One of the large valleys coming to Medina. It is said that its waterway started from Al-Taef, where several valleys gather on the road to reach Medina from its north eastern side, passing through the south of Mount Uhud, heading westwards, slightly leading to the north to meet Al-Aqiq Valley at Zaghaba. The estuary is at waterways gathering spot. Historical sources mention that it ran into huge flood several times. People feared it would overrun Medina. In some sources, it was named the waterway of Hamza, as it passes through Uhud area. Sources also mention that its waterway had changed in east Medina in 654H, as numerous climate changes took place in that year, where Medina witnessed rains and earthquakes, and a huge volcano erupted in the tips of Waqim black mountain land. Qanat Valley flooded and threatened Medina from the east. However, the lava outflowing from the volcano blocked its waterway towards Medina, so it shifted northward, and behind it a great lake was formed, which remained live for several years, with lots of underground water in farms. The valley ran a little northward, away from residential areas, then continued its waterway to the south of Uhud. Its waterway exists today, and floods when rain is heavy.
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