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| Titel |
Changing of water status along a small stream due to urbanization |
| VerfasserIn |
Z. Gribovszki, P. Kalicz, P. Csáfordi, R. Szita, K. Sermaul |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250070530
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| Zusammenfassung |
| Considerable qualitative and quantitative changes can be generally detected in case of urban
sections of the streams as the results of strong human interventions along the stream channel
or in the drainage basin in urban areas. The water status becomes worse and the water regime
becomes more extreme. The negative changes have an effect on the broader environment and
they bring usually diminution of the biodiversity. The assessments of the above
mentioned combined effects are very important from the viewpoint of the good state of
the water systems, which is the main purpose in the European Water Framework
Directive.
Water status changing are monitored and analysed along different (natural, rural and
urbanized) sections of a small stream (Rák Brook in Sopron) taking into account the
connection of the hydrological and the water quality monitoring expediently. Seven
monitoring points are set up along the stream system of the Rák Brook from the headwaters
to the stream mouth, in designation of the points mainly focusing the change of the surface
cover and human impacts. Samples were taken on the measurement points fortnightly or for
flood-linked between the dates 01.09.2010-01.03.2012. The following features were
examined: hydro-morphological (velocity, discharge, stream bed sediment type),
physico-chemical (pH, conductivity, suspended sediment), chemical (sulphate, chloride,
COD, ammonium, nitrate, total phosphorous), and biological (makrozoobenthos)
parameters. Simple and multivariate statistical methods were used for data processing to
present the magnitude of the differences between the stream sections. Based on the
results the effect of the different degree of urbanization on the drainage basin and
the hydro-morphological interventions in the stream bed was well demonstrable. |
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