Flood Damage Monitoring of Transmission Towers in Heavy Downpour in North China Based on Sentinel-1 Images

Flooding caused by extreme rainfall may cause damage to transmission towers and poses a serious threat to the safe operation of power grids. A flood damage monitoring method for transmission towers based on the High-Resolution Net (HRNet) is proposed. The water body is firstly extracted from the pre-flood and post-flood Sentinel-1 images, and the identification of flood-affected areas is then completed by differential change detection of water bodies, which is afterwards superimposed on the spatial information of the transmission towers to assess the flood damage risk level of the transmission towers. This method is applied to monitor the flood damage of transmission towers during the heavy downpour in July 2023 in North China, to assessing the damage to transmission towers and provides data guarantees for the safe operation and maintenance of the power grid. The proposed scheme provides a new approach for the identification of flood damage to transmission towers.