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Simulation langfristiger Trends der Boden- und Grundwasserversauerung im Bundsandstein-Schwarzwald auf der Grundlage langjähriger Stoffbilanzen

Hinderer, Matthias (1995):
Simulation langfristiger Trends der Boden- und Grundwasserversauerung im Bundsandstein-Schwarzwald auf der Grundlage langjähriger Stoffbilanzen.
Tübingen, In: Tübinger geowissenschaftliche Arbeiten / C ; 26, [Book]

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Abstract

In the northern Black Forest area, which is geologically characterized by low carbonate to carbonate free sandstones of the Bunter Formation, the MAGIC model was applied to reconstruct and forecast the long-term acidification of ground water and soils. The simulation is based on long time measurements of element budgets in a small forested catchment (see also EINSELE & HINDERER, this vol.). The results show the delaying effect on groundwater acidification due to sulphate sorption which takes place mainly in the soil horizon. In the periglacial soil cover the highest sulphate concentration is reached 13 years, in the fractured aquifer of the sandstone formation ca. 30 years after the highest deposition. A further delaying effect is due to the storage of deposited nitrogen components by the biomass which is up to now undersaturated in nitrogen because of former intensive forest use. Main features of the historical development since 1850 are the increase of the total water mineralisation and the change in ion ratios. The weak acid anions such as hydrogen carbonate and organic acids were displaced by the strong man-made mineral acids. In the periglacial soil cover the base saturation of the exchange sites was overstressed leading to a mobilization of aluminium. Today, the acid input is higher than the proton consumption by silicate weathering (critical load for groundwater) in different areas of the northern Black Forest. Therefore further efforts to reduce the emissions of sulphur dioxide and nitrogen oxides are necessary.

Item Type: Book
Erschienen: 1995
Creators: Hinderer, Matthias
Title: Simulation langfristiger Trends der Boden- und Grundwasserversauerung im Bundsandstein-Schwarzwald auf der Grundlage langjähriger Stoffbilanzen
Language: German
Abstract:

In the northern Black Forest area, which is geologically characterized by low carbonate to carbonate free sandstones of the Bunter Formation, the MAGIC model was applied to reconstruct and forecast the long-term acidification of ground water and soils. The simulation is based on long time measurements of element budgets in a small forested catchment (see also EINSELE & HINDERER, this vol.). The results show the delaying effect on groundwater acidification due to sulphate sorption which takes place mainly in the soil horizon. In the periglacial soil cover the highest sulphate concentration is reached 13 years, in the fractured aquifer of the sandstone formation ca. 30 years after the highest deposition. A further delaying effect is due to the storage of deposited nitrogen components by the biomass which is up to now undersaturated in nitrogen because of former intensive forest use. Main features of the historical development since 1850 are the increase of the total water mineralisation and the change in ion ratios. The weak acid anions such as hydrogen carbonate and organic acids were displaced by the strong man-made mineral acids. In the periglacial soil cover the base saturation of the exchange sites was overstressed leading to a mobilization of aluminium. Today, the acid input is higher than the proton consumption by silicate weathering (critical load for groundwater) in different areas of the northern Black Forest. Therefore further efforts to reduce the emissions of sulphur dioxide and nitrogen oxides are necessary.

Series Name: Tübinger geowissenschaftliche Arbeiten / C ; 26
Place of Publication: Tübingen
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Applied Sedimentary Geology
Date Deposited: 22 Jun 2015 07:08
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Zugl.: Tübingen, Univ., Diss.

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