Sustainable flood protection: Bregenzerach between nature and security

Sustainable flood protection: Bregenzerach between nature and security

Die Bregenzerach, a picturesque place for walks, cycling and other leisure activities, is the focus of flood protection measures. These are not only important for nature conservation and local recreation, but also crucial for the safety of the residents. In cooperation with the state and the federal government, plans for the further expansion of flood protection along the Bregenzerach are developed.

The existing water development concept provides to make the Bregenzerach between the Kennelbach gorge and the mouth of Lake Constance. The first construction phase, which led from the Harder bridge to the mouth, has already brought good results. Here the river was redesigned so that it has more space, and the earlier use of concrete blocks has long been forgotten. Nature and habitat have recovered, which contributes to an increase in biodiversity.

Planning for the next construction phase

The planning for the next section between the Harder Bridge and the Kennelbach gorge are now in full swing. When designing the new flood protection, attention is paid to the protection of the groundwater. New findings show that the soil under the Bregenzerach is porous in this section and loses water, which could affect the groundwater level. Areas of up to 100 meters on the side of the river are comprised.

This Situation requires particularly careful planning, since an excessive groundwater level can result in severe consequences such as basement overflowing, while a stand that is too low damages the vegetation and affects the functionality of well. In the coming months, there will therefore be working on the clarification of these challenges in close cooperation with the water management department of the State of Vorarlberg and external experts.

further measures and experiments

In order to obtain reliable planning bases, various measures are planned. This includes comprehensive measurements and groundwater simulations, but also a practical "real test". In a small area, snap slots are created in order to better assess the effects of the planned construction operation on the groundwater. The results of these exams are promised in the middle of next year, which should offer the basis for the subsequent clarification of the plans.