Naslov
Modeling of nitrate concentrations in alluvial aquifer

Autori
Kovač, Ivan ; Dobša, Jasminka ; Gusić, Jelena

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts BIOSTAT 2014 / Jazbec, Anamarija ; Pečina, Marija ; Sonicki, Zdenko ; Šimić, Diana ; Vedriš, Mislav - Zagreb : Hrvatsko biometrijsko društvo, 2014, 21-21

Skup
21st International Scientific Symposium on Biometrics

Mjesto i datum
Dubrovnik, Hrvatska, 11.06.2014. - 14.06.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
groundwater ; nitrate concentrations ; modeling ; growth functions

Sažetak
In the water supply of the city of Varazdin for many years there was a problem of too high nitrate concentrations in drinking water . The problem was solved in a way that well field where the nitrate concentration in groundwater was greatest was closed. At the same time new well fields were opened, so that today the wider area of the city of Varazdin groundwater pumped is in two locations: Vinokovščak and Bartolovec .In both well fields groundwater is pumped from alluvial strata of Quaternary age that are constructed mainly of sand and gravel . However , although the hydro geological conditions at both sites are equal, at the well field of Vinokovščak the nitrate concentrations were almost constantly increasing over the last ten years and have exceeded the maximum concentration recommended by the EU nitrate directive . Here we are modeling the annual average concentration of nitrate in groundwater at the well field Vinokovščak by polynomial functions of the first, second and third degree and by few nonlinear growth functions: general growth model, logistic function, Gompertz function and Richardson function. Since there are great oscilations in time series of nitrate concentrations, the time series is smoothed by method of moving average. Our hypothesis was that time series is going to be well adjusted to an increasing function that has asymptotic behaviour.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo, Informacijske i komunikacijske znanosti

POVEZANOST RADA