Showing papers by "Swiss Federal Institute of Aquatic Science and Technology published in 1975"
TL;DR: In this paper, a general one-dimensional equation for interstitial transport in accumulating and compacting sediments under non-steady state conditions is derived, which can be evaluated based on data from a single sediment core.
52 citations
01 Sep 1975
TL;DR: In this paper, the authors trace the marked wastewater by echosounding and reveal that the usual discharge method is unsuitable for lake water discharge, since the wastewater flows more or less to the depth of its own density.
Abstract: Treated wastewater discharged into a lake should be introduced below the trophogenic layer. Tracing the marked wastewater by echosounding revealed that the usual discharge method is unsuitable. The wastewater flows more or less to the depth of its own density, which is usually in the trophogenic layer. If there is no movement, that is, current in the water body, the wastewater accumulates at the pipe's mouth. A continuous current is therefore an indispensable prerequisite for a wastewater discharge site. It is only when wastewater is mixed with at least five parts of lake water that it does not rise more than two meters.
46 citations
01 Sep 1975
TL;DR: In this paper, it was shown that the ratio of the rates of substrate transports from the flowing wave on to cell surfaces and of active transports in substrate uptake is a determining factor for selfpurification rates.
Abstract: Experiments in model rivers on selfpurification in function of the concentrations of pollutants and of flow velocity have indicated that the ratio of the rates of substrate transports from the flowing wave on to cell surfaces and of active transports in substrate uptake is a determining factor for selfpurification rates. This ratio is decreasing rapidly with decreasing flow velocities of the water. The results were discussed on the basis of the kinetics of active transports.
4 citations
01 Sep 1975
TL;DR: In this article, the effects of simulated water level fluctuations on northern pike fry produced by pumped-storage operations were examined, showing that daily fluctuations of 10 cm caused a significant increase in the daily mortality rate.
Abstract: The effects of periodic, simulated water level fluctuations on northern pike fry produced by pumped-storage operations were examined. Daily fluctuations of 10 cm caused a significant increase in the daily mortality rate. Waves reduced the detrimental effect of water level lfuctuations, at least during the adhesive phase of fry.