Home 禄 Metro 禄 Environment
Floating fern waterway threat
By Dong Zhen |
June 15, 2011, Wednesday
|
Print Edition
Print Edition
A FLOATING water plant carried into local rivers and creeks by recent heavy rains is clogging up waterways and threatens shipping, officials warned yesterday.
Authorities have increased the number of vessels tasked with removing azolla, an aquatic fern, said the city waterway sanitation keeper.
The amount removed from the Huangpu River and local creeks since early this month is more than three times that taken out in the same period last year, according to the Shanghai Environment Industry Co Ltd, which monitors local waterway sanitation.
Managers fear the seasonal problem will be worse in Shanghai this summer because of the weather.
Droughts in many parts of the Yangtze River were followed by floods.
This sudden change in the water environment has spurred rapid growth of free-floating azolla, said Fang Xiaofeng, an official with the waterway sanitation authority.
"We have discovered that a massive quantity of the fern has been carried down to local waters since early this month," Fang explained.
Last summer, the largest surface area on local waters covered by the fern was 800,000 square meters.
But already this summer sanitation workers have reported an area of more than 1 million square meters.
Since June 8, staff have been removing 400 tons of azolla a day.
In addition to being unsightly, in clogging up waterways, the plant - which is also known as fairy moss - can cause problems for passing ferries and other vessels.
Authorities have increased the number of vessels tasked with removing azolla, an aquatic fern, said the city waterway sanitation keeper.
The amount removed from the Huangpu River and local creeks since early this month is more than three times that taken out in the same period last year, according to the Shanghai Environment Industry Co Ltd, which monitors local waterway sanitation.
Managers fear the seasonal problem will be worse in Shanghai this summer because of the weather.
Droughts in many parts of the Yangtze River were followed by floods.
This sudden change in the water environment has spurred rapid growth of free-floating azolla, said Fang Xiaofeng, an official with the waterway sanitation authority.
"We have discovered that a massive quantity of the fern has been carried down to local waters since early this month," Fang explained.
Last summer, the largest surface area on local waters covered by the fern was 800,000 square meters.
But already this summer sanitation workers have reported an area of more than 1 million square meters.
Since June 8, staff have been removing 400 tons of azolla a day.
In addition to being unsightly, in clogging up waterways, the plant - which is also known as fairy moss - can cause problems for passing ferries and other vessels.
- About Us
- |
- Terms of Use
- |
-
RSS - |
- Privacy Policy
- |
- Contact Us
- |
- Shanghai Call Center: 962288
- |
- Tip-off hotline: 52920043
- 娌狪CP璇侊細娌狪CP澶05050403鍙-1
- |
- 浜掕仈缃戞柊闂讳俊鎭湇鍔¤鍙瘉锛31120180004
- |
- 缃戠粶瑙嗗惉璁稿彲璇侊細0909346
- |
- 骞挎挱鐢佃鑺傜洰鍒朵綔璁稿彲璇侊細娌瓧绗354鍙
- |
- 澧炲肩數淇′笟鍔＄粡钀ヨ鍙瘉锛氭勃B2-20120012
Copyright 漏 1999- Shanghai Daily. All rights reserved.Preferably viewed with Internet Explorer 8 or newer browsers.
