Detection and mapping of ground deformations of anthropogenic sinkholes (2020-02-14)

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Activation date: 2020-02-14 <br>
Event type: Other <br>
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Activation reason: <br>
The scope is the assessment of the sinkhole risk in the mining area of Solotvyno, Zakarpattya region, Ukraine, in continuation of the previous service EMSN-030. A systematic salt mining began in the second half of the 18th century with up to eight salt mines in operation. Although the flooding with ground water and the erosion of subsoil salt layers began in the early 2000s, the extraction of salt had not been completely stopped until 2010, when in December 3000m³ of land collapsed.The aim is to provide an up-to-date situational picture based on i) VHR satellite imagery and on ii) a time series analysis of SAR data to identify dimension and velocity of the land surface deformations as input for further modelling and preparedness actions within the ImProDiReT project (DG ECHO).Proposed solution and resultsUpdate of reference data and LULC, including sinkholes, craters and landslidesDInSAR time series analysis for 2016 -2019 based on Sentinel-1 data applying the SBAS methodologyDelineation of potential subsidence areas and compilation of risk zones   Landslide risk (pattern) and subsidence risk analysis (filled) from 2016 to 2020 Time series of displacement covering 2016-2019 in Sentinel-1 descending mode <br>
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