Der Kohlendioxid-Gehalt und die Kalzitsättigung der Ilm, einschließlich einiger Vergleichsuntersuchungen im Thüringer Raum |
| |
Authors: | Gottfried Proft |
| |
Institution: | Friedrich-Schiller-Universität Jena, Institut für Ökologie, Arbeitsgruppe Limnologie, Jena, Germany |
| |
Abstract: | The CO2 content, air saturation and calcite equilibrium of the River Ilm and some of its tributaries were analysed. CO2 content was measured by degasing the CO2 from water. The CO2 level is a very sensitive indicator for a low pollution in oxygen saturated waters. Clean running waters have a CO2 content close to the air saturation of 0.1–0.3 mg C l?1. Ground water and springs are rich in CO2. Polluted waters are characterised by higher CO2 contents, also organic pollution can result in high values of CO2. Carbon dioxide concentration of streams and brooks is limited by re-aeration. The headwater region (softwater) of the River Ilm is unsaturated, the hard water in the middle- and underflow is oversaturated. In summer and autumn high saturation could be found, but without autochthonous calcite precipitation like in hard water lakes. |
| |
Keywords: | River Ilm CO2 in the stream water CO2 content and pollution air saturation calcite saturation |
本文献已被 ScienceDirect 等数据库收录! |
|