situ measurements at both high enough frequency to capture details such as changes in microbial respiration and long enough duration to observe annual effects. Our novel optical oxygen sensing technology provides real-time (every min) DO data from streams as well as in-situ deployments in saturated/unsaturated sediments. These continuous measurements are obtained without removal or recalibration of the probe over multiple seasons (currently up to 29 months). We report on three case studies: (i) groundwater-surface water interactions within the hyporheic zone of an alpine stream from a 15-month record of spatially resolved DO measurements directly within the stream-bed, (ii) snowmelt driven biogeochemical processes in the hillslope to floodplain continuum over three consecutive years and (iii) observation of tidally driven DO pulses in a coastal watershed. Our high frequency measurements provide insights into ecosystem scale processes from the effects of snow drought in an alpine watershed to how rapid shifts in redox state influence carbon cycling in a tidal river-floodplain.
- Monitoring
- Transport
- Carbon cycle
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Presenters/Authors
Ruby Ghosh
(), OptiO2, Inc., ghosh@optio2.com;
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Dean Shooltz
(), Opti O2, LLC, shooltz@optio2.com;
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Michael Freeman
(), Opti O2, LLC, freeman@optio2.com;
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Reza Loloee
(), Opti O2, LLC, loloee@optio2.com;
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