The state geological service provided by the Czech Geological Survey includes activities concerning slope deformations, such as field work (engineering geological mapping), inventory and classification of reports and assessments, and their subsequent archiving. An essential part of the work involves the processing and storage of results in graphic and text databases and the creation of outputs for the public, which are presentations of areas affected by slope deformations.
Slope deformations
Related applications
Slope deformation of the nature of earthflow in Jarcová village (Vsetín District).
|
Author: Jiří Nečas
Slope deformation of the nature of rockfall – rock avalanches in Vír village.
|
Author: Jiří Nečas
Methodology
All work activities are carried out according to the ““, which was approved in 2022.
The uniformly developed methodology with new components pursues the following objectives:
- Well-arranged presentation of the information value of published information (metadata)
- Presentation of primary and mainly interpreted data to public authorities, professionals, and the public
- Updates of attribute tables for geodatabase maps and records and addition of newly monitored types and properties of slope deformations, including field inventory form updates
- Long-term active and targeted updates of slope deformation data, editing and refinement of data
- Links to national systems (Unified Environmental Information System, crisis management system)
- Connection to pan-European systems (INSPIRE, global information and data infrastructures)
All data are stored centrally and it is anticipated that application solutions for their storage and handling will be developed to enable data acquisition, data content queries, download of partial data, and so forth. Map services represent a traditional and very efficient way of using information and allow for information from an inventory to be viewed in combination with other user-selected map information. An example of a comprehensive map depiction of a complex slope deformation is the Czech Republic‘s largest landslide Bohyně with an area of 13 km2, located in the Děčín District.
Simplified depiction of the entire Bohyně landslide in the digital terrain model of the Czech Republic, 5th generation (DMR 5G).
|
Author: Vladimíra Krejčí
Engineering geological map of stability conditions of the Bohyně area.
1 – active landslides. 2 – inactive landslides (inactive within the past 12 months). 3 – abandoned and relict landslides. 4 – block in landslide (up to 50 m in size). 5 – massive block in landslide. 6 – alluvial cone. 7 – natural outcrop. 8 – river terrace sediments. 9 – inactive main scarps. 10 – active main scarps. | Author: Vladimíra Krejčí
1 – active landslides. 2 – inactive landslides (inactive within the past 12 months). 3 – abandoned and relict landslides. 4 – block in landslide (up to 50 m in size). 5 – massive block in landslide. 6 – alluvial cone. 7 – natural outcrop. 8 – river terrace sediments. 9 – inactive main scarps. 10 – active main scarps. | Author: Vladimíra Krejčí
History
Data on some landslides, recorded thus far in the older Inventory of Slope Instabilities, were continuously acquired and updated in 1962–2010. The Czech Geological Survey has been systematically mapping slope deformations since 1997, when extreme rainfall in July triggered several thousand landslides causing considerable material damage in the Czech Republic. The Inventory of Slope Instabilities, whose documented data are continuously supplemented and updated, was developed to thoroughly record the aforementioned landslides.
RENS project
In 2020, the Czech Geological Survey commenced work on the “Rock Environment and Minerals (RENS)“ project of the Technology Agency of the Czech Republic (Programme of Applied Research, Experimental Development and Innovation in the Field of Environment – Environment for Life), whose primary goal is to study, monitor and evaluate the rock environment, natural resources, geohazards and geological information throughout the Czech Republic. The project will include the development of innovative methodologies for collecting data on various types of slope deformations and for providing target users with information. A unified and unique Inventory of Slope Deformations will be compiled in the Czech Republic and also include data collected during previous years in the Inventory of Slope Instabilities in addition to newly acquired data. However, new registration numbers will be used to record individual slope deformations.
Organizational aspects
All landslide-related information and outputs are provided as follows:
- Mapping and documentation material at various scales, including documents for engineering geological maps at 1:25,000, are provided by the staff of the Applied Geology Department.
- Land-use analysis documents for municipalities with extended scope and regions, and landslide maps for regions (digital data output module) are provided by the staff of the central data warehouse.
- Expert assessments concerning individual sites, including the Operational Programme Environment, are provided by the Regional Geological Administration within the scope of the state geological service.