久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

Baiyangdian brought back to life in Hebei

Pollution control pays off as water quality improves in North China's largest freshwater lake

By Hou Liqiang in Xiong'an, Hebei | China Daily | Updated: 2024-04-01 10:04
Share
Share - WeChat
Tourists admire a pond of lotus flowers at Baiyangdian Lake in July. HE LUQI/FOR CHINA DAILY
An environmentally friendly tourist boat plies its trade on Baiyangdian Lake in April last year. CHINA DAILY

Pollution control

As the area surrounding Baiyangdian industrialized, its water resources were strained and the lake suffered from drought and pollution caused by industrial runoff.

Chemicals carried by sewage poisoned the water and lake beds, decimating the aquatic life.

According to Xiong'an's department of ecology and environment, the quality of water in the lake was below Grade V, the worst in the country's five-tier quality system for surface water, in 2017.

Thanks to a series of measures that have been taken since the establishment of Xiong'an, the quality of water in the lake reached Grade III in 2021, and has stayed at that level for the past two years.

Yang Shan, an official with the department, said the improvement has occurred thanks to efforts to control the sources of pollution and intercept pollutants before rolling out measures for ecological remediation.

As a low-lying lake, Baiyangdian receives water from many small watercourses. This means that some pollutants may be carried into the lake from outside Xiong'an, especially during the rainy season.

As part of the efforts to address the problem, Yang said two constructed wetlands were built so that water from outside Xiong'an could be purified before flowing into Baiyangdian.

The official listed a series of measures Xiong'an authorities have taken to prevent wastewater generated inside the new area from entering Baiyangdian.

Currently, there are 7 sewage treatment plants in Xiong'an, the total daily capacity of which is 249,000 metric tons.

The quality of treated wastewater from these plants, which have been upgraded or built following high standards, can all reach Grade III, he added.

Water with a quality of Grade III is good enough for most aquatic organisms to survive.

To enhance rain and sewage diversion, 79 km of pipes were upgraded in urban areas in Anxin, Xiongxian and Rongcheng, Yang said.

In rural Xiong'an, all sewage disposal facilities have been upgraded. But as the aquatic environment in Baiyangdian keeps improving, these small facilities may not be enough to treat wastewater to the quality of water in the lake, he said.

To solve the problem, the treated wastewater from these small facilities is being diverted into ponds in 10 newly built rural parks, instead of being directly discharged into Baiyangdian, he said.

To further improve the ecological environment of the lake, 741 fish farms were cleared in 2018, Yang said. Following that, dredging has taken place from 2019 to last year, removing more than 11.9 million cubic meters of mud from the lake.

"Currently, both pollution control and ecological remediation programs are being conducted in Baiyangdian. But there have been increasingly fewer projects on pollution control, and this means that the pollution treatment work in the lake has almost been completed," he said.

In another move to help bring Baiyangdian back to life, a water replenishment program was launched in 2018, according to the Xiong'an government.

Over 5.9 billion cubic meters of water have been diverted into the lake, of which the South-to-North Water Diversion Project contributed 574 million tons.

Tian Yuan, an official with Xiong'an's department of construction and traffic management, said Baiyangdian is being supplemented by reclaimed water from sewage treatment plants.

Such reclaimed water is being discharged into water bodies that empty into Baiyangdian at a speed of 2 cubic meters per second, she said.

Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
主站蜘蛛池模板: 亚洲社区在线观看 | 日韩欧美高清在线观看 | 中文精品99久久国产 | 日韩经典欧美精品一区 | 一区二区三区在线播放视频 | 精品日韩在线视频一区二区三区 | 午夜手机看片 | 国产综合成人亚洲区 | 久久是精品| 福利视频美女国产精品 | 美女叉开腿让男人捅 | 黄a 大片a v 永久免费 | 免费播放欧美毛片欧美aaaaa | 亚洲欧洲日韩在线 | 精品视频一区二区 | 国产日韩亚洲不卡高清在线观看 | 碰碰久久 | 日本在线亚洲 | 美国一级毛片oo | 国产成人久久精品二区三区牛 | 亚洲欧美另类色妞网站 | 久久精品国产亚洲7777 | 精品成人| 一级免费看片 | 日本一级全黄大片 | 国产高清一级视频在线观看 | 欧美日韩一区二区三区高清不卡 | 久久国产成人亚洲精品影院老金 | 99精品国产免费久久国语 | 国产精品久久久精品视频 | 欧美日韩顶级毛片www免费看 | 99久久精品国产一区二区三区 | 免费视频成人国产精品网站 | 国产乱码一区二区三区四 | 中文字幕va一区二区三区 | 欧美老头老太做爰xxxx | 亚洲免费视频网 | 亚洲综合自拍 | 日本三级网站在线观看 | 农村寡妇偷毛片一级 | 国产精品自拍第一页 |