Naslov
Groundwater quality problems of a shallow alluvial aquifer in Varaždin region, Croatia

Autori
Marković, Tamara ; Larva, Ozren ; Leis, Albrecht

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Intergrating Groundwater Science and Human Well-being / Taniguchi, M., Yoshioka, R., Skinner, A., Aureli, A. - Toyama : IAH, 2008

Skup
Intergrating Groundwater Science and Human Well-being

Mjesto i datum
Toyama, Japan, 26.10.2008. - 01.11.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Alluvial aquifer; nitrates; nitrite; ammonia; pollution

Sažetak
The shallow aquifer of Varaždin region is located in NW part of Croatia and represents the source of potable water for public water supply of the city Varaždin and surrounding settlements. The aquifer is composed of gravel and sand with variable portions of silt and it is formed during Pleistocene and Holocene as the result of accumulation processes of the Drava River. Favourable hydrogeological conditions enabled development of three pumping sites – Varaždin, Bartolovec and Vinokovšćak. Natural groundwater quality is good but in the surrounding area of the Varaždin pumping site, has been observed high concentration of nitrates, nitrite, ammonia, orthophosphate, heavy metals (Ni, Pb), phenols and microbiological pollution. High concentrations of NO3-, NO2-, NH4+, PO43-, Ni, Pb and present of fecal bacteria in the shallow aquifer at the Varaždin pumping site led to gradual decreasing of groundwater abstraction rate and directed the majority of abstraction to other pumping sites.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo

POVEZANOST RADA