Projection of 21st century irrigation water requirements for sensitive agricultural crop commodities across the Czech Republic

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F22%3A00557333" target="_blank" >RIV/86652079:_____/22:00557333 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41210/22:91644 RIV/60460709:41330/22:91644 RIV/00020711:_____/22:10154701

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0378377421006144" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0378377421006144</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.agwat.2021.107337" target="_blank" >10.1016/j.agwat.2021.107337</a>

Result language

angličtina

Original language name

Projection of 21st century irrigation water requirements for sensitive agricultural crop commodities across the Czech Republic

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

40101 - Agriculture

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Agricultural Water Management

ISSN

0378-3774

e-ISSN

1873-2283

Volume of the periodical

262

Issue of the periodical within the volume

MAR

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

24

Pages from-to

107337

UT code for WoS article

000788788700002

EID of the result in the Scopus database

2-s2.0-85120374087