Abstract

The study is focused on the river basin of the upper Elbe and especially on the highly polluted area of northwestern Bohemia which is a part of the so-called Black Triangle area. A ten-year data set (1989–1998) of sulphur emissions, ambient air quality, atmospheric deposition and surface run-off has been evaluated. Substantial sulphur downward trend has been stated both for emissions and deposition which correlate well together. Relations between surface run-off and total deposition are discussed. Run-off chemistry of individual river basins is influenced by sulphur deposition and weathering of sulphur-rich heaps of lignite mines to a different degree. The ambient air quality has been improved in the Czech Republic, ambient air sulphur dioxide concentrations dropped and the total sulphur deposition has decreased to 50% of its value in 1989.

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