THE QUALITY OF URBAN STORM WATER IN DRAINAGE SYSTEM ON THE TERRITORY OF SARATOV
The erosion network located in the city of Saratov performs drainage functions for transporting surface and underground wastewater to the Volgograd reservoir. The underground storm sewers were built in the thalwegs of the largest ravines and gullies in the second half of the twentieth century; the other valleys play a role of open collectors to carry out atmospheric precipitation. Mass disposal of incoming industrial wastewater and the presence of unauthorized household connections lead to quality degradation of water in the Volgograd reservoir which is being used as a source of drinking water, and also for recreational and fishery purposes. Multiple excesses of standard concentration values, including oil products and heavy metals, are registered in fishery water bodies. The collectors are technically worn out and unable to cope with the peak loads at maximum precipitations. At the moment, there is no storm collector equipped with local treatment facilities in Saratov. The expansion of the city’s embankment and the perspectives of creation a new beach increase the need for compliance with hygienic and environmental requirements. The construction of treatment facilities at the major trunk storm sewers is planned to be performed in the next few years. These actions should be accompanied by technical development and re-equipment of the municipal water disposal system.