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首页> 外文期刊>Wasser und Boden >Monitoring water quality impact due to sediment re-suspension with an in-situ measurement device
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Monitoring water quality impact due to sediment re-suspension with an in-situ measurement device

机译：使用原位测量设备监控由于沉积物重悬而引起的水质影响

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Altliough the quality of natural waters has improved remarkably over the last two decades, the quality of bottom sediments remains comparatively unimproved. Deposits of fine solids show a pronounced ability to accumulate harmful substances from theoverlying water. In case of erosion of the sediment bed these xenobiotics can be re-released. Study of the behavior of contaminated sediment has revealed adsorption/desorption characteristics of individual toxins. Biomonitoring of pollutant pressure on specific benthic organisms on the other hand can be useful to elucidate potential dangers to aquatic ecosystems. However, it is not yet known how a given contaminant-loaded sediment will respond to different hypercritical flow conditions in terms of release rates and partitioning of xenobiotica. As such, a small in-situ measurement device (EROSIMESS) was constructed, which features simultaneous determination of suspended sediment concentration (optical turbidity meter), dissolved oxygen levels, pH and temperature (membrane probes) under predefined hydraulic conditions. Samples of the suspension can be withdrawn for subsequent analysis.
机译：在过去的二十年中，尽管天然水的质量已有显着改善，但底部沉积物的质量仍未得到改善。细小的固体沉积物显示出明显的能力，可以从上方的水中积聚有害物质。万一沉积床被侵蚀，这些异生物可以重新释放。对受污染的沉积物行为的研究揭示了单个毒素的吸附/解吸特性。另一方面，对特定底栖生物进行污染物压力生物监测可有助于阐明对水生生态系统的潜在危险。但是，尚不知道给定的载有污染物的沉积物在释放速率和异生物素的分配方面将如何响应不同的超临界流动条件。因此，构建了一个小型现场测量设备（EROSIMESS），该设备可在预定的液压条件下同时测定悬浮的沉积物浓度（光学浊度仪），溶解氧水平，pH和温度（膜探针）。可以取出悬浮液样品进行后续分析。

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