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Stable isotopes as a natural tracer of mixing processes of Zavoj Lake [Serbia] | Stabilni izotopi kao prirodni indikator mešanja vode Zavojskog jezera [Srbija]
2012
Veličković, J., Institut za vodoprivredu Jaroslav Černi, Beograd (Serbia) | Mitrović, T., Institut za vodoprivredu Jaroslav Černi, Beograd (Serbia) | Golobočanin, D., Institut za nuklearne nauke Vinča, Beograd (Serbia) | Miljević, N., Institut za vodoprivredu Jaroslav Černi, Beograd (Serbia)
In order to determine the stable isotope content of hydrogen (2H/1H) and oxygen (18O/16O) from surface water and the Zavoj Lake, a sampling campaign was carried out in November 2011. Vertical profiles of water samples were collected in the sections close to the dam to check whether there was any detectable influence from the inflowing Visočica River and wheter there was a vertical isotopic stratification of the lake water. Temperature gradient of up to 5.5 deg C between surface and about 60 m depth is observed. Dominant process of mixing the inflowing Visočica River and water leaking from diversion tunnel appear close to the dam.
اظهر المزيد [+] اقل [-]Numerical model for prevention of ctitical [i.e. critical] defficit [i.e. deficit] of dissolved oxygen in ponds | Numericki model prevencije kriticne kolicine rastvorenog kiseonika u sanitarnom bazenu
2008
Djordjevic, Dj.R., Gradjevinsko-arhitektonski fakultet, Nis (Serbia) | Antanasijevic, C.Lj., Gradjevinsko-arhitektonski fakultet, Nis (Serbia) | Miljojkovic, D., JP Srbija-vode, Beograd (Serbia)
One of the last stages in purification of waste water is by aquaculture pond using macro biological cells - fishes. In such outdoor ponds, oxygen depletion events can occur at anytime, but most likely to cause fish kills during summer hot weather. Aquaculture pond model can predict dissolved oxygen using small number of measurements and very simple numerical model. Alarm system can be activated urgently when the oxygen level drops below a certain concentration, depending on fish species. Such a model is realized for WWTP at Citluk coal mine, close to Sokobanja in Serbia, and explained in this paper.
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