Kogin da ke tashi

kogin da ke tashi motsi ne na yawan tururi na ruwa da aka ɗauka a cikin yanayi daga Amazon Basin zuwa wasu sassan Kudancin Amurka, da duniya. Itacen gandun daji suna fitar da tururin ruwa a cikin yanayi ta hanyar gumi kuma ana ajiye wannan danshi a wasu wurare a cikin nau'in hazo, yana samar da kogi mai kama da juna.

 Ra'ayi 
Wani matsakaicin itace na gandun daji zai saki lita 1000 (220 imp gal; 264 US gal) na tururi na ruwa a cikin yanayi kowace rana. An gano cewa yayin da kowane murabba'in mita na farfajiyar teku ke narkewa lita ɗaya na ruwa a kowace rana, wannan yanki na gandun daji yana narkewa kusan sau takwas saboda nau'ikan ganye da yawa a cikin kambin bishiyoyi. Babban iskar iska a cikin kwandon Amazon yana zuwa kudu maso yamma. Lokacin da wannan iska ta kai Andes, tsaunuka suna aiki a matsayin "kulle na halitta", suna sake tura manyan iska mai laushi zuwa yankunan Amazon na Colombia, Ecuador, arewa da kudancin Peru, tsakiya da kudancin Brazil da kuma arewacin Argentina, Paraguay, da Uruguay, kuma ruwan sama yana fadowa a waɗannan yankuna. Wani ɓangare na wannan iska yana sarrafawa don shawo kan cordillera kuma yana ajiye ruwan sama a yammacin Peru. Sauran iska suna tafiya zuwa arewa daga kwarin Amazon, suna wucewa Colombia, Venezuela, Guyana, Guiana na Faransa, da Suriname.    

 Sakamakon yanayi na sare daji 
A shekara ta 2009 Antonio Nobre, masanin kimiyyar yanayi na Brazil, ya bayyana cewa ba tare da kogin da ke tashi ba, yawancin kudancin Brazil, wanda ke samar da kusan kashi 70% na GNP na ƙasar, zai zama hamada. Cire da gandun daji na Amazon don katako da aikin gona na iya haifar da ƙananan amfanin gona a wasu wurare. Hayaki daga gobarar da wasu manoma suka kafa don share ƙasa yana aika barbashi cikin yanayi, wanda ke haifar da raguwar hazo, wanda hakan ya bar bishiyoyi, waɗanda suka samo asali a cikin yanayin rigar, masu saukin wuta. An yi imanin cewa fari a kudancin Brazil a shekarar 2010 ya faru ne saboda bushewar koguna masu tashi, kuma mafi munin fari na 2014-5 an danganta shi da wannan.

 Shirin Kogin Jirgin Sama 
Tare da babban yanki da ruwan sama mai yawa, Brazil tana samun ruwan sama da yawa a cikin shekara guda (an kiyasta a 15,000  kilometers (3,600 cu ) fiye da kowane ƙasa. A cikin shekara ta 2007, matukin jirgi na Switzerland-Brazil Gérard Moss ya haɗu da masana kimiyya don fara aikin don kimanta tushen ruwan sararin samaniya a kan Brazil da kuma bincika yiwuwar cewa fari na baya-bayan nan a kasar yana haifar da lalacewar gandun daji na Amazon. Wannan shi ne Flying Rivers Project. Babban manufar aikin shine "gwagwarmayar tabbatar da asalin tururin ruwa, ruwan sama da ruwan kogi a yankunan da koguna masu tashi suka haye". Sauran manufofi sune kimanta hanyoyin da ke cikin wannan canja wurin ruwa da kuma ilimantar da jama'a wajen fahimtar muhimmancin gandun daji na Amazon a matsayin tushen ruwa wanda ke da mahimmanci ga rayuwarsu da tattalin arziki

 Manazarta