ADVICE ON URGENT REMEDIATION MEASURES FOR NEWLY ACTIVATED LANDSLIDES IN GORAŽDE CITY

Abstract

During 2020 and 2021, some landslides that had been activated in Goražde city threatened to have an impact on private houses and infrastructure facilities. In order to solve this problem efficiently and as soon as possible, it was necessary to determine the factors on site and to provide advice for urgent remediation measures, i.e. the activities that should be undertaken in order to stabilize the slopes permanently. This paper will briefly present three activated slopes, their statuses and the advice for the activities on stabilisation. The most difficult task was to determine the trigger of the landslides occurrence, which was, unfortunately, mostly of an anthropogenic character, either due to the impact of structure to the stability or due to untimely stabilisation after the change of balance force in the slope. The first landslide was activated in the Obarak settlement, at the very entrance to town Goražde, on a slope above private building. The lanslide occured during construction as a consequence of a slope cut performed without any subsequent securing. Groundwater and surface water, whose presence in the area has been known since before, have a significant impact on landslide's activation. The second case is in the Pijesak settlement. In detailed research, it has been determined that the trigger is water reservoir located at the top of the slope, behind the house. Unused, excess water seeped over the basin and slope and thus activated the landslide. The third landslide is in the Čitluk settlement, where a large water spring is located above the building with a flow over 1 l/s. The water is collected by the reservoirs poorly. A significant quantity of water flows down the slope uncontrollably. The water saturates the landslide, triggering its movement towards the building at the bottom of the slope. The proposed solutions and advice will be described in detail in the paper.