REVITALIZATION OF THE USTYA RIVER WITHIN THE CITY RIVNE

Abstract

The article gives an analysis of modern experience on therevitalization of small rivers converted into artificial channels in cities and other urbanized territories. Based on the analysis of the role of small rivers in the formation of urban spaces, the key principles for the restoration of small rivers are given. In particular, the revitalization of the river with maximum approximation to the level that preceded the intensive industrial development of the adjoining territories obliged to study the history of the river, to determine its historical hydrographic and hydrological characteristics, to study the changes in river basins. On the basis of this study the complex of the main factors, which led to changes in the hydrological regime of the river and as a result to of deterioration of the ecological status of the river and its floodplain, are determined. Proposed organizational measures and corresponding constructive and technological solutions to ensure the compliance of Ustya river with the main recreational andecological requirements.From the analysis of historical data it was determined that in theyears 1932-1939 significant work was carried out on clearing andfixing the channel of the Ustya River, the elimination of wetlands. Itwas made of fastening the shore by the brushwood with weaving ofverbena to form directly the channel and fixing the shores formed by sloping slopes with fastening the sowing of grasses. Obviously, the width of the channel formed in the late 30-ies of the twentieth century was no bigger than the current one, which testifies (taking into account the higher flow of water) about the greater depth of the channel and the faster flow. The revealed historical features of the formation of the channel of the Ustya River allow us to recommend restoring the hydraulic connection of the groundwater of the floodplain of the river with the channel by replacing the part of the existing reinforced concrete fastening with a historically justified fastening. The riverbed is recommended to be fastened with a perforated sheet piles and slopes – with a geogrids and cell filling with soil and sowing perennial grasses.Also, to saturate with water oxygen is recommended to create localobstacles in the form of low thresholds of natural stone. To avoidwaterlogging of the surrounding area, it is necessary to drain thewaterlogged areas of the floodplain, as well as to organize thecleaning and admission of rainwater from the adjoining territories tothe river.