• ZIEHER, Thomas (Projektleiter)

Operandum

OPEn-air laboRAtories for Nature baseD solUtions to Manage hydro-meteo risks

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Thomas ZIEHER
arbeitet als PostDoc Researcher am Institut für Interdisziplinäre Gebirgsforschung


The Institute of Interdisciplinary Mountain Research is partner in the H2020 funded project OPERANDUM (OPEn-air laboRAtories for Nature baseD solUtions to Manage environmental risks). The overall objective of OPERANDUM is to reduce hydro-meteorological risks in European territories and beyond through co-designed and tested innovative green and blue/grey/hybrid Nature-Based Solutions (NBS), and push business exploitation, using the living lab concept through seven European and three non-European Open-Air Laboratories (OALs). OPERANDUM’s OALs cover a wide range of hazards, considering different climate projections, diverse land use and socio-economic characteristics, multiple monitoring activities, and varying levels of NBS acceptance and technology readiness. The project aims to provide science-evidence for the efficacy of NBS and best practices for their design based on participatory processes. It plans to engage multiple stakeholders from the local community up to the international level to leverage the widest possible NBS acceptance and to promote its diffusion as a good practice. Moreover, the project intends to establish a framework for strengthening NBS-based policies according to local legislation and to create European leadership in the technology and innovation of NBS. One of the OALs is led by the Institute of Interdisciplinary Mountain Research. The Austrian OAL is located in Tyrol and characterized by landslide activity in the form of a deep-seated gravitational slope deformation (DSGSD), which has recently shown active movement in the order of 4cm/a. This landslide activity creates risks for houses, infrastructure and agricultural land. Various monitoring activities, including displacement monitoring, water and snow depth monitoring, meteorological monitoring, and hydrogeological monitoring are ongoing in the OAL in collaboration with local partners. The institute will co-develop a NBS strategy together with stakeholders and plans to monitor its effectiveness afterwards. The OPERANDUM consortium consists of 26 partners from 12 European countries plus China and Australia. The partners come from diverse backgrounds, including universities and research institutes, Small and Medium-sized Enterprises (SMEs) and large enterprises, public authorities, environmental organisations, and international bodies, and bring a wide range of knowledge and expertise to the project.

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Austrian Academy of Sciences Press
A-1011 Wien, Dr. Ignaz Seipel-Platz 2,
Tel. +43-1-515 81/DW 3420, Fax +43-1-515 81/DW 3400
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Spatial assessment of probable recharge areas – investigating the hydrogeological controls of an active deep-seated gravitational slope deformation

    Jan Pfeiffer, Thomas Zieher, Jan Schmieder, Thom Bogaard, Martin Rutzinger, Christoph Spötl

Operandum, pp. 2219-2237, 2022/07/12

OPEn-air laboRAtories for Nature baseD solUtions to Manage hydro-meteo risks

doi: https://doi.org/10.5194/nhess-22-2219-2022


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doi:https://doi.org/10.5194/nhess-22-2219-2022

Abstract

Continuous and slow-moving deep-seated landslides entail challenges for the effective planning of mitigation strategies aiming at the reduction of landslide movements. Given that the activity of most of these landslides is governed by pore pressure variations within the shear zone, profound knowledge about their hydrogeological control is required. In this context, the present study presents a new approach for the spatial assessment of probable recharge areas to better understand a slope’s hydrogeological system. The highly automated geo-statistical approach derives recharge probability maps of groundwater based on stable isotope monitoring and a digital elevation model (DEM). By monitoring stable isotopes in both groundwater and precipitation, mean elevations of recharge areas can be determined and further constrained in space with the help of the DEM. The approach was applied to the Vögelsberg landslide, an active slab of a deep-seated gravitational slope deformation (DSGSD) in the Watten valley (Tyrol, Austria). Resulting recharge probability maps indicate that shallow groundwater emerging at springs on the landslide recharges between 1000 and 1650ma.s.l. In contrast, groundwater encountered in wells up to 49m below the landslide’s surface indicates a mean recharge elevation of up to 2200ma.s.l. matching the highest parts of the catchment. Further inferred proxies, including flow path length, estimated recharge area sizes, and mean transit times of groundwater, resulted in a profound understanding of the hydrogeological driver of the landslide. It is shown that the new approach can provide valuable insights into the spatial pattern of probable recharge areas where mitigation measures aiming at reducing groundwater recharge could be most effective.