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

华夏彩票www.hx1162.com www.854518.com | www.143660.com | 788033.com | www.591157.com | www.805711.com | www.853660.com | www.h24.xyz | www.546097.com | www.895203.com | www.03ll.com | www.444969.com | www.352138.com | www.294666.com | www.6538.org | www.754931.com | www.802707.com | www.xx36.com | www.755751.com | www.112536.com | www.962998.com | 500彩票www.50788r.com | www.603552.com | www.836039.com | 998345.cc | www.607592.com | www.196191.com | www.72010.com | www.353201.com | www.525521.com | www.88183.com | 160278.com | www.099988.cc | www.763.red | www.00887.cc | www.544756.com | www.941632.com | 939646.com | 716372.com | 022839.com | www.898115.cc | 585021.com | www.14ay.com | www.9919.tv | 866298.com | www.91388.com | www.925266.com | www.928830.com | www.420460.com | www.372644.com | www.2618.top | www.180790.com | www.877636.com | www.513782.com | www.301271.com | www.575806.com | 来运彩票www.5688y.cc | www.cm60.com | www.949130.com | www.hc34.cc | www.15333.cc | www.96525.com | www.697875.com | www.641111.com | www.qe28.com | www.181687.com | www.yk45.com | www.50hj.com | www.700090.cc | 22242.cc | www.730036.com | www.073191.com | www.sc79.com | www.71139.cc | 364626.com | 220100.com | www.5473.vip | www.170035.com | www.495656.com | www.935212.com | 796617.com | www.075060.com | www.399055.com | www.627.tv | www.9079.vip | www.826739.com | 036693.com | www.568042.com | www.318136.com | www.176523.com | www.66801.com | 330193.com | www.439443.com | 97sb.com | www.133280.com | 161469.com | www.32kl.com | www.10590.com | www.78qq.com | www.139475.com | www.521416.com | www.960845.com | www.129875.com | www.477605.com | 967484.com | www.93793.com | www.6174.biz | www.925404.com | www.99cj.com | www.195832.com | 大赢家彩票网www.83033h.com | www.9498.cn | www.791134.com | www.175611.com | www.626815.com | 781047.com | www.44qi.com | www.18612.cc | www.32765.cc | www.262937.cc | www.873619.com | www.154300.com | www.41401.com | www.ob97.com | www.0327.com | www.87sl.com | www.610229.com | www.596.live | www.53576.cc | www.559757.com | www.819843.com | 864277.com | www.56ox.com | www.33hz.cc | www.01ve.com | www.22mb.com | www.380908.com | www.980057.com | www.2555.date | www.368268.com | www.8806.cc | www.bq27.com | www.5321.xyz | 970354.com | www.161086.com | www.606384.com | www.836519.com | www.ds58.com | www.82797.com | www.114229.com | www.175155.com | www.s35.cc | www.72575.com | www.400813.com | www.916149.com | www.940227.com | 356530.com | www.52561.cc | www.638976.com | www.965.cn | www.823363.com | www.905533.com | www.0323.org | www.242787.com | www.311901.com | www.xs28.com | www.37070.cc | 995134.com | www.905989.com | 283433.com | www.494.mobi | www.286267.com | www.394818.com | www.296725.com | www.884733.com | 267934.com | www.876643.com | 57712.com--www.57712.com | www.25xq.com | www.841860.com | 大赢家彩票www.548611.com | www.185127.com | 280.cc | www.43311.cc | www.078926.com | www.371625.com | www.375863.com | www.219884.com | www.971659.com | 791794.com | www.015.cm | www.61663.cc | www.079789.com | 945924.com | www.462133.com | www.cp8688.com | 顶级娱乐www.284488.com | www.ol21.com | www.gw09.com | www.27qy.com | www.7715.com | www.509353.com | www.888589.cc | www.2425.cc | www.746039.com | www.913593.com | www.831627.com | www.791082.com | 237014.com | www.904226.com | www.699370.com | www.001141.com | www.74ws.com | www.6842.com | www.740060.com | www.0911.pro | www.379655.com | www.71ve.com | www.589198.com | www.ma45.com | www.7dq.com | www.089127.com | www.729787.com | www.32982.com | www.639844.com | www.7js.cc | 大赢家彩票平台www.629913.com | www.62655.cc | 111scweb.com | 438741.com | www.os89.com | www.00840.com | 589151.com | www.061826.com | www.332962.com | 397749.com | www.qp22.com | www.560239.com | www.388245.cc | www.yh84.com | www.44yd.com | www.32924.com | www.611573.com | www.993331.cc | www.53523.com | www.924012.com | www.np06.com | www.2096.in | www.65md.com | www.917744.com | www.710207.com | 463162.com | www.858161.com | www.9569.shop | www.84584.cc | www.88935.com | www.303202.com | www.289077.com | www.723108.com | www.e23.me | www.947563.com | www.319.website | 590825.com | www.yt1.cc | www.201173.com | www.ba33.com | 网易彩票www.092wy.com | www.967208.com | www.209727.com | www.816645.com | www.86fx.com | www.89332.com | www.592653.com | 乐点彩票www.992358.com | www.387124.com | www.983380.com | www.659435.com | www.qg32.com | 841918.com | www.444805.com | www.5180.top | www.gp09.com | www.9039.vip | www.536884.com | 老彩民www.616888.com | www.1573.net | www.113397.com | www.152299.com | www.537529.com | www.921467.com | www.344238.com | www.a24.com | www.39dj.cc | 350944.com | 395322.com | 711081.com | www.73058.com | www.036816.com | www.300644.com | www.742011.com | www.746974.com | 942374.com | www.592755.com | www.783463.com | www.549305.com | www.090234.com | www.7939.biz | www.2540.net | www.nk.cc | www.8140.com | www.489194.com | 654914.com | www.e46.net | www.025834.com | www.2319.me | www.960408.com | www.954013.com | www.9wg.com | www.113454.com | 816572.com | www.335934.com | www.005650.com | www.958609.com | www.753267.com | 99089.cc | www.6816.com | www.82hm.com | 8号彩票www.60108y.com | www.8686.site | www.00005.com | www.065527.com | www.818220.com | www.028224.com | www.931375.com | www.849450.com | www.qh60.com | www.56bo.cc | www.106728.com | www.33646.cc | 365747.com | www.55274.com | www.625268.com | www.3068.vip | www.131980.com | www.594156.com | 131474.com | www.217900.com | www.76732.cc | 赢彩网www.230635.com | www.526573.com | 7276.com | www.997242.com | www.666519.com | www.19ot.com | www.97793.com | www.052222.com | www.209559.com | 653504.com | www.561459.com | 950187.com | www.9885.biz | www.987134.com | 54pk.com | www.239338.com | www.904000.com | www.590466.com | www.421680.com | www.538562.com | 807765.com | www.088945.com | www.398051.com | www.op40.com | www.29gv.com | www.130515.com | 509890.com | 253759.com | www.521185.com | www.893879.com | www.620610.com | www.283683.com | www.750441.com | 222.gg | www.rf34.com | www.33jr.com | www.mv01.com | www.5210.cm | www.96183.cc | www.ne96.com | www.257805.com | www.598380.com | www.171996.com | www.352607.com | www.309035.com | www.219795.com | www.027985.com | www.267333.com | www.121140.com | www.163486.com | www.30kl.com | www.59352.cc | www.729785.com | www.38cr.com | www.17zc.com | www.5893.biz | www.359469.com | www.717555.com | www.06434.com | www.66731.com | www.331340.com | www.67is.com | www.176377.com | 051905.com | 370227.com | www.cu33.com | 8081.cc | www.931549.com | www.720759.com | 爱购彩www.23636g.com | www.189826.com | www.889981.com | 751492.com | www.975051.com | 凤凰彩票www.88266i.com | 166740.com | www.7743.vip | www.tn59.com | www.887018.com | 024781.com | www.316137.com | www.958431.com | www.953464.com | www.6946.pw | 惠民彩票www.hm8222.com | www.218960.com | www.621163.com | www.69775.cc | www.811928.com | 065253.com | www.515.in | www.122206.com | www.854618.com | 824928.com | www.058575.com | www.097563.com | www.z86.club | www.90011.cc | www.8868.tv | www.9782.biz | 307362.com | www.pk25.com | www.02557.com | www.14gc.com | www.90101.cc | www.38335.cc | www.654792.com | www.0880.top | www.si28.com | www.028381.com | www.078929.com | www.113877.com | www.852396.com | 381924.com | www.82gc.com | www.730377.com | www.807861.com | www.29192.cc | www.008309.com | www.074.cm | www.968.net | www.274350.com | www.138707.com | www.687001.com | www.246905.com | www.885117.com | www.911650.com | www.775110.com | www.882377.com | www.ix96.com | www.131551.com | www.402298.com | 975304.com | 892568.com | www.027062.com | www.32ti.com | www.96lr.com | www.6675.cc | www.231896.com | www.252220.com | www.898856.com | www.868571.com | www.8850.vip | www.44208.com | www.116059.com | 659849.com | www.cai186.com | www.693775.com | www.12313.com | www.868346.com | www.774474.com | www.526303.com | www.440422.com | 502651.com | www.426234.com | 49882.com--444409.com | www.006590.com | www.892480.com | io25.com | 161772.com | www.072424.com | www.93479.com | www.96167.com | www.na25.com | www.123884.com | www.20jl.com | www.0764.xyz | www.069527.com | www.4972.cn | www.95ve.com | www.021550.com | www.10808.cc | www.973576.com | 984825.com | www.em78.com | www.9862.org | www.83893.cc | www.69389.com | 971436.com | www.699211.com | www.47461.com | www.192200.com | www.005699.com | www.700824.com | www.13oa.com | www.07862.com | www.153.live | www.678319.com | www.436465.com | www.321091.com | www.971388.com | 502505.com | 261810.com | 494268.com | 884790.com | www.124033.com | www.030787.com | www.440146.com | www.479118.com | www.466399.com | www.xf00.cc | www.061598.com | www.1509.pw | www.31gw.com | www.64031.com | www.117332.com | www.914951.com | www.933557.com | www.967564.com | www.243589.com | www.169901.com | www.227751.com | www.75593.com | www.083911.com | www.540133.com | www.cp8694.com | www.22ix.com | www.796673.com | www.731630.com | www.947303.com | 089440.com | 945228.com | www.338524.com | 036728.com | www.8713.xyz | www.386195.com | www.687700.com | www.866237.com | www.is35.com | www.703.cm | www.5829.wang | www.83ct.com | www.7lg.com | www.dm27.com | www.83zv.com | www.332303.com | 543291.com | www.153513.com | www.32114.com | www.356058.com | 404464.com | www.160277.com | www.990458.com | www.725028.com | 143164.com | www.413171.com | www.58519.com | 众乐彩票www.389544.com | 413793.com | www.926651.com | 597151.com | 397475.com | www.864663.com | 100133.com | uz08.com | www.27qf.com | www.wt69.com | www.622199.com | www.633698.com | www.01804.com | 350260.com | 291082.com | www.991241.com | www.785543.com | www.rl84.com | www.qg60.com | www.91tb.com | www.148178.com | www.499402.com | www.438755.com | www.89nh.com | www.pn78.com | www.2222.org | www.47ak.com | www.498751.com | www.373783.com | www.874711.com | 101632.com | www.420077.com | 974603.com | 2081.com | www.726773.com | www.302834.com | www.963056.com | www.586499.com | www.356370.com | www.796682.com | 开心彩票www.126730.com | www.kf22.com | www.6848.net | www.3309.org | www.48hn.com | www.54gn.com | www.vq18.com | www.cs58.cc | www.18925.cc | www.496675.com | 572365.com | 371916.com | www.12997.cc | www.471149.com | www.689600.com | 彩神网www.csw288.com | www.8ra.com | www.639510.com | 182394.com | 453896.com | 719673.com | www.74jw.com | www.5329.cm | www.5190.vip | www.464908.com | 52654.cc | www.958447.com | www.975786.com | www.885451.com | du71.com | 新盈彩www.xinyc8.com | 鑫亿彩www.087069.com | www.230166.com | www.812900.com | www.808569.com | 05240.cc | www.909187.com | www.kj84.com | www.492400.com | www.fy54.com | www.695768.com | www.968408.com | www.774418.com | www.575533.com | www.097213.com | 254382.com | 448519.com | rayli.com.cn | www.967410.com | 万达彩票www.717671.com | www.900034.com | www.061086.com | 544972.com | 64222.com | www.9444740.com | 134592.com | 992104.com | www.t09.net | www.241698.com | www.551987.com | www.38981.cc | www.076506.com | www.984735.com | 054412.com | www.896505.com | 盈彩票www.355225.com | www.58761.cc | www.561307.com | www.839383.com | www.42bd.com | www.lu04.com | www.706880.com | www.082798.com | www.698317.com | www.817.red | www.3109.net | www.3303.vip | www.509592.com | www.594179.com | 亚洲彩www.68568q.com | cp151.com | www.0pg.com | 254386.com | 乐点彩票www.910336.com | 850919.com | 976242.com | www.711946.com | www.845821.com | 087873.com | www.20yj.com | www.421955.com | 中彩网www.91233s.com | www.6tm.cc | 彩天下www.196049.com | www.708218.com | www.683153.com | www.534853.com | www.158383.com | 086289.com | www.11uo.com | www.am80.com | www.591261.com | 951647.com | www.971787.com | 220436.com | 940989.com | www.883602.com | www.556023.com | www.74ix.com | www.782963.com | www.17417.com | www.097799.cc | www.015198.com | www.245767.com | www.113266.com | www.63335.com | www.86744.com | www.866287.com | www.qs19.com | www.pb9.com | www.88599.com | www.505642.com | www.612600.com | 127073.com | 937831.com | www.991589.com | www.929001.com | www.957465.com | www.689502.com | www.606051.com | 274422.com | 509546.com | www.89193.com | www.061850.com | www.445959.com | www.203083.com | www.337636.com | www.768707.com | www.333517.com | www.248596.com | www.308024.com | www.ef8.cc | www.551866.com | www.84wx.cc | 0830.loan | www.254341.com | www.36983.com | www.630974.com | 240270.com | 588714.com | 492835.com | www.9080.net | www.509923.com | 797823.com | www.51049.com | www.1733.vip | www.915673.com | www.784966.com | www.26303.cc | www.4193.xyz | www.732445.com | www.462207.com | www.373453.com | www.99244.com | www.272267.com | www.674342.com | www.602001.com | 950271.com | 凤凰彩票www.77801r.com | www.259604.cc | www.634745.com | www.566763.com | www.623061.com | www.ez09.com | www.um30.com | www.6396.in | www.53em.com | www.32xp.com | www.648798.com | www.385538.com | www.120025.com | www.058698.com | www.47011.com | www.296454.com | 05611.com | 657687.com | 626413.com | 804935.com | www.0238.cc | www.17we.com | www.519981.com | www.998485.com | www.924666.com | 乐彩网www.lcw997.com | www.5468.vip | www.598362.com | 彩之家www.14czj.com | www.7247.top | www.117508.com | www.547196.com | www.713552.com | www.1439.xyz | www.65567.cc | www.9034.loan | www.zg04.com | 138lh.com | www.836407.com | www.281612.com | www.132545.com | www.40945.com | www.779762.com | www.600284.com | www.689100.com | www.wz47.cc | www.4737.org | www.143007.com | www.645256.com | www.854671.com | 886716.com | www.139841.com | 716389.com | 发彩www.50732c.com | 全民乐彩票www.2934o.com | www.644510.com | 769921.com | 天玺彩票www.208780.com | www.552664.com | www.554504.com | 中国福利彩票www.34788e.com | 180062.com | 039997.com | www.383733.com | www.bp50.com | www.104748.com | www.254682.com | sy59.com | 中彩网www.2408b.cc | 515362.com | www.321999.cc | www.i13.com | www.08kv.com | www.968495.com | www.362220.com | www.958850.com | 072335.com | www.761044.com | www.1177.vip | www.441385.com | www.346056.com | www.279695.com | www.727155.com | www.512602.com | 078975.com | www.96cb.com | www.964644.com | www.711250.com | www.030935.com | www.345735.com | www.3234.com | www.xv3.com | www.33446.com | www.8111.website | 914500.com | www.963141.com | www.541737.com | www.906252.com | www.19711.cc | www.ff06.com | www.106732.com | www.24788.com | www.68117.cc | www.101457.com | www.788748.com | www.nw40.com | www.ux74.com | yz09.cc | www.878572.com | 970401.com | www.pl48.com | www.02455.cc | www.454781.com | www.337753.com | www.350428.com | www.dh76.com | www.680912.com | 彩神网www.csw288.com | www.3680.cm | www.6410.com | 九五至尊www.997666.com | www.51806.com | www.109293.com | www.3930.xyz | www.555660.com | www.fs49.com | www.1354.vip | 065985.com | www.vm68.com | 795989.com | 790530.com | www.863146.com | www.977887.com | www.770900.com | www.612289.com | www.2026.tv | www.7724.cn | za19.com |