Abstract
Specific features of water quality formation are considered for the Yauza R. flowing in an urbanized drainage basin containing Moscow City and nearest Moscow region. It has been found that the deep transformation of the natural hydrographic network along with diffused pollution from sources scattered over its basin have an adverse effect on water quality formation in the urban watercourse and its self-purification potential. The current ecological state of the river can be evaluated as unsatisfactory, notwithstanding the water protection measures taken in its basin. The existing system for managing the urban surface runoff has been analyzed. It is shown that monitoring the volumes and formation conditions of pollution runoff from the urban territory is not effective enough for an objective estimate of the environmental conditions of water bodies and reduces the efficiency of water protection measures.
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