Under the leadership of Professor Lixin Wu, Academician of the International Eurasian Academy of Sciences and head of the Remote Sensing Discipline at Central South University, his research team utilized the Disaster Response System for the Belt and Road (DRS4BR). Based on the Knowledge-Driven Flood Intelligent Monitoring (KDFIM) module within this system and using Sentinel-1 and Sentinel-2 satellite imagery, the extent of flooding and the changes in the upstream and downstream reservoir water areas were extracted for October 28, 2025 (Fig. 1).

The results indicate that following the damage to the Belgorod Reservoir Dam, the upstream water area decreased significantly, with a reduction of over 529,900 m² observed. In contrast, the extent of inundation in the downstream river channel remained relatively limited, suggesting that no large-scale outburst flooding occurred. A flooded area of over 83,000 m² was detected, and the affected area was identified as entirely agricultural land. Meanwhile, the downstream reservoir area expanded markedly compared with its extent on October 16, with an increase of over 108,000 m² observed in the downstream reservoir. The continuous downstream discharge from the Belgorod Reservoir still poses a potential hydrological risk to the basin, highlighting the urgent necessity of repairing the Belgorod Reservoir Dam to ensure watershed safety.

Figure 1.Belgorod Reservoir Dam Damage Triggers Flooding: Upslream Water Shrinks, Downstream Waler Expands

（Mapping Author: Jiao Zhijun, Chen Biyan, Wang Wei, Wu Lixin）