Trends of the hydrometeorological variables in the wider area of the Zagreb aquifer

Scientific paper - Original scientific paper

• Author: Sara Bačeković
• Author: Dominik Rukavina
• Author: Zoran Kovač
• Author's institution: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Geology and Geological Engineering)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering

Abstract (english)

The aim to this paper was to estimate trends of hydrometeorological variables in a different time scales in order to see whether it will generate an indication of the impact of climate change in the wider research area. Trends were estimated on a monthly and yearly basis for precipitation, air temperature, evapotranspiration and maximum water available for infiltration at meteorological station Pleso, and for Bregana River water levels at hydrological station Koretići. Both locations are important because they can show patterns that could be characteristic for the wider Zagreb area, and are associated with Zagreb aquifer recharge. Linear regression and t-test were used for trend estimation. Monthly analysis showed ascending trends for air temperature and evapotranspiration, especially in the summer months. Descending trends for Bregana River water levels were observed when minimum and average values were considered, while statistically significant ascending trend for maximum water levels was observed only for February. Yearly trends showed similar patterns. Moreover, it was shown that evaluation of trends only on a yearly basis can sometimes hide important information. All results suggest that more dry periods should be expected, while floods could be more frequent in February. Bigger difference between high and low waters, i.e. extremes, was observed, but the results were not statistically significant. Trends showed that smaller infiltration from precipitation and reduced inflow from Bregana River to Sava River will probably result with the smaller recharge to the Zagreb aquifer, what can potentially be result of a climate change.

• Keywords (english): trend; hydrometeorological variable; Zagreb aquifer; linear regression
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Publication title: Mathematical methods and terminology in geology 2020
• Numbering: pp. 77-97
• ISBN: 978-953-6923-42-7
• URN:NBN: urn:nbn:hr:169:340514
• Publication: 2020
• Conference: Title: Mathematical methods and terminology in geology 2020 / 3rd Croatian scientific congress [on] geomathematics and terminology in geology; Location: Zagreb, Croatia; Start date: 2021-10-10; End date: 2021-10-10; Assembly type: Lecture
• Type of resource: Text
• Publisher: University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering
• Publishing place: Zagreb
• Access conditions: Open access
• Created on: 2021-01-28 13:46:38