Sardoba reservoir dam failure in Uzbekistan

A glimpse of sardoba dam collapse

On May 1, 2020, a large area of the Sardoba reservoir dam in the Sirdaryo region of Uzbekistan collapsed and flooded more than 35,000 ha in Uzbekistan and Kazakhstan. Six people died and at least 111,000 were evacuated from the Syr Darya river basin.

Sardoba dam break analysis

In the present work, the deformations of the dam walls before the dam breach were evaluated using DInSAR technology.

Sardoba dam collapse

Specifically, we analyzed 27 Sentinel-1A images in descending geometry and 31 in ascending geometry, from May 2019 to April 2020.

Measurement of dam motions from the two satellite acquisition geometries allowed decomposing the motions into vertical (subsidence and uplift) and horizontal on the east/west axis. The results show a consistent pattern of deformation in the east direction of the collapsed section of the dam wall prior to failure.

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