日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

US EUROPE AFRICA ASIA 中文
China / Society

Former landfill transformed into lush landscape

By Zheng Xin (China Daily) Updated: 2012-12-12 07:50

Landscape architects have restored a former construction waste landfill into a spectacular natural area with waterfalls and vibrant greenbelts.

The ecological rehabilitation of the 140-hectare site in Beijing has been completed ahead of the ninth China International Garden Expo.

"At Splendid Valley, what was the foul and rotten has been transformed into something rare and ethereal," said Hua Weijun, deputy director of the expo's planning office.

Duan Muqi, deputy director of planning and design at the Chinese Society of Landscape Architecture, and the person responsible for the Splendid Valley project, said this is the first time the city has turned a landfill this size into a scenic spot.

Duan said in addition to selecting trees resistant to harsh conditions, including Chinese pine, his team has done a lot of work to improve the barren soil, which is mainly sand and gravel mixed with construction waste.

Because of the large amount of the waste, the committee has left the trash underground and covered it with layers of fertile soil.

"To ensure trees survive on a landfill is very challenging, let alone that the area covers a total of 140 hectares," he said. "When we first studied the soil, we were surprised to find that it simply couldn't hold water, and even grass would not survive. We had to replenish it with arable soil."

The project team used earth to transform some pits, which easily lead to soil and water loss, into valleys, and left some to store water.

As Splendid Valley covers a vast area, the rainfall collected will irrigate many trees, Duan said.

"It's hard to imagine that the big bunker, 30 meters deep and covering 20 hectares, has become a valley of flowers and greenery," he said. "We're now planning to plant more than 12 million trees and flowers around the valley."

To make sure the trees survive, Duan said advanced technology, including water-permeable bricks, vertical greening and rainfall and flood utilization systems, are being installed at the site.

Hua said the landfill was formed in the 1970s. More than 2,000 junkmen used to gather there, establishing an illegal dwelling area that made the whole area filthy.

To improve the ecological situation at the landfill, experts decided to use it as an example of how they can return a destroyed area to nature, and then hold an expo on the site displaying their achievements.

Highlights
Hot Topics

...
主站蜘蛛池模板: 91丨九色丨丰满人妖 | 久久精久久 | jizz日韩 | 日韩精品福利视频 | 成人午夜网 | 日本特黄一级片 | 免费看黄色一级视频 | 久久国产香蕉视频 | 日韩视频专区 | 亚洲一二区视频 | 成年人激情网站 | 精品99在线 | 久久色网站 | 狠狠干狠狠操 | 欧美a∨亚洲欧美亚洲 | 在线看黄色av | 欧洲三级在线 | 国产成人精品久久久 | 四虎影院最新网址 | 国产精华一区二区三区 | 色在线看 | 国产啊v在线观看 | 超碰在线免费97 | 91琪琪| 日韩国产精品毛片 | 久久久美女视频 | 国产一区二区三区影院 | 午夜激情一区 | www.黄色网址 | 日韩毛片在线免费观看 | 精品国产乱子伦 | 国产片91 | 性欧美又大又长又硬 | 一区二区网站 | 久久中文在线 | 欧美成人精品欧美一级 | 亚洲一区在线播放 | 青青草原国产在线观看 | 成人激情在线 | 日韩精品片 | 一级肉体全黄裸片 |