English
聯系我們
網站地圖
郵箱
舊版回顧



全球大河僅三分之一可自由奔流

文章來源:科技日報 劉海英   發布時間:2019-05-10  【字號:     】  

  《自然》雜志上最新發表的一項研究顯示,世界上較長的246條河流中,目前僅有三分之一還能保持全程自由流動,越來越多的水壩和水庫正在減少健康河流為全人類提供的多種利益。

  這是科學家有史以來第一次對地球上河流自由流動的狀況進行評估。來自世界自然基金會(WWF)等機構的34名研究人員組成的國際團隊,利用衛星圖像和其他數據,對世界范圍內總流程達1200萬公里的河流的連通狀況進行了分析。他們發現,在全世界長度超過1000公里的246條河流中,僅有37%的河流還能不受阻礙地自由流動;在91條長度超過1000公里的入海河流中,只有21條還能保持從源頭到海洋的貫通。這些尚能自由流動的河流主要流經北極圈、亞馬遜和剛果盆地等偏遠地區;而在人口密集地區,只有伊洛瓦底江、薩爾溫江等少數大河還能自由流動。

  研究人員指出,全球河流形成了一個錯綜復雜的網絡,與土地、地下水和大氣有著重要聯系。自由流動的河流對人類和環境都很重要,不僅支撐淡水魚的繁衍,為數億人提供糧食安全保障,還能提供足夠多的沉積物,防止耕地流失,并維系豐富的生物多樣性。擾亂這些河流的連通性,往往會減少甚至消除其帶給人類和自然的各種好處。

  該研究還指出,水壩和水庫是全球河流連通性喪失的主要原因。目前全世界已建成的大型水壩有近6萬座,正在規劃或建造的大壩則超過3700座,這些人為設施讓許多江河無法自由奔流。此外,氣候變化也威脅著全球河流的健康,溫度上升已經影響到河流的流動模式、水質和生物多樣性。

  新研究提供了跟蹤自由流動河流狀況的數據和方法,有助于各國協調戰略,維護或恢復河流連通性。WWF科學家米歇爾·蒂米指出,目前許多國家致力于發展低碳經濟,迫切需要開發可再生能源,水電成為一個重要選擇,但考慮到河流及人類的可持續發展,規劃良好的風能和太陽能可能是更好的選擇。




(責任編輯:侯茜)

附件:

專題推薦

相關新聞


© 1996 - 中國科學院 版權所有 京ICP備05002857號  京公網安備110402500047號  聯系我們

地址:北京市三里河路52號 郵編:100864

小彩牛www.xcn1.com www.654183.com | www.936725.com | www.965913.com | 9019.biz | 565258.com | 468728.com | 122026.com | 大赢家彩票平台www.068671.com | 网易彩票www.506953.com | www.38xj.com | www.70ey.com | www.113903.com | www.158479.com | www.388160.com | www.739491.com | www.03id.com | www.52vv.com | www.zz60.com | www.0243.in | www.63267.com | www.088674.com | www.139084.com | www.264644.com | www.358756.com | www.620762.com | www.838191.com | 340163.com | www.29zi.com | www.8198.com | www.53779.cc | www.080522.com | www.143147.com | www.465429.com | www.501127.com | www.552032.com | www.587107.com | www.663864.com | www.899421.com | www.897366.com | www.878531.com | 580327.com | 739869.com | 500彩票www.330691.com | 彩客网www.530255.com | www.je53.com | www.25be.com | www.7689.cc | www.22759.com | www.41770.com | www.025571.com | www.576324.com | www.581575.com | www.630023.com | www.794828.com | www.805089.com | 63198.com | 974503.com | 362139.com | wt42.com | 063216.com | 471618.com | 万利www.32123c.com | www.8762.vip | www.27869.cc | www.39189.cc | www.52120.com | www.022156.com | www.233254.com | www.259271.com | www.331727.com | www.377360.com | www.633809.com | www.753552.com | www.709019.com | www.873666.com | 254732.com | www.493248.com | 032132.com--032132.com | 655203.com | 079005.com | 大赢家彩票网www.54400r.com | 彩神网www.csw288.com | www.ko50.com | www.34ri.com | www.84pj.cc | www.299305.com | www.259627.com | www.287235.com | www.252544.com | www.229066.com | www.267718.com | www.346312.com | www.533191.com | www.561930.com | www.634605.com | www.843828.com | www.994192.com | www.949769.com | www.772116.com | www.778397.com | www.604996.com | www.779496.com | www.815993.com | 939771.com | www.gg52.com | www.3700.wang | www.72528.com | www.119785.com | www.202091.com | www.276100.com | www.348336.com | www.586206.com | www.680072.com | www.788767.com | www.942805.com | 8067.cc | 786718.com | 3317.net | www.gz22.cc | www.39qs.com | www.38997.cc | www.87381.com | www.133021.com | www.473051.com | www.579425.com | www.724556.com | www.o74.net | www.64tn.com | www.4186.cm | www.9983.in | www.67171.com | www.144441.cc | www.641594.com | 539707.com | 804880.com | 大赢家彩票平台www.632750.com | www.bt55.com | www.fm99.com | www.05eu.com | www.42zu.com | www.75nz.com | www.98pu.com | www.19822.cc | www.51798.com | www.63821.cc | www.087025.com | www.790380.com | www.816664.com | 73bg.com | ki74.com | www.50uo.com | www.97xe.com | www.8624.vip | www.30999.com | www.000522.com | www.030747.com | www.089005.com | www.176221.com | www.560615.com | www.616497.com | 788945.com | 546579.com | 341511.com | 535692.com | 500万彩票www.98528h.com | www.398597.com | www.612655.com | www.832239.com | www.863349.com | 56987.com | 057050.com | 829365.com | 博友彩www.580667.com | www.cv41.com | www.218.cc | www.23225.com | www.053643.com | www.274669.com | www.292432.com | www.668577.com | www.930270.com | www.889926.com | www.957881.com | www.961247.com | 264228.com | 353743.com | 949045.com | www.cp95.cc | www.od25.com | www.15kq.com | www.9748.biz | www.15318.cc | www.22994.cc | www.106728.com | www.137617.com | 237968.com | 740234.com | 500彩票www.50024p.com | 653096.com | 233845.com | 776005.com | 861711.com | 636351.com | www.982648.com | www.919497.com | www.812000.com | www.751854.com | www.673501.com | www.585009.com | www.518596.com | www.456674.com | www.801220.com | cp527.com | 540340.com | 091020.com | 350彩票www.350zf.com | 福彩网www.60007r.com | www.cd7.cc | www.mh08.com | www.v63.biz | www.29jx.com | www.66zd.com | www.60735.com | www.055312.com | www.116928.com | www.155408.com | www.350182.com | www.398455.com | www.855595.com | www.996067.com | 368.gg | 110651.com | 848549.com | 692739.com | 608904.com | 幸运彩票www.5095t.com | 开心彩票www.361706.com | www.qk5.com | www.tp93.com | www.s61.top | www.41pl.com | www.9158.org | www.9734.cc | www.64432.com | www.143316.com | www.260398.com | www.301923.com | www.404177.com | www.670234.com | www.676193.com | www.710107.com | www.685081.com | www.684041.com | www.938085.com | 217283.com | www.lq8.com | 天下彩www.634679.com | www.k52.org | www.d65.com | www.72ow.com | www.034960.com | www.302117.com | www.362880.com | www.869659.com | 734835.com | 053521.com | 683083.com | 796475.com | 793076.com | 乐发彩票www.223559.com | www.11tl.com | www.60548.com | www.287329.com | www.331476.com | www.689898.com | www.881715.com | www.07sy.com | www.xa96.com | www.gk73.com | www.tc85.com | www.dz83.com | www.hf2.cc | www.5486.org | www.3135.cn | www.80gq.com | www.m06.tv | www.10823.com | www.6034.biz | www.87oj.com | www.0bb.cc | www.d90.cn | www.iw77.com | www.h32.space | www.20ii.com | www.uz38.com | www.fp76.com | www.sj02.com | www.hr50.com | www.49sg.com | www.1759.xyz | www.13390.com | www.21237.cc | www.07577.com | www.9149.cm | www.6260.vip | www.3176.top | www.6879.biz | www.9424.cc | www.7245.cm | www.7842.vip | www.4420.org | www.019672.com | www.69853.com | www.302718.com | www.086081.com | www.32288.cc | www.65xi.com | www.80816.cc | www.237562.com | www.141307.com | www.181503.com | www.287585.com | www.438566.com | www.358745.com | www.756683.com | www.727215.com | www.961785.com | www.873728.com | 48bs.com | www.963796.com | www.833602.com | www.728885.com | www.637932.com | www.724498.com | www.876462.com | 331482.com | 747073.com | 05sw.com | www.982598.com | www.873695.com | 323568.com | 413311.com | www.c47.win | www.ng62.com | www.rw11.com | www.kk34.com | 99彩www.996563.com | 748208.com | www.cp7867.com | 633230.com | www.411638.com | 984075.com | 彩多多www.78949b.com | JJ彩票www.52005.cc | 366725.com | 979387.com | 946324.com | 027953.com | 803516.com | www.988526.com | www.939052.com | 947647.com | www.976255.com | www.847226.com | www.863217.com | www.938866.com | www.770615.com | www.755095.com | www.675146.com | www.652271.com | www.654509.com | www.870634.com | 657275.com | www.934759.com | www.773789.com | www.651755.com | www.877269.com | 13v6.com | www.947079.com | www.790636.com | www.788748.com | www.657757.com | www.630332.com | www.603489.com | www.467764.com | www.325577.com | www.206878.com | www.103665.com | www.091119.com | www.019993.com | www.44137.cc | www.4742.cn | www.83xv.com | www.tm61.com | www.24vc.com | www.5889.vip | www.52kt.cc | www.976.date | www.2176.shop | www.0105.net | www.7269.in | www.83rn.com | www.0232.cn | www.55668.com | www.52832.com | www.61269.com | www.9205.vip | www.5059.cn | www.3409.pw | www.00678.cc | www.3911.net | www.21xw.com | www.au21.com | www.036575.com | www.413886.com | www.813910.com | www.724918.com | www.667447.com | www.636520.com | www.586532.com | www.210212.com | www.199680.com | www.177125.com | www.361468.com | www.557763.com | www.730638.com | www.635819.com | www.855914.com | www.887966.com | 500766.cc | 450249.com--42230.com | 599306.com | www.978549.com | www.906090.com | www.808336.com | www.737173.com | www.743903.com | www.726637.com | www.706967.com | www.654532.com | www.880840.com | www.949440.com | www.911292.com | www.911160.com | www.814968.com | www.765724.com | www.988312.com | www.908335.com | www.829018.com | www.766058.com | www.795412.com | www.733206.com | www.616646.com | www.827189.com | www.560006.com | www.984601.com | 267825.com | www.984000.cc | www.917879.com | www.876830.com | www.856516.com | www.839907.com | www.768980.com | www.717845.com | www.666149.com | www.565177.com | www.506339.com | www.409942.com | www.645727.com | www.701043.com | www.647500.com | www.893901.com | www.802116.com | www.739837.com | www.654498.com | 024794.com | 462068.com | www.994416.com | www.915009.com | www.399.hk | www.3833.red | www.198.cm | www.yg43.com | www.698652.com | www.8250.loan | 737559.com | 515142.com | 324002.com | 189036.com | 118360.com | www.962496.com | www.884016.com | www.fb57.com | www.hj5.com | 华彩www.71399r.com | 968694.com | 126224.com | 550907.com | 271103.com | 407676.com | 716648.com | www.941353.com | www.789182.com | 397394.com | 796347.com | www.977413.com | www.898731.com | www.771013.com | 180899.com | 5525.us | 678461.com | www.972645.com | www.875160.com | www.333270.com | www.972185.cc | www.862537.com | www.829654.com | www.797836.com | www.822001.com | www.889538.com | www.769098.com | www.698708.com | www.655667.com | www.678932.com | www.693596.com | www.567525.com | www.469037.com | www.345544.com | www.230226.com | www.165067.com | www.196950.com | www.039661.com | www.87373.cc | www.43767.com | www.7002.pw | www.9993.bid | www.2607.net | www.58if.com | www.05wj.com | www.hn68.com | www.05xv.com | www.kj19.com | www.xa69.com | www.gd33.com | www.du45.com | www.bz59.com | 幸运彩票www.037211.com | 114716.com | 986463.com | 957734.com | 952539.com | 27735.com | www.967945.com | www.858064.com | www.853522.com | www.848553.com | www.717842.com | www.422263.com | www.199110.com | www.93751.com | www.1529.win | www.ht40.com | 995064.com | zc87.com | www.881584.com | www.910002.com | www.664380.com | www.388398.com | www.420030.com | www.083761.com | www.13896.cc | www.03rv.com | www.34tm.com | 金冠彩票www.49956z.com | 976142.com | www.921180.com | www.642881.com | www.576726.com | www.461878.com | www.224166.com | www.015588.com | www.5200.biz | www.n86.cn | www.ti17.com | 588941.com | www.406218.com | www.003450.com | 4830.cn | www.333025.com | www.737081.com | www.666998.com | www.674911.com | www.587620.com | www.235222.com | www.128358.com | www.88985.cc | www.15973.com | www.097466.com | www.12007.com | www.1772.cc | www.2738.xyz | www.15bk.com | www.lm54.com | 亿万彩票www.905881.com | 791947.com | 499468.com | www.987829.com | www.866928.com | www.953601.com | www.988828.com | www.861636.com | www.725750.com | www.949440.com | www.800214.com | www.626504.com | www.722969.com | www.604137.com | www.895776.com | www.697088.com | www.652170.com | www.582712.com | www.824115.com | www.776707.com | www.6187.vip | www.98mg.com | www.75fo.com | www.tz04.com | www.wd3.com | 502591.com | 708090.cc | www.vu44.com | www.km99.com | 721157.com | 112062.com | 272143.com | www.857404.com | www.072559.com | 054332.com | www.257529.com | www.f98.cc | www.679079.com | www.0839.cn | www.887997.cc | www.72554.com | 137042.com | www.706845.com | www.3773.cm | www.961621.com | www.88115.cc | 67244.com | www.104122.com | 51eo.com | www.217331.com | 01gs.com | www.717367.com | www.251271.com | www.82994.com | www.80zy.com | 110290.com | 360021.com | www.813311.com | www.543688.com | www.206759.com | www.49244.com | www.7353.cn | www.d12.net | 561072.com | 743431.com | www.839383.com | www.593216.com | www.298399.com | www.088279.com | www.13014.cc | www.n43.me | www.ci28.com | 778645.com | www.963887.com | www.651596.com | www.638155.com | www.398951.com | www.238583.com | www.70666.cc | www.559.cx | www.iv70.com | 780036.com | 781354.com | www.nv30.com | www.vu49.com | www.zu02.com | 796418.com | 417733.com | 947048.com | 55475.com | 150123.cc | www.903306.com | www.756679.com | www.895801.com | www.724832.com | www.737739.com | www.611850.com | www.2018.cn | www.25586.com | www.139303.com | 954378.com | 414248.com | www.972639.com | www.821791.com | 299348.com | www.921180.com | www.771791.com | www.776647.com | www.655033.com | www.mj24.com | www.ja93.com | 500万彩票www.39500x.com | 089025.com | 577280.com | 324360.com | www.964824.com | www.791636.com | www.666354.com | www.543000.com | www.369330.com | www.371715.com | www.567938.com | www.532657.com | www.607836.com | www.620232.com | www.713021.com | www.612967.com | www.589085.com | www.472325.com | www.367836.com | www.413197.com | www.370628.com | www.675111.com | www.589620.com | www.592996.com | 824625.com | www.947249.com | www.745914.com | www.610850.com | www.860433.com | www.871013.com | www.856457.com | www.789184.com | www.631923.com | www.813760.com | www.735393.com | www.621549.com | www.689494.com | www.618199.com | www.691369.com | www.528776.com | www.480116.com | www.315926.com | www.172973.com | www.345644.com | www.641666.com | www.832210.com | www.33xb.com | www.pv25.com | 中彩网www.61233c.com | 彩票大家乐www.21202w.com | 989438.com | 264406.com | www.984585.com | www.823885.com | 379235.com | www.088352.com | www.961187.com | www.839177.com | www.973821.com | www.830798.com | www.813405.com | www.674118.com | www.570359.com | www.426833.com | www.263786.com | www.264406.com | www.177603.com | www.184434.com | www.128617.com | www.91436.com | www.75536.com | www.008687.com | www.04132.com | www.0128.org | www.9918.org | www.92tw.com | www.63qf.com | www.ky17.com | 老彩票www.669634.com | 193354.com | 113844.com | 024740.com | www.199.link | www.88xb.com | www.kf94.com | 彩票58www.582977.com | 9号彩票www.987969.com | 029318.com | 688765.com | 278719.com | www.957064.com | www.841277.com | www.853645.com | www.720303.com | www.992385.com | www.801191.com | www.597816.com | www.476067.com | www.274719.com | www.250881.com | www.067002.com | www.53871.cc | www.30831.com | www.179121.com | www.502386.com | www.650773.com | www.753354.com | www.569390.com | www.442300.cc | www.437178.com | www.354654.cc | www.2