How to SAVE WATER in the increasing drought prone agricultural cross-border region of Weinviertel and Southern Moravia
Coordinating recipient: Ústav výzkumu globální změny AV ČR, v. v. i.
Keywords: xxx
Annotation of project:
The ongoing climate change poses major challenges for the border region of Lower Austria and the South Moravian Region, especially in the Dyje river basin and neighboring regions. The water balance of this important and shared river catchment is already under strain, and as the dry years of 2015, 2017 and 2018 have shown, despite a robust water management system, the region has experienced massive economic damage caused by drought, particularly in agriculture, but also in forestry. The agricultural drought, which in 2018 in particular also almost immediately turned into a hydrological drought, has shown to the public administration, farmers and water managers how complicated it is (Interreg VI-A) Austria-Czechia ATCZ00048 - SaveWater Version 2.0, 11.08.2023 4 to meet the water resource demands of the different sectors during an emergency situation. Under these circumstances one of the principal rivers of the regions providing many valuable ecosystem services in the regional river catchments itself has been compromised. Moreover, projections of future climate change show that a similar situation is more likely to recur in the next few decades than at any time in the past two centuries. For this reason, there is a need to exploit opportunities for interdisciplinary and transboundary cooperation and to increase the resilience of the whole region in respect to increasing climatic water balance deficits. This project has been initiated by the Lower Austrian and South Moravian Chambers of Agriculture with the strategic cooperation of the Strategic Partners of the Government of Lower Austria, the South Moravian Region and the Morava River Basin Authority. The project has three main objectives: a) In cooperation with the two agrarian chambers and academic institutions, compile a catalogue of measures and examples of good practice aimed at specific and water-resource enhancing landscape management within the study area; b) Propose and quantify feasible and farmer-implementable measures and their proper mix to increase their resilience to drought and assess their impact on water resources in the study catchments; c) Propose and examine the feasibility of innovative and hitherto unconsidered measures such as feasible water retention or water harvesting options to better manage existing water resources and possible ways to enhance these resources in the region. The present project will make use of the outputs of two prior projects addressing the actual target region, namely the Interreg CZ-AT project "Impacts of climate change on the Dyje river basin" and the TAČR project "Adapt-Dyje - Development of a tool for identification of the main risks of water resources management in the Dyje river basin and methodology for their systemic solution under the conditions of a changing climate". These projects developed a system tool in the form of a digital twin of the Dyje river basin. However, specific measures such as the role of windbreaks, strip cultivation, increasing the number of retention measures (re-activating historical ponds, water harvesting through small-scale dams, rewetting of swamps etc.) or optimizing field crop management, mulching and cultivation methods were not and could not be assessed because of the lack of involvement of farmers from both sides of the border. Thus, the key players responsible for about 2/3 of the landscape-evapotranspiration of our target region, i.e. farmers, have so far not been involved in the formulation of measures that are feasible from their point of view. Similarly, the potential hidden in the strengthening of water management systems and their interconnections has not yet been comprehensively and substantively assessed for the entire border region. So far only measures to optimize water reserves and resources have been considered on the respective side of the border. While the measures resulting from the implementation of the first two objectives will be immediately implementable, the output of the third objective will be available as a basis for strategic discussions and cooperation between the public administrations of the two regions. The outputs of the project will be both specific methodological procedures and tools for decision-support of single or combined retention measures/water-saving options developed for farmers, training of target stakeholders (e.g. farmers and companies, advisers) by the two agrarian chambers, and the outputs of comprehensive basin analyses that will combine the benefits of the measures in the area with the quantification of the potential benefits of the measures to strengthen the water management infrastructure.