Water hyacinth reaches river
THE water hyacinth that have flooded Suzhou Creek was spotted on Huangpu River yesterday with experts suggesting that the cooler summer weather may be the reason for the aquatic plants early outbreak in the city this year.
Marine workers have been trying to clear the invasive species from the creek as well as the river by putting up nets. Between September 6 and October 7, more than 44,000 tons of water hyacinth have been removed from the two waterways — nearly 20 times the amount during the same period last year. The amount of hyacinth removed from the Suzhou Creek is a record high for recent times.
According to Chen Liyi, an official with greenery and public sanitation bureau, the annual floral outbreak of the floating plants is usually from October to December. But this year they arrived a month earlier than usual, prompting the bureau to launch a clean-up operation from September 6 itself.
The bureau said this year’s heavy rainfall and astronomical tide meant that the city’s upstream water level remained high. As the water level receded, the water hyacinth flourishing upstream started to move downstream and into the Suzhou Creek. On Tuesday, a mass of hyacinth had blocked a part of the waterway.
A botanist said since the free-floating plant tends to grow faster in temperatures between 25 and 30 degrees Celsius, this year’s climate led to the early arrival of the plants.
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