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Using SWAT+ to support optimal strategies to retain and re-use water and nutrients in small agricultural catchments in Europe

Authors

Piniewski,  Mikołaj
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Schürz,  Christoph
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Čerkasova,  Natalja
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Farkas,  Csilla
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Nemes,  Attila
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Plungė,  Svajūnas
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Strauch,  Michael
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Szabó,  Brigitta
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Witing,  Felix
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Volk,  Martin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Piniewski, M., Schürz, C., Čerkasova, N., Farkas, C., Nemes, A., Plungė, S., Strauch, M., Szabó, B., Witing, F., Volk, M. (2023): Using SWAT+ to support optimal strategies to retain and re-use water and nutrients in small agricultural catchments in Europe, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3658


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020884
Abstract
Natural/Small Water Retention Measures (NSWRMs) can help to mitigate conflicts among agricultural, human and environmental water uses. They can significantly contribute to an improved water quality and an increased resilience against floods and droughts. Although potentials for water and nutrient retention are well studied, knowledge on the effectiveness of different measures is still lacking. The EU Horizon2020 project OPTAIN aims to identify efficient techniques for the retention and reuse of water and nutrients in small agricultural catchments and optimize spatial allocation and combination of NSWRMs based on environmental and economic sustainability indicators. The presentation will focus on the advancements in process-based modeling of NSWRMs using the SWAT+ model. In OPTAIN, we established a modeling protocol aiming to harmonize the SWAT+ model setup process to develop reproducible and transparent model setups and to implement a comprehensive, multi-objective and process-oriented calibration strategy involving the use of both soft and hard data. The newly developed COntiguous object COnnectivity Approach (COCOA) is able to represent features in the landscape at the field scale allowing for a more accurate representation of the measures in the model setup. The second advancement concerns a more realistic simulation of long-term dynamics of crops and a more plausible way of planning farm management operations. Preliminary results for two catchments (Upper Zgłowiączka, Poland and Schwarzer Schöps, Germany) illustrate the implementation of the modeling protocol. We demonstrate the reporting of the simulated catchment water balance and dominant runoff processes and show how selected NSWRMs perform under current and future climate.