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<p>Against the backdrop of increasing periods of drought in eastern Austria, two scenarios for natural water retention measures (NWRM) were examined in the Zaya watershed in Lower Austria using the SWAT+ hydrological model. The “Agricultural Management” scenario combines direct seeding with winter cover crops on approximately 50% of the arable land. The addition of the “riparian forest strips” scenario supplements these measures with 3&#xa0;to 6 m wide riparian buffer strips of deciduous trees along flowing water ways. In dry years, direct tillage increases soil moisture content in the 0–2 m layer on average by 1.7–1.9% across the Zaya watershed, improves winter wheat yields by an average of 9.3%, and slightly increases summer runoff. Riparian forest strips reduce local soil water content through increased transpiration, but have little impact on average discharge at the watershed outlet. The study shows that NWRMs have promising effects to improve infiltration and water storage, as well as increase yields, even during dry spells.</p>

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Natürliche Wasserrückhaltemaßnahmen im Einzugsgebiet der Zaya: Potenziale von konservierender Bodenbearbeitung und Uferwaldstreifen

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  • 出版模式：

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  • 发表日期：

    2026年6月19日

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  • Bano Mehdi-Schulz,
  • Viktoria Emilie Arnold,
  • Martin Tschikof

摘要

Against the backdrop of increasing periods of drought in eastern Austria, two scenarios for natural water retention measures (NWRM) were examined in the Zaya watershed in Lower Austria using the SWAT+ hydrological model. The “Agricultural Management” scenario combines direct seeding with winter cover crops on approximately 50% of the arable land. The addition of the “riparian forest strips” scenario supplements these measures with 3 to 6 m wide riparian buffer strips of deciduous trees along flowing water ways. In dry years, direct tillage increases soil moisture content in the 0–2 m layer on average by 1.7–1.9% across the Zaya watershed, improves winter wheat yields by an average of 9.3%, and slightly increases summer runoff. Riparian forest strips reduce local soil water content through increased transpiration, but have little impact on average discharge at the watershed outlet. The study shows that NWRMs have promising effects to improve infiltration and water storage, as well as increase yields, even during dry spells.