Articles | Volume 26, issue 19
https://doi.org/10.5194/hess-26-5051-2022
https://doi.org/10.5194/hess-26-5051-2022
Research article
 | 
11 Oct 2022
Research article |  | 11 Oct 2022

Effect of topographic slope on the export of nitrate in humid catchments: a 3D model study

Jie Yang, Qiaoyu Wang, Ingo Heidbüchel, Chunhui Lu, Yueqing Xie, Andreas Musolff, and Jan H. Fleckenstein

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Latest update: 27 Mar 2024
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Short summary
We assessed the effect of catchment topographic slopes on the nitrate export dynamics in terms of the nitrogen mass fluxes and concentration level using a coupled surface–subsurface model. We found that flatter landscapes tend to retain more nitrogen mass in the soil and export less nitrogen mass to the stream, explained by the reduced leaching and increased potential of degradation in flat landscapes. We emphasized that stream water quality is potentially less vulnerable in flatter landscapes.