Geomorphological analysis in the assessement of slope susceptibility in reservoirs. Case studies of the Guadalquivir basin, Spain
DOI:
https://doi.org/10.21701/bolgeomin.119.4.006Keywords:
reservoir, geomorphological risk, geomorphological map, Guadalquivir basin, susceptibilityAbstract
Knowledge of conditioning factors regarding slope stability in reservoirs requires a detailed background study of the main dynamic processes acting in the surroundings of the dam. In this sense, geomorphological mapping provides excellent results in the determination of unstable slopes and their level of susceptibility. This essay analyzes the geological and geomorphological characteristics in the surroundings of Dañador, Guadalmena and Tranco de Beas reservoirs, all of them located within the basin of the Guadalquivir river. A selected area, approximately 1,500 meters wide, around each reservoir was mapped, and a detailed geological and geomorphological database was obtained for each one in which the surficial formations were represented. The analysis of the main geomorphological processes, in terms of location, characteristics and assessed level of activity, has allowed for the delimitation of those areas that could suffer changes in their safety level in the short term, thus affecting the reservoir itself. The most important ones are those derived from slope movements (rock falls, landslides), slope erosion (gullies and rills) and karstic processes (subsidence and collapses).
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