The historical durations of the Sava river and their impact on the groundwater level of Zagreb aquifer : master’s thesis

U okviru izrade diplomskog rada načinjene su analize povijesnih trajanja rijeke Save te analize razina podzemne vode zagrebačkog vodonosnika. Svrha ovih analiza bila je utvrditi hidrološki najpovoljniju godinu u povijesti s obzirom na trajanja srednjih i visokih vodostaja Save i posljedični utjecaj na razine podzemne vode zagrebačkog vodonosnika. Analize su provedene na vremenskim nizovima vodostaja rijeke Save u razdoblju od 1993. do 2015. godine na mjernoj postaji Zagreb, te na vremenskim nizovima razina podzemne vode dva piezometra,, jednog na lijevoj obali rijeke Save, a drugog na desnoj obali rijeke Save, u istom vremenskom razdoblju. Analizom razina podzemne vode utvrđen je negativan trend razina podzemne vode dok se u razdoblju od 2012. do 2014. godine primjećuje porast u razini podzemne vode zbog dužih trajanja visokih vodostaja rijeke Save, ali negativni trend razina podzemne vode i dalje se nastavlja poslije tog razdoblja.In this master thesis analyses of historical durations of the Sava river and groundwater levels of Zagreb aquifer were made. The purpose of these analyses was to establish the historically most hydrologically favorable year in regard regard to the duration of medium and high-water levels of the Sava river and the consequent influence on the groundwater levels of Zagreb aquifer. The analyzes were conducted on the time series of the Sava river water levels in the period from 1993 to 2015 at the Zagreb measuring station and on the time series of groundwater levels of two piezometers, one on the left bank of the Sava river and the other on the right bank of the Sava river in the same time period. By analysing the groundwater level, a negative trend has been identified, while in the period from 2012 to 2014 an increase in groundwater level due to the longer duration of the high Sava water levels is noted, but the negative trend of groundwater levels continues after that period