 |
| Titel |
Application of integral pumping tests to investigate the influence of a losing stream on groundwater quality |
| VerfasserIn |
S. Leschik, A. Musolff, R. Krieg, M. Martienssen, M. Bayer-Raich, F. Reinstorf, G. Strauch, M. Schirmer |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 13, no. 10 ; Nr. 13, no. 10 (2009-10-01), S.1765-1774 |
| Datensatznummer |
250012016
|
| Publikation (Nr.) |
 copernicus.org/hess-13-1765-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| Losing streams that are influenced by wastewater treatment plant effluents
and combined sewer overflows (CSOs) can be a source of groundwater
contamination. Released micropollutants such as pharmaceuticals, endocrine
disrupters and other ecotoxicologically relevant substances as well as
inorganic wastewater constituents can reach the groundwater, where they may
deteriorate groundwater quality. This paper presents a method to quantify
exfiltration mass flow rates per stream length unit Mex of wastewater
constituents from losing streams by the operation of integral pumping tests
(IPTs) up- and downstream of a target section. Due to the large sampled
water volume during IPTs the results are more reliable than those from
conventional point sampling. We applied the method at a test site in Leipzig
(Germany). Wastewater constituents K+ and NO3− showed
Mex values of 1241 to 4315 and 749 to 924 mg mstream−1 d−1,
respectively, while Cl− (16.8 to 47.3 g mstream−1 d−1)
and SO42− (20.3 to 32.2 g mstream−1 d−1)
revealed the highest observed Mex values
at the test site. The micropollutants caffeine and technical-nonylphenol
were dominated by elimination processes in the groundwater between upstream
and downstream wells. Additional concentration measurements in the stream
and a connected sewer at the test site were performed to identify relevant
processes that influence the concentrations at the IPT wells. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|