Global EditionASIA 中文雙語Fran?ais
    China
    Home / China / Environment

    Fish species on brink of extinction as water quality declines

    By Li Yang | China Daily | Updated: 2018-11-25 10:00
    Share
    Share - WeChat
    Members of a Yangtze patrol seize fishing nets placed illegally in the river in Jinzhou, Hubei. [Liu Tao/For China Daily]

    According to experts, excessive and disorderly development of water control projects has had the "gravest influence" on the waterway's ecology.

    On June 19, the National Audit Office issued a report on the ecological environmental protection of the Yangtze River Economic Belt.

    The report shows 24,100 small hydropower stations have been built along the streams and tributaries of the Yangtze in 10 provinces, of which 930 were completed before passing an environmental impact assessment. It also indicates that excessive development has caused runoffs to varying degrees in 333 rivers in the Yangtze drainage area.

    Runoffs refer to the amount of precipitation on land that ultimately reaches streams often with dissolved or suspended material.

    A national project proposed in the 1960s was launched in the '90s to transfer water and thermal power from western inland areas to coastal regions to meet the latter's fast-rising demand for electricity. Many hydropower stations were built in the '90s and early this century in the Yangtze's drainage area.

    Cao said many of these power plants were built on second-or third-class tributaries, and the installed capacity at some is only hundreds of kilowatts.

    The stations helped to alleviate the energy shortage in the 1980s and '90s. But there are so many of them that they often cause drastic changes to runoffs in the rivers.

    "The income from power generation is probably not enough to cover the losses from ecological damage to the waters," Cao said.

    Chen Yiyu, a research academician at the Chinese Academy of Sciences who studies aquatic species, told Caixin Magazine, "The problems include construction of water conservancy projects, disconnection of rivers and lakes, over-fishing, water pollution and invasion of alien species.

    "The rich aquatic biodiversity of the Yangtze is closely related to the flood plain environment and seasonal flooding on the middle and lower reaches of the river. But human activities have changed all these factors."

    Chen said there are more than 50,000 dams, of which 20,000 are hydropower stations, in the drainage basin of the Yangtze, and these have had a grave impact on the aquatic environment.

    |<< Previous 1 2 3 4 5 Next   >>|
    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
     
    免费无码国产V片在线观看| 中文字幕在线播放| 亚洲综合无码AV一区二区| 精品久久久中文字幕人妻| 精品无码人妻一区二区三区品 | 中文字幕无码精品亚洲资源网久久| 中文字幕网伦射乱中文| 超清无码无卡中文字幕| 国产成人无码av| 免费精品久久久久久中文字幕| 天堂√中文最新版在线| 精品亚洲成α人无码成α在线观看 | 亚洲AV无码专区在线播放中文| 中文字幕本一道先锋影音| 中文字幕无码毛片免费看| 久久精品aⅴ无码中文字字幕重口| 成人无码a级毛片免费| 最近中文字幕国语免费完整| 中文字幕无码精品三级在线电影| 国产精品99精品无码视亚| 日韩免费人妻AV无码专区蜜桃| 中文字幕AV中文字无码亚| 中文字幕亚洲图片| 中文字幕一区日韩在线视频 | 无码人妻精品一区二区三区99性 | 国产中文在线亚洲精品官网| 亚洲中文字幕久久精品无码喷水| 亚洲AV蜜桃永久无码精品| 最近中文字幕mv免费高清视频8| 中文字幕亚洲欧美日韩在线不卡| 国色天香中文字幕在线视频| 亚洲精品无码专区在线播放| 亚洲一本大道无码av天堂| 亚洲AV无码乱码在线观看牲色 | 久久人妻少妇嫩草AV无码蜜桃| 久久AV高清无码| AV无码免费永久在线观看| 国产自无码视频在线观看| av无码播放一级毛片免费野外| 无码8090精品久久一区| 天堂а在线中文在线新版|