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ARS Home » Northeast Area » Beltsville, Maryland (BARC) » Beltsville Agricultural Research Center » Hydrology and Remote Sensing Laboratory » Research » Publications at this Location » Publication #400584

Research Project: From Field to Watershed: Enhancing Water Quality and Management in Agroecosystems through Remote Sensing, Ground Measurements, and Integrative Modeling

Location: Hydrology and Remote Sensing Laboratory

Title: Attributing the drivers of runoff decline in the Thaya River basin

Author
item FISCHER, M. - Czech Globe - Global Change Research Institute
item PAVIK, P. - Collaborator
item VIZINA, A - Collaborator
item BERNSTEINOVA, J. - Czech Globe - Global Change Research Institute
item PARAJKA, J. - Vienna University Of Technology
item Anderson, Martha
item REHOR, J. - Czech Globe - Global Change Research Institute
item IVANCICOVA, J. - Czech Hydrometeorological Institute
item STEPANEK, P. - Czech Globe - Global Change Research Institute
item BALEK, J. - Czech Globe - Global Change Research Institute
item HAIN, C - Nasa Marshall Space Flight Center
item TACHECI, P. - Collaborator
item HANEL, M. - Czech University Of Life Sciences Prague
item LUKES, P. - Czech Globe - Global Change Research Institute
item BLAHOVA, M. - Mendel University
item ZAHRADNICEK, P. - Czech Globe - Global Change Research Institute
item MACA, P. - Czech University Of Life Sciences Prague
item RAPANTOVA, N. - Collaborator
item FENG, S. - University Of Arkansas
item JANAL, P. - Collaborator
item ZEMAN, E. - Czech Globe - Global Change Research Institute
item ZALUD, Z. - Mendel University
item TRNKA, M. - Mendel University

Submitted to: Journal of Hydrology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/30/2023
Publication Date: 6/18/2023
Citation: Fischer, M., Pavik, P., Vizina, A., Bernsteinova, J., Parajka, J., Anderson, M.C., Rehor, J., Ivancicova, J., Stepanek, P., Balek, J., Hain, C., Tacheci, P., Hanel, M., Lukes, P., Blahova, M., Zahradnicek, P., Maca, P., Rapantova, N., Feng, S., Janal, P., Zeman, E., Zalud, Z., Trnka, M. 2023. Attributing the drivers of runoff decline in the Thaya River basin . Journal of Hydrology. 48. Article e101436. https://doi.org/10.1016/j.ejrh.2023.101436.
DOI: https://doi.org/10.1016/j.ejrh.2023.101436

Interpretive Summary: The Thaya river basin supports a wide range of water resource needs in the Czech Republic, from agriculture, to forest health, to municipal consumption. However, due to the close balance between annual precipitation and evapotranspiration in this region, the basin is vulnerable to changes in the prevailing climate. Climate change adaptation and mitigation efforts are under consideration, but effective response requires a good understanding of the regional hydroclimate. This study investigates a wide range of in situ and remotely sensed observations regarding precipitation, snow cover, evapotranspiration, and vegetation dynamics within the basin to provide a holistic assessment of regional land-water-climate dynamics and trends. The analysis suggests trends in increasing air temperature and evaporative demand and decreasing runoff. In addition, positive trends in remotely sensed vegetation indices indicate increasing water requirements. The results of this study indicate that complex adaptions to climate change will be needed to sustain the water-dependent sectors operating in the Thaya river basin characterized by an increasing aridity. These measures must reflect the different hydro-climate relationships that exist across elevation gradients, as well as shifting water and energy limits on evaporative fluxes.

Technical Abstract: Study Region: The water from Thaya river basin provides an essential source for the regional water balance and multiple water uses in the transboundary region of Lower Austria and Southern Moravia. It belongs to one of the most vulnerable river basins in the region, sensitive to climate change due to its small precipitation ('' ) to reference evapotranspiration ('''''') ratio. Study Focus: The main objective is to analyse the changes in water balance parameters, i.e. actual evapotranspiration ('''' ), '' and runoff (''''), and their drivers for the period 1981–2020 and 2001–2020 in case of more recent remote sensing datasets. New Hydrological Insights for the Region: The analyses confirmed previously reported increasing trends in air temperature (''''), '''''',and no trends in '' . Although not significantly, '''' consistently increased during spring and decreased during summer. This was associated with a significant increase of spring vegetation development followed by summer stagnation. The spring '''' showed significantly decreasing trends, especially in the uplands water source areas. The correlation analysis revealed a different behaviour along the altitude gradient with uplands generally limited by available energy whilst lowlands by available water in spring. In summer, however, the entire basin is often limited by water, with more pronounced limitation in lowlands. Complex adaptions measures reflecting the different hydro-climate relations across the altitudinal gradient will be needed to sustain the water dependent sectors operating in the Thaya river basin facing increasing aridity.