Mehmet Berkun

Effects of inorganic metal toxicity on bod—I methods for the estimation of bod parameters—II

Abstract Metal toxicity : In this study, the effects of HgCl 2 , HgSO 4 , K 2 Cr 2 O 7 , CuSO 4 , ZnSO 4 and Al 2 (SO 4 ) 3 on BOD were investigated using a respirometer. When these inorganic metal compounds were added to a synthetic medium, respirometric BOD values and bacterial growth in an aeration system were affected. Parameter estimation: Some new solutions of the first order equation are time saving alternatives to the existing ones. Ultimate BOD values obtained from the second order equation are significantly higher than those produced from the first order equation. There is linear relationship between first and second order BOD parameters using crude sewage samples, but not when synthetic medium is used.

River sediment transport and coastal erosion in the southeastern Black Sea rivers / Transport riečnych sedimentov a erózia pobrežia riek krajiny v juhovýchodnej časti čierneho mora

In the Southeastern Black Sea Region, rivers are dammed for hydroelectric power and irrigation. The natural course of fluvial alluvium transport is almost completely altered because of planned and constructed dams and coastal protection measures. Decreasing volume of sediment carried to the sea cause intensification of the shore erosion. The Black Sea Rivers and coastal areas of Turkey and Georgia are under heavy anthropogenic pressure because of the bed material extraction and coastal erosion rate. In this study, environmental effects of dams and related effects of sediment transport on coastal erosion in the Eastern Black Sea region are discussed. Rieky v juhovýchodnej časti regiónu Čierneho mora sú prehradené priehradami, ktoré slúžia na výrobu elektrickej energie a na závlahy. Prirodzený transport plavenín a splavenín sa v dôsledku výstavby plánovaných a realizovaných priehrad takmer úplne zmenil. Znížený objem sedimentov dopravovaných do mora spôsobuje intenzifikáciu erózie brehov riek. Rieky ústiace do Čierneho mora v oblasti pobrežia Turecka a Gruzínska sú výrazne ovplyvnené ľudskou činnosťou, ako je ťažba materiálu z riek a eróziou brehov. V tejto práci sa analyzuje vplyv priehrad na životné prostredie krajiny vo východnej časti Čierneho mora.