DBPapers
DOI:10.5593/SGEM2013/BC3/S12.005

ASSESSMENT OF IMPACTS ON WATER QUALITY CAUSED BY SHORT-TERM STORM DISCHARGES FROM URBANIZED CATCHMENT

M. Sokac, Y. Veliskova, V. Dubova
Monday 5 August 2013 by Libadmin2013

References: 13th SGEM GeoConference on Water Resources. Forest, Marine And Ocean Ecosystems, www.sgem.org, SGEM2013 Conference Proceedings, ISBN 978-619-7105-02-5 / ISSN 1314-2704, June 16-22, 2013, 39 - 46 pp

ABSTRACT

Sewerage network in Slovakia could be very often characterized as systems with absence of centralized or decentralized retention and detention elements, thus from hydraulic point of view it is necessary to discharge a large part of the stormwater through combined sewer overflows (CSO’s) directly to the receiving water. This approach is, of course, lead to a deterioration of water quality in receiving water bodies.
This paper presents a model study, which analyzed the possible strategies of stormwater management in urban catchments within the present legislative framework in Slovakia.
The presented case study is focused on stormwater runoff modeling from urbanized catchments through sewer system to the receiving water and analyzes its effect on water quality in the receiving water.
In this case, the pollution load on receiving water and its water quality deterioration takes relatively short time, so it is analyzed using IDF (intensity – duration - frequency) curves, reflecting the short-term deterioration of water quality. The IDF curves are presented for all scenarios of urbanized catchment stormwater management.
The results of presented model study points out to the limitations of the current legislation approach, as well as the effectiveness of different stormwater management measures (scenarios) for urbanized catchments in terms of their impact on water quality on the receiving water.

Keywords: receiving water, stormwater runoff, modelling, water quality