初步查明洪水来自源头时现代冰川区，是由于冰川前进阻塞河道，形成冰坝湖、堰塞湖，其溃决酿成大洪水所致。
It was found that the flood, coming from the modern glacier area of the source, was caused by breaking of ice-dam and coffer-dam lakes formed by blocking of river with glacier movement.
初步查明洪水来自源头时现代冰川区，是由于冰川前进阻塞河道，形成冰坝湖、堰塞湖，其溃决酿成大洪水所致。
It was found that the flood, coming from the modern glacier area of the source, was caused by breaking of ice-dam and coffer-dam lakes formed by blocking of river with glacier movement.
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