Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1029/2021GL096833
Licence creative commons licence
Title (Primary) Functional multi-scale integration of agricultural nitrogen-budgets into catchment water quality modeling
Author Yang, X.; Rode, M.; Jomaa, S.; Merbach, I.; Tetzlaff, D.; Soulsby, C.; Borchardt, D.
Journal Geophysical Research Letters
Year 2022
Department ASAM; BZF
Volume 49
Issue 4
Page From e2021GL096833
Language englisch
Topic T5 Future Landscapes
Data and Software links
Keywords Fertilization experimental data; Crop N uptake conceptualization; Fully distributed catchment modeling;Integrated agri-environment functioning; Climatic variability; Targeted mitigation measures
UFZ wide themes TERENO; MOSES;
Abstract Diffuse Nitrogen pollution from agriculture maintains high pressures on groundwater and aquatic ecosystems. Further mitigation requires targeted measures that reconcile agricultural interests in environmental protection. However, the agriculture-related processes of catchment N modeling remain poorly defined due to discipline-specific data and knowledge gaps. Using field-experimental data, crop N uptake responses to fertilizer management were parsimoniously conceptualized and integrated into a catchment diffuse-N model. The improved catchment modeling further facilitated integration with agricultural budget-based assessments. The integrated analysis in a mesoscale catchment disentangled contrasting agri-environment functional mechanisms in typically flashy chemodynamic and transport-limited chemostatic export regimes. Moreover, the former was actively responsive to inter-annual climatic variability and agricultural practices; the latter exhibited drought-induced enhancement of N enrichment, which could likely be mitigated through reduced fertilization. This interdisciplinary integration of data and methods provided an insightful evidence base for multi-sector targeted measures, especially under cumulative impacts of changing climate and fertilizer-use intensities.
Persistent UFZ Identifier
Yang, X., Rode, M., Jomaa, S., Merbach, I., Tetzlaff, D., Soulsby, C., Borchardt, D. (2022):
Functional multi-scale integration of agricultural nitrogen-budgets into catchment water quality modeling
Geophys. Res. Lett. 49 (4), e2021GL096833