Pane rwizi rupi norupi rusingasangani negungwa here?
Kutaura zvazviri, pane akati wandei! Muenzaniso wakakurumbira zvikurusa ungava Rwizi rweOkavango, urwo - panzvimbo pokusvika gungwa - runopinda muOkavango Delta huru ndokupwa, pakati peRenje reKalahari. Mimwe mienzaniso inokosha inosanganisira Onyx River - rwizi rurefu zvikurusa muAntarctica, rwakareba makiromita 32 - runongobva pane rimwe gungwa richienda kune rimwe. Uye rwizi rwaOmo, rwunotangira mumakomo eEthiopia uye runogumira muLake Turkana, Kenya. Asi aya maviri okupedzisira anoyerera mumadhamu. Izvozvo hazvishamisi parwizi, handizvo here? Zvechokwadi kwete; zvisinei, muzviitiko zvizhinji, mvura yorwizi ichasangana negungwa pakupedzisira, sezvo inenge nyanza dzose dzichidyiwa nedzimwe nzizi dzinosvika kugungwa. Hazvina kudaro nokuda kwamakungwa aya. Nei zvakadaro? Nemhaka yokuti dziri mune izvo zvinozivikanwa semadhamu endoreic. Mu hydrology, basin inzvimbo umo mvura yose inonaya ichadonha uye ichiunganidza munzvimbo imwe chete. Kune migero yenzizi isingaverengeki munyika yose, nemakumi akawanda mu (inowirirana) US yoga. Kana ukanyatsotarira pamepu yeUnited States, ungacherechedza kuti haasi madziva ose orwizi aya anopinda mugungwa. Idzi ndidzo dziva dzeendorheic; gadziriro dzakavharika, dzakazvimirira umo uwandu hwemvura hunopinda hwakaenzana nouwandu hunonyangarika kana kuti hunopinda. Nenzira yokurangarira unogona kudziwana mumamiriro okunze api naapi, asi dzinowanzova munharaunda dzakaoma zvikuru - somuenzaniso Kalahari - sezvo uko kunonaya zvikuru kukurwa kwemvura kunowanzogadzira nzira dzokuenda kugungwa. Kazhinji vanewo makomo kana kuti mazaya echando anovharira nzira yavo yokuenda kugungwa. Mvura iri mumakungwa inoumba inenge 18 muzana yenzvimbo yepasi pose - kunyange zvazvo mepu iyi isingaratidzi mvura iri muAntarctica. Cherechedzawo kuti 6 pamakungwa makuru 25 enyika yose ari mumakungwa ane mvura yakawanda - Makungwa eTurkana, Balkhash, Titicaca, Issyk-kul, uye Urmia, uye chokwadi Gungwa reCaspian - nyanza hurusa munyika yose.