男女羞羞视频在线观看,国产精品黄色免费,麻豆91在线视频,美女被羞羞免费软件下载,国产的一级片,亚洲熟色妇,天天操夜夜摸,一区二区三区在线电影
  Home>News Center>China
       
 

Weather project aims to moisten dry land
(China Daily by Liang Chao)
Updated: 2004-02-28 00:45

Facing persistent drought, the worst natural calamity for China's economy and ecosystem, the country is set to launch extensive weather modification operations to seek extra precipitation from water-droplet clouds.

"Large-scale weather modification operations, mostly cloud seeding and hail suppression using airplanes, aircraft guns and special rocket launchers, will be widely adopted to enhance precipitation in upstream areas of large reservoirs and cradles of major rivers," a leading weather official announced Friday.

"Cloud seeding or artificial rain-making, hail and fog-dispersing techniques will also be used to help improve ecosystem and control forest fires, secure freeway transportation and success of key social events like the Beijing 2008 Olympic games and the 2010 Shanghai World Expo," Qin Dahe, the top official at the China Meteorological Administration, said Friday during a national conference in Beijing aimed at co-ordinating such operation.

"The scope of China's weather modification is ranked as the first of its type in the world today with strong government financial backing," Qin said.

Last year, 413 million yuan (US$49 million) was injected into the operation.

In 2003 alone, more than 3,800 rocket launchers, about 7,000 antiaircraft guns and many airplanes were put into use for various weather modification operations to enhance precipitation in more than 1,800 counties throughout China. More than 35,000 people were involved.

Qin made it clear that, "in the years ahead, such operations will enable China to exploit more water resources from the sky to combat drought."

This was viewed by experts that attended the conference as "an important turning point" for the drought-relief and ecosystem improvement plan.

China's per capita water resources share is only about one-quarter of the world average.

The situation has been worsened by extensive drought.

"The country's annual shortage of water is up to 40 billion cubic metres today. Drought has, since 1990, hit about 27 million hectares of farmland or 20 per cent of the total each year, cut down grain output by 24 million tons or 4.7 of the country's total," according to E Jingping, vice-minister of water resources.

To mitigate the losses, a total of 4,231 artificial rain-making operations used airborne silver-iodide flame seeding devices to enhance precipitation in areas up to 3 million square kilometres between 1995 and 2003.

Cloud seeding over large areas was also done with thousands of antiaircraft guns and rockets that fired shells filled with catalysts like dry ice.

Such operations can enhance precipitation up to 24 per cent, according Mao Jietai, a leading expert working on national co-ordination of cloud seeding operations.

Such operations have led to 210 billion cubic metres of precipitation in many arid areas across China during the 1995-2003 period.

To date, hail dispersals using antiaircraft guns and rockets have been successfully introduced into China's 23 provinces and municipalities to help 410,000 square kilometres of drought-stricken area.

Over the past nine years, it was estimated that more than 34 billion yuan (US$4 billion) worth of potential hail damage was prevented by such operations.

Total funds earmarked by the central and local governments for such operation have amounted to 2.2 billion yuan (US$265 million) during the period.

 
  Today's Top News     Top China News
 

Office: Beijing watches Taiwan developments closely

 

   
 

State tightens farmland protection

 

   
 

Doctor starts 49-day fast to test TCM regimen

 

   
 

Fighting follows Afghan minister's killing

 

   
 

China values military ties with neighbors

 

   
 

Dads ask: 'Is this my child?'

 

   
  Three Gorges Dam Project sparks new relocation
   
  Long March III A chosen for lunar mission
   
  Education key to ending sex trade
   
  China values military ties with neighbors
   
  Going-west still a top development strategy
   
  Office: Beijing watches Taiwan developments closely
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  News Talk  
  Are the Chen-Lu shootings a fabricated hoax or an amateurish bungling  
Advertisement
         
主站蜘蛛池模板: 南阳市| 通榆县| 上虞市| 遂昌县| 西乌珠穆沁旗| 红桥区| 衡水市| 精河县| 永顺县| 丹阳市| 滦平县| 邛崃市| 托克逊县| 蒙阴县| 乐业县| 钟山县| 文安县| 彭山县| 西盟| 古交市| 尉犁县| 永宁县| 郴州市| 宁海县| 巫溪县| 灌云县| 喀什市| 建平县| 乐昌市| 改则县| 陆良县| 望都县| 台南市| 逊克县| 佛坪县| 长治市| 淮安市| 葵青区| 西畴县| 慈利县| 灵石县| 旬阳县| 搜索| 云和县| 师宗县| 尚志市| 宁安市| 云南省| 故城县| 西丰县| 时尚| 大厂| 嘉峪关市| 壤塘县| 达孜县| 萝北县| 元氏县| 赤水市| 砀山县| 浦北县| 鄂温| 本溪| 乌拉特中旗| 华蓥市| 泗水县| 克东县| 塔城市| 高台县| 漳平市| 吉木萨尔县| 大理市| 旌德县| 静安区| 绥滨县| 峨眉山市| 永济市| 上虞市| 乐业县| 华蓥市| 营山县| 永仁县| 彰化市|