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Projection of 21st century irrigation water requirements for sensitive agricultural crop commodities across the Czech Republic
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SYSNO ASEP 0557333 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Projection of 21st century irrigation water requirements for sensitive agricultural crop commodities across the Czech Republic Author(s) Potopová, Vera (UEK-B) RID, SAI, ORCID
Trnka, Miroslav (UEK-B) RID, ORCID, SAI
Vizina, A. (CZ)
Semerádová, Daniela (UEK-B) RID, ORCID, SAI
Balek, Jan (UEK-B) ORCID, SAI, RID
Chawdhery, M. (CZ)
Musiolková, M. (CZ)
Pavlík, P. (CZ)
Možný, Martin (UEK-B) RID, SAI, ORCID
Štěpánek, Petr (UEK-B) RID, SAI, ORCID
Clothier, B. (NZ)Number of authors 11 Article number 107337 Source Title Agricultural Water Management. - : Elsevier - ISSN 0378-3774
Roč. 262, MAR (2022)Number of pages 24 s. Language eng - English Country NL - Netherlands Keywords climate-change ; impact ; drought ; model ; evapotranspiration ; europe ; land ; temperature ; management ; ensemble ; Crop water consumption ; Crop-specific irrigation requirements ; Water use indicators ; Orchards ; Vineyards ; Hop gardens ; Vegetables ; Fodder Subject RIV GD - Fertilization, Irrigation, Soil Processing OECD category Agriculture R&D Projects EF16_019/0000797 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) SS02030027 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Open access Institutional support UEK-B - RVO:86652079 UT WOS 000788788700002 EID SCOPUS 85120374087 DOI 10.1016/j.agwat.2021.107337 Annotation This study quantified the crop water consumption, crop-specific irrigation requirements, and availability of water resources to catchments under climate change in the Czech Republic (CZ). Within the SoilClim model and BILANWATERES hydrological water balance modeling process, we tried to answer the question of whether there are at least theoretical water resources in the individual catchments of the CZ that could cover possible higher demands for irrigation. An ensemble of five global climate models under the moderate representative concentration pathway (RCP4.5) from the EURO-CORDEX initiative was chosen to project the future water use indicators. The irrigation water requirement indicators for the growing season (GS) of vineyards, hop gardens, orchards, vegetables, and fodder crops were calculated in 1143 catchments for two periods, 2031-2050 (Sc1) and 2061-2080 (Sc2), compared to the observed period 1961-2020 (Obs). To project irrigation scenarios in agricultural water management, the following water use indicators were quantified: relative soil moisture at 0-40 cm (AWR1) and 0-100 cm (AWR), crop water balance (Rain-ETa), irrigation water requirement (Irrig), and the ratio of actual and reference evapotranspiration (ETratio). To assess areas with a critically low water supply and quantify the frequency of water deficit during the GS of each crop, we calculated the number of days with extreme values of water use indicators. Quantification of the extreme irrigation characteristics reflected the highest depletion of soil moisture and the highest water demands, i.e., when the assessed indicators reached the 25th percentiles. For highly marketable vegetables, the largest deficit in Rain-ETa during the GS for Sc1 was projected. If current vegetable growing areas and cropping systems remain unchanged, Irrig will increase by 10.2% by the end of the 21st century under RCP4.5. Although current potato planting areas have soils with a high available water capacity, they will become controlled by the water deficit over the next few decades. The accumulated vineyard water required suggests that 15% and 25% of irrigation water will be lost by evaporation from the soil surface during the 2030s and 2080s, respectively. However, changes in future hopyard irrigation extent and amounts may have important implications in largely cropped irrigation hotspots. In the main traditional hop region for the 2030s, we project a 25% depletion of soil moisture and an increase of ETratio < 0.4 by up to 5.3%. The projection of a high frequency of days with an ETratio < 0.4 and AWR1 < 30% for fodder crops was related to the most risk prone areas with an extreme lack of moisture in the regions with the most developed animal production. Thus, there will be insufficient fodder supply to the livestock sector due to any water stress during the production season under climate change conditions. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0378377421006144
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