Digitalization of flood spills for CHMI
The main motivation of the client for implementing the contract
In mid-September 2024, extensive flooding occurred in the Olomouc region. Three days after the peak of the flood wave, the actual extent of the inundation was captured using remote sensing methods. Through the digitization of flood inundation areas, the client will obtain accurate data for updating datasets of the largest natural floodplain. The data will be used for flood model evaluation and assessing the effectiveness of flood protection measures.
Project implementation
The project was divided into several key phases:
- Feasibility analysis of mapping flood extent boundaries in selected sections
- Calculation of the orthophoto mosaic
- Preparation of background data
- Visual analysis of the 2024 flood inundation based on available data
- Proposal for improving traffic conditions and parking operations
- Digitization of flood extent boundaries
Handover and verification on the client’s side
The Czech Hydrometeorological Institute was provided with digital data – line layers of flood extent boundaries in 2D and 3D, including elevation information. The client also received a technical report containing details on the surveying, data processing, and comparative previews of the available floodplain data of the largest natural flood and the actual extent of the 2024 flood.
Project information
Subject of the contract:
Digitization of the 2024 flood extent boundaries for the Vidnávka River (Vidnava area) and the Morava River (Litovel area).
Client:
Czech Hydrometeorological Institute Brno
Location:
Olomouc Region
Implementation period:
02-03/2025
Scope of the contract:
4.4 km of the Vidnávka River, 2.9 km of the Morava River
Supporting documents / Input data:
- Aerial images and LiDAR data of the flooded area were captured on September 18 and 19, 2024.
- The collected data was processed into an orthophoto mosaic.
- Data from the Digital Water Management Data Base (DIBAVOD) related to floodplains was also utilized.
