Original scientific paper

IRRIGATION NEEDS IN ADMINISTRATIVE AREA AT THE CITY OF RIJEKA

Anadrija Špoljar orcid.org/0000-0001-5420-8163 ; Visoko gospodarsko učilište u Križevcima, Križevci, Hrvatska
Ivka Kvaternjak orcid.org/0000-0001-5994-7387 ; Visoko gospodarsko učilište u Križevcima, Križevci, Hrvatska
Tomislava Peremin Volf ; Visoko gospodarsko učilište u Križevcima, Križevci, Hrvatska
Emil Cortesi ; Visoko gospodarsko učilište u Križevcima, Križevci, Hrvatska

Abstract

According to our estimation, irrigated areas in the wider area of the city of Rijeka are negligible. Therefore, more attention should be given to irrigation, especially for more profitable crops. In regard to this, potential and actual evapotranspiration according to Thorntwaite was determined and water deficiencies and surpluses in the decade since 2000. until 2009. and in the driest summer months (June, July, and August). By calculating linear trend, annual rainfalls by 2015. would be lower by 11.00 mm, while the actual water needs of plants would be higher by 36.4 mm (p>0, 05). Assuming that the downward trend in mean monthly air temperatures and increased rainfall in the summer months in the next five years should continue, there would be a slight decrease in air temperature of 0.180 C and an increase in rainfall of 15.1 mm (p>0,05). The values of actual evapotranspiration would also rise to 39.7 mm (p>0, 05). Deficiencies of water amounted to 55.6 mm in the first five-year period, and 19.6 mm in the second. The observed ten-year period indicates a number of extremely dry years with very high water deficiencies, reaching 413.8 mm in 2003. Therefore, irrigation should be given particular attention in the wider area of the city of Rijeka, especially for more profitable crops like vegetables and fruits.

Keywords

irrigation; water surpluses and deficiencies; city of Rijeka

Hrčak ID:

68974

URI

https://hrcak.srce.hr/68974

Publication date:

31.3.2011.

Article data in other languages: croatian

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