River rehabilitation of urban watercourses on the example of the Glinščica River in Ljubljana
- Authors: Simon RUSJAN, Rok FAZARINC, Matjaž MIKOŠ
- Citation: Acta hydrotechnica, vol. 21, no. 34, pp. 1-22, 2003.
- Abstract: Some possible solutions of remediation of river courses on a detailed description of remediation scheme for the channelized Glinščica stream in the urban area of Ljubljana are presented in the paper. The Glinščica stream has been flooding the surrounding urban areas. This is a result of the inappropriate river regulations in the past. The entire area of the stream channel is heavily degraded both from ecological and landscape points of view. Using the hydraulic computation model HEC-RAS version 3.1, two solutions for a remediation scheme for the section of the Glinščica stream channel from Jamnikarjeva street to Brdnikova street are presented. The primary goal of the proposed solutions is a normalization of discharge conditions, which fluctuate significantly during the year. A regulation of a two-stage channel is proposed. A first-stage channel conducts low summer and normal water flows, the second-stage channel is widened and conducts high flows up to floods with a return period of 100 years. The proposed regulation of the two-stage channel and the use of bioengineering techniques for bank and channel bottom stabilization would prevent the inundation of the surrounding urban areas. The proposed two-stage channel would also enable normal living conditions for water organisms. Special emphasis is also given to a proposed maintenance plan for the scheme, leaving a certain amount of vegetation in the cross section untouched. In this way a partial rehabilitation of the river corridor would be possible. Furthermore, both proposed solutions of the remediation scheme for the Glinščica stream consider the possibility to create a network of footpaths along the channel, so that the entire surrounding area could be included in the recreational area of the planned green system of the city of Ljubljana.
- Keywords: remediation of river courses, water bioengineering techniques, live building materials, river corridor, rehabilitation, two-stage watercourse channel
- Full text: a34sr.pdf