Geomats Used to Control Erosion on Reservoir Margins in Brazilian Hydroelectric Power Plants
| Autor: | Marlon Silva Schliewe, Clever Aparecido Valentin, Marta Pereira da Luz, Jefferson Lins da Silva, Arnaldo Teixeira Coelho, Ricardo D. dos Santos Junior, Maria Alejandra Aparicio Ardila |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
Erosion control Geography Planning and Development 0211 other engineering and technologies 02 engineering and technology Aquatic Science 01 natural sciences Biochemistry Hydroelectricity Bathymetry Gabion TD201-500 021101 geological & geomatics engineering 0105 earth and related environmental sciences Water Science and Technology Hydrology Water supply for domestic and industrial purposes geomat Sediment Vegetation Hydraulic engineering sack gabion geosynthetics erosion control techniques reservoir margins Erosion Environmental science Geosynthetics TC1-978 |
| Zdroj: | Water, Vol 13, Iss 1444, p 1444 (2021) Water Volume 13 Issue 11 |
| ISSN: | 2073-4441 |
| Popis: | Erosion on reservoir margins causes losses in the production of energy in Hydroelectric Power Plants (HPPs), making it necessary to implement control techniques that ensure the reduction in sediment deposits inside reservoirs. Among these techniques, geomats (geosynthetic erosion mats) are widely used to control erosion processes in slopes and watercourses. This material protects the margins both in the short and long term, contributing to strengthening the vegetation’s roots developed in the erosion areas. This paper studies the performance of geomats (with and without sack gabion) installed in six margin sections distributed in three experimental units of the Brazilian HPPs called Porto Colômbia and Volta Grande. The geomat performance was evaluated over four years of monitoring through a qualitative evaluation matrix and differential bathymetry. The influence of ultraviolet (UV) radiation on the degradation of geomats installed in each section (natural conditions), as well as on geomat ultraviolet-aging samples in the laboratory (accelerated conditions), was also evaluated using differential scanning calorimetry (DSC). The results showed no significant difference in performance between using the erosion control technique consisting only of geomats and the technique consisting of geomats and sack gabion. The highest bathymetric difference value obtained in the present study was 1.62 m in the experimental unit VG1, controlled with geomat without the application of sack gabion on the margin. |
| Databáze: | OpenAIRE |
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