News excerpt:
Giant tree patterns appeared on the frozen Qiantang River in east China's Zhejiang Province amid a continuing cold wave.
More details on news:
- The rise and fall of tides result in the natural formation of forest patterns on the mud flats, also known as "tidal trees."
- The mudflats and sandbanks of the Qiantang River started to freeze due to the cold weather.
- With the tides washing away the sediment and the inflow of seawater, the rare scene was then formed in freezing temperatures.
About Qiantang River
- The Qiantang River runs for more than 500 kilometers through Zhejiang, passing through the provincial capital Hangzhou before flowing into the East China Sea via Hangzhou Bay south of Shanghai.
- The river is known for having the world's largest tidal bore, which is called the "Silver Dragon" locally.
- The tides usually reach their peak between the 15th and the 18th days of the eighth lunar month.
Tidal bore
- A tidal bore occurs along a coast where a river empties into an ocean or sea. A tidal bore is a strong tide that pushes up the river, against the current. A tidal bore is a true tidal wave.
- It is a surge. A surge is a sudden change in depth. When a channel suddenly gets deeper, it experiences a positive surge. When a channel suddenly gets shallower, it experiences a negative surge.
- Not all coasts feature tidal bores. In fact, there are few places where tidal bores occur.
- Some other examples of tidal bore- Batang River in Malaysia and Amazon River in Brazil have a tidal bore called Pororoca.
