www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

   
 

Quake lake still poses big threat

(China Daily)
Updated: 2008-06-09 08:35

MIANYANG, Sichuan: Water in the Tangjiashan quake lake in Sichuan province was rising Monday despite the increased outflow through a channel.


A bird's eye view of the Tangjiashan quake lake, where soldiers and engineers widened and deepened the diversion channel on Saturday so that water could flow out more rapidly. Inset: An explosion is triggered in the diversion channel of the lake to clear debris and allow freer flow of water. [China Daily]

Rescue workers completed widening and deepening the drainage channel early on Saturday.

But "the drainage plus natural leakage from the lake is about 25 cu m per second, while the inflow is 4.6 times greater", said Zhang Ting, head of the Sichuan provincial hydro-meteorological bureau.

"The impact of the inflow on the lake dam is not obvious, though." The water level yesterday evening was 742.11 m above the sea level, still 1.74 m above the sluice, and the volume exceeded 242 million cu m.

"Increasing the outflow of water is critical for the dam's safety," Zhang said. "If the water flows too slowly, the inflow will increase the pressure on the dam. But again, too voluminous an outflow can erode the diversion channel and cause the dam to collapse."

A moderate rainfall around 6:50 pm was followed by a 4.8 magnitude aftershock a minute later yesterday. The tremors that lasted 20 seconds caused massive landslides on the surrounding mountains, a Xinhua reporter at the dam said.

Experts are trying to determine the impact of the aftershock on the dam, though there was no apparent change in the flow of water, the reporter said.

Earlier, military engineers fired missiles to blast the boulders in the channel to increase the flow of water from the lake.

The quake lake was formed when landslides triggered by the May 12 quake blocked the flow of the Jianjiang River.

"Generally speaking, work on the lake's drainage is going well, but it still poses a danger to the hundreds of thousands of people living downstream," said General Ge Zhenfeng, deputy chief of the General Staff of the People's Liberation Army (PLA), who is supervising the project.

"It will take us a few days to eliminate the potential danger," he said.

Rao Xiping, head of the Beichuan hydro-meteorological station, however, said the lake dam was stable as water continued to flow out.

"We have not detected any obvious expansion in the mouth of the sluice or fissures in the dam," said Rao. His station staff and the soldiers working under him have been monitoring the dam day and night.

About 600 armed policemen and soldiers worked for six days and nights to complete the 475-m diversion channel. Some soldiers are still working with 30 bulldozers and excavators to widen and deepen the sluice further.

They have dug a second channel, and are working on a third, for which about 60,000 cu m of earth and boulders had to be cleared, said Liu Yongjian, a PLA officer, in charge of the channel work.

   1 2   


Top China News  
Today's Top News  
Most Commented/Read Stories in 48 Hours
主站蜘蛛池模板: 欧美日韩高清不卡一区二区三区 | 九九99靖品 | 在线视频欧美日韩 | 草草草影院 | 九九热久久免费视频 | 国产成人精品视频一区二区不卡 | 99爱视频精品免视看 | 狠狠色丁香婷婷综合小时婷婷 | 亚洲精品无码不卡在线播放he | 欧美专区一区二区三区 | aaa一级特黄 | 亚洲成人精品 | 色悠久久久久综合网伊人男男 | 欧美1314性欧美| 久久精品午夜视频 | 又摸又揉又黄又爽的视频 | 日本免费视频观看在线播放 | 草草视频免费观看 | 粉嫩高中生的第一次在线观看 | 久久久久久国产精品免费免 | 视色4setv.com| 国产蜜汁tv福利在线 | 欧美a欧美1级 | 久久在线国产 | 国产精品成人免费视频 | 国产成人免费网站在线观看 | 日本久久草 | 波多野结衣免费观看视频 | 精品国产呦系列在线看 | 免费看美女无遮掩的软件 | 日本www色视频成人免费网站 | 精品一区二区三区18 | 成人在线精品视频 | 美女脱了内裤张开腿让男人桶网站 | 久久久国产99久久国产首页 | 久久久久一区二区三区 | 亚洲精品15p | 婷婷亚洲久悠悠色在线播放 | 午夜免费一级片 | 国产男女爽爽爽爽爽视频 | 日韩一区二区精品久久高清 |