Slope deformations

As part of its role in performing the state geological survey, the Czech Geological Survey (CGS) has long been dedicated to monitoring and assessing slope deformations, which represent a significant geological hazard. Key activities include engineering-geological mapping, recording and documentation of landslide phenomena, preparing expert reports and analyses, as well as archiving and processing related materials.

The mapping results are stored in the CGS information system’s text and graphical databases. Information about areas affected by slope deformations is available to the public via the Landslide Deformations map application.

CGS has been systematically mapping slope deformations since 1997. All activities are conducted in accordance with the current methodology and represent an important tool for land protection, crisis management, and spatial planning.

Provided Services

Data Outputs

We provide data outputs from the Landslide Deformations Register upon request and by arrangement with CGS experts – see Contacts.

Territorial Analytical Documents

These documents are provided exclusively to public authorities for the preparation of spatial planning documentation (referred to as “territorial data” under § 64 of the Building Act). More information is available on the Data Provision page.

Good to Know

• Requests are accepted only via e-mail at: podatelna@geology.cz or via data box: siyhmun
• For consultations, use the contacts listed on this page or the Ask a Geologist service.
• Some outputs may require extended processing time.
• Expert opinions and assessments for specific landslide sites are prepared only upon request from public authorities (e.g. state agencies, local or professional administrations) and are provided by the Regional Geologists Administration.

RENS project

Since 2020, CGS has been implementing the Rock Environment and Mineral Resources (RENS) project under the “Environment for Life” programme (TA CR). The project focuses on research and evaluation of the rock environment, natural resources, and geological hazards throughout the Czech Republic.

One of its key outcomes is the unique national Inventory of Slope Deformations, which combines newly collected field data with historical records from the former Inventory of Slope Instabilities (1962–2011). The project also develops modern methods for collecting data on slope processes and making them accessible to the public.

The RENS project provides essential inputs for geological risk prevention, landscape protection, and the sustainable use of natural resources in line with the principles of sustainable development.