Related News
Home » Metro » Public Services
Wetland can improve water quality of reservoir
By Zha Minjie |
June 18, 2013, Tuesday
|
Online Edition
Online Edition
SHANGHAI is restoring a wetland ecosystem around the Qingcaosha Reservoir, the main source of drinking water for the city's 13 million-plus residents.
Experts noticed signs of eutrophication – excessive nutrients in a lake or other body of water due to run-off of fertilizers and sewage from the land – in the country's largest reservoir earlier this year.
The reservoir also faces the threat of saltwater intrusion from the East China Sea during certain months of the year.
The city's water authority has done some experiments to reduce the growth of algae in the reservoir by restoring wetland around the reservoir and introducing algae-eating fish.
"We face constant pressure from upstream pollutions," said Shen Yichen, general manager of Chengtou Raw Water Co, the operator of the reservoir.
More than 20,000 monitoring items are collected each day from the reservoir, which provides 80 percent of tap water to downtown districts, Shen said.
The city is also looking for new water sources by building reservoirs further upstream, for instance, in the Taihu Lake, instead of pumping water directly from navigation channels, water officials said.
Experts noticed signs of eutrophication – excessive nutrients in a lake or other body of water due to run-off of fertilizers and sewage from the land – in the country's largest reservoir earlier this year.
The reservoir also faces the threat of saltwater intrusion from the East China Sea during certain months of the year.
The city's water authority has done some experiments to reduce the growth of algae in the reservoir by restoring wetland around the reservoir and introducing algae-eating fish.
"We face constant pressure from upstream pollutions," said Shen Yichen, general manager of Chengtou Raw Water Co, the operator of the reservoir.
More than 20,000 monitoring items are collected each day from the reservoir, which provides 80 percent of tap water to downtown districts, Shen said.
The city is also looking for new water sources by building reservoirs further upstream, for instance, in the Taihu Lake, instead of pumping water directly from navigation channels, water officials said.
- About Us
- |
- Terms of Use
- |
-
RSS - |
- Privacy Policy
- |
- Contact Us
- |
- Shanghai Call Center: 962288
- |
- Tip-off hotline: 52920043
- 沪ICP证：沪ICP备05050403号-1
- |
- 互联网新闻信息服务许可证：31120180004
- |
- 网络视听许可证：0909346
- |
- 广播电视节目制作许可证：沪字第354号
- |
- 增值电信业务经营许可证：沪B2-20120012
Copyright © 1999- Shanghai Daily. All rights reserved.Preferably viewed with Internet Explorer 8 or newer browsers.
