<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区

          Water study tackles climate issues

          China Daily | Updated: 2022-07-30 09:16
          Share
          Share - WeChat
          Li Ludan and Liu Han collect benthic samples in the source region of the Lancang River. XIAO YIJIU/XINHUA

          The river source research will face climate and geographical challenges, including low oxygen levels. Roads are rudimentary and the expedition team members will work at an altitude of more than 4,000 meters. The route covers the two source water systems of the Yangtze and the Lancang rivers.

          This scientific expedition takes glacial water lakes as the starting point to explore the relationship between glacial changes and lake water volume. Glaciers store a large amount of water and are one of the supply sources for many rivers and lakes. In particular, once the glaciers reach the "inflection point" of melting, their shrinking will be irreversible, resulting in the reduction of water inflows from rivers and lakes, which in turn brings grassland desertification, soil erosion and other ecological problems. Only by the gathering and observation of basic data can scientific countermeasures be adopted for the prevention and management of ecological risks in the source region.

          |<< Previous 1 2 3 4 5 6 7 8 Next   >>|

          Related Stories

          Top
          BACK TO THE TOP
          English
          Copyright 1994 - . 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: 99精品国产闺蜜国产在线闺蜜| 高清熟女国产一区二区三区| 国产精品美女黑丝流水| 国内少妇偷人精品免费| 免费国产午夜理论片不卡 | 麻豆成人av不卡一二三区| 久久国产自拍一区二区三区| 国内揄拍国内精品人妻久久| 精品国产乱子伦一区二区三区| 久久久久国产精品熟女影院| 国产亚洲精品久久久久久无| 亚洲色大成网站www永久男同| 亚洲成人av在线资源网| 激情文学一区二区国产区| 中文字幕在线视频不卡一区二区| 石原莉奈日韩一区二区三区| 国内不卡不区二区三区| 欧美性XXXX极品HD欧美风情| 国产精品无码素人福利不卡| 18禁成人黄网站免费观看久久| 国产99视频精品免费观看9| 亚洲av综合av一区| 国产最大的福利精品自拍| 日本一区二区三区精品国产| 午夜精品视频在线看| 精品九九热在线免费视频| 爽爽精品dvd蜜桃成熟时电影院| 欧美国产国产综合视频| 日韩黄色大片在线播放| 亚洲成熟女人av在线观看| 国产精品视频中文字幕| 四虎永久精品在线视频| 青青热在线精品视频免费观看| 亚洲中文字幕aⅴ天堂| 国产9 9在线 | 免费| 一区二区三区日本久久九| 婷婷五月亚洲综合图区| 亚洲第一福利网站在线观看| 蜜臀91精品高清国产福利| 免费人成视频x8x8国产| 动漫AV纯肉无码AV电影网|