『Abstract
This paper presents a general discussion of the interplay between
model structure and hydrologic parameters in the context of denitrification
estimation using coupled hydro-ecosystem models at a watershed
scale. Given the key role played by hydrology in denitrification
models, sensitivity analysis of hydrologic parameters is needed
to determine both uncertainty in denitrification estimates and
to suggest how measured data, such as streamflow, can be effectively
used to reduce this uncertainty. This paper contributes to the
broad goal of sensitivity analysis by examining the linkage between
landscape tessellation, calibration, and the ability of models
to capture hot-spot contributions to watershed scale denitrification
across a range of N-loading. For a small mid-Atlantic forested
watershed, denitrification estimates using RHESSys (regional hydro-ecologic
simulation system) are compared across different strategies for
calibration and landscape tessellation. Results demonstrate the
utility of several potential approaches to account for hydrologically
mediated hot-spots within landscapes.
Keywords: Calibration; Denitrification; Eco-hydrology; RHESSys』
Introduction
Model description
Study site
Calibration approach
Results
Discussion
Conclusions
Acknowledgments
References