2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/05/2017 | 2:30 PM - 2:45 PM | Exploring exurban influences to nitrogen dynamics in a forest basin: a simulation study with hybrid modeling approach | 301A
Exploring exurban influences to nitrogen dynamics in a forest basin: a simulation study with hybrid modeling approach
Forested mountains provide essential resources and services (e.g., clean water supply) to downstream ecosystems and human communities. Fast-growing exurbanization not only modifies terrestrial ecosystem but also aquatic ecosystem by changing nutrient input from terrestrial to aquatic. We developed a hybrid modeling approach to link a forest ecohydrological model, the Regional Hydro-Ecologic Simulation System (RHESSys), with a stream model to simulate the impacts of exurbanization on mountainside on the dissolved inorganic nitrogen (DIN) export. In this study, we focused on mountainside residential development as one type of exurbanization. We set three housing densities. Exurbanization elevated the annual discharge and annual DIN export from the terrestrial ecosystem. Elevated DIN inflow to the adjacent aquatic ecosystem accelerated in-stream decomposition and reduced in-stream DIN retention time. Similar impacts would potentially occur in further downstream reaches with amplified magnitude. Linking terrestrial ecosystem simulation with stream model provides a framework that incorporates longitudinal dynamics represented by stream network, additional to lateral dynamics (terrestrial hillslope processes), and thus helps to evaluate the impacts carried by stream network far reaching downstream.
- C06 Large River Ecology
- C22 Disturbance
- C28 Land-Water Interfaces
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Presenters/Authors
Laurence Lin
(), University of North Carolina at Chapel Hill, hrlauren@email.unc.edu;
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Jack Webster
(), Virginia Polytechnic Institute and State University, jwebster@vt.edu;
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Taehee Hwang
(), Indiana University, taehee@indiana.edu;
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Lawrence Band
(), University of Virginia, leb3t@virginia.edu;
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