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| Titel |
Identification of pollutant sources in a rapidly developing urban river catchment in China |
| VerfasserIn |
Jingshui Huang, Hailong Yin, Seifeddine Jomma, Michael Rode, Qi Zhou |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250132764
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| Publikation (Nr.) |
 EGU/EGU2016-13299.pdf |
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| Zusammenfassung |
| Rapid economic development and urbanization worldwide cause serious ecological
and environmental problems. A typical region that is in transition and requires
systemic research for effective intervention is the rapidly developing city of Hefei in
central P. R. China. In order to investigate the sources of pollutants over a one-year
period in Nanfei River catchment that drains the city of Hefei, discharges were
measured and water samples were taken and measured along the 14km river section
at 10 sites for 4 times from 2013 to 2014. Overflow concentrations of combined
sewer and separate storm drains were also measured by selecting 15 rain events in
4 typical drainage systems. Loads and budgets of water and different pollutant
sources i.e., wastewater treatment plant (WWTP) effluent, urban drainage overflow,
unknown wastewater were calculated. The water balance demonstrated that >70%
of the discharge originated from WWTP effluent. Lack of clean upstream inflow
thereby is threatening ecological safety and water quality. Furthermore, mass fluxes
calculations revealed that >40% of the COD (Chemical Oxygen Demand) loads were
from urban drainage overflow because of a large amount of discharge of untreated
wastewater in pumping stations during rain events. WWTP effluent was the predominant
source of the total nitrogen loads (>60%) and ammonia loads (>45%). However, the
total phosphorous loads from three different sources are similar (∼1/3). Thus, our
research provided a basis for appropriate and prior mitigation strategies (state-of-art of
WWTP upgrade, sewer systems modification, storm water regulation and storage
capacity improvement, etc.) for different precedence-controlled pollutants with
the limited infrastructure investments in these rapidly developing urban regions. |
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