Scholarly record

DETENTION BASINS AS KEY ELEMENTS FOR PROTECTION OF VLASINA LAKE FROM THE STORM WASTE WATER AND SEDIMENT THREAT

B. Blagojevic, O. Potic, D. Radivojevic

Abstract

Vlasina lake in Southeast Serbia is classified as an Area of Distinct Land Use. Due to high environmental protection standards, the Master Plan of the area forsees the need for high levels of protection from waste water, storm water, and sediment. The storm waste water and sediment management system implies infrastructure that consists of open channels and gutters, leading to detention basins. Prior to release into the lake, storm water and sediment from the immediate lake bank area are treated and managed within the detention basins up to the required water quality level. This paper presents hydrological, meteorological and other parameters relevant for the storm waste water drainage system design. Runoff quantity and peak flow calculations for gutters and channels along the existing roads are given, as well as volume calculation for detention basins. A calculation model and scheme are shown for the elements of the drainage system, as well as allocation of the elements within the lake protection zones. Special attention is paid to detention basin design – its structure and operational capabilities. Position and number of drainage channels and detention basins are designed according to terrain elevation, position of existing structures, storm water and sediment quantity, intensity of developement in the area, as well as present and projected land use. Wherever possible, natural ditches and gullies were used for allocation of detention basins, and drainage channels were led through existing road culverts.

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