Kwesinye isikhathi imvelo ingasimangaza ngenani lezinto ezingajwayelekile nezingachazeki ezikhona. Izindawo ezibonakala zithathiwe ezindabeni, izinto ezingeke zichazwe ngisho nayisayensi. EMpumalanga kunjalo ngomfula iSlims, protagonist wento engachazeki nengavamile eye yenzeka emlandweni wethu wakamuva kakhulu.
Kuze kube manje, akukho lutho olubaluleke kangaka olubhalwe phansi. Futhi lo mfula usomile futhi wanyamalala esikhathini esiyizinsuku ezine. Ngabe ufuna ukwazi ukuthi lokhu kwenzeke kanjani futhi kungani?
UMfula iSlims
Lo mfula usenyakatho yeCanada futhi usuneminyaka engamakhulu eminyaka uthwala i-meltwater enyakatho. Amanzi ageleza esuka e-Kaskawulsh Glacier e-Yukon Territory yaseCanada aye eMfuleni i-Kluane abese eqhubekela oLwandle iBering. Nokho, Le ntwasahlobo yangaphambilini ka-2016 kwenzeke isimanga esishintshe yonke into.
Mhlawumbe ngenxa yokufudumala kwembulunga yonke, isikhathi sokuncibilika okukhulu kweqhwa sinyukile, okubangele ukugeleza kwamanzi okugeleza komfula kuguquke kuhambisane nomfula wesibili oqondise kabusha amanzi ngaseGulf of Alaska, etholakala ezinkulungwaneni zamakhilomitha ukusuka endleleni yawo yasekuqaleni. Lolu wushintsho olukhulu ekugelezeni kwamanzi esifundeni, okufana nalokho okwenzeka kwezinye izingxenye zomhlaba, njengase imimoya yaseSpain, nazo ezithintwa yizimo zezulu.
Uma kubhekwa lesi sigameko, kutholakale ukuthi amanzi omfula ehle kakhulu phakathi kukaMeyi 26 no-29, 2016. Ngenxa yalesi simo, bafuna ukwazi ukuthi wonke lawo manzi aphelelephi, base bewahlaziya besebenzisa ama-drones nendiza enophephela emhlane. Kwamangaza umphakathi wezesayensi, Icala lokuthi kunyamalale umfula ngezinsuku ezine nje kube ukubanjwa komfula. Le ndlela ibizwa kanjalo engakaze ibonwe ngaphambili emlandweni.
Ukubanjwa komfula
Lesi simo ngumcimbi we-hydrographic oqukethe ukuguguleka komhlaba okwenziwe ngamanzi omfula omkhulu kangangoba uyakwazi ukuvula igebe esiteshini somunye umfula, ngaleyondlela uthumba amanzi awo futhi uwashiya engahambanga. Into ehlaba umxhwele ngalesi simo ukuthi ubufakazi obungokomlando balolu hlobo lwesimo buphakamisa ukuthi kuthatha izinkulungwane zeminyaka ukuguguleka ngokwanele ukudala le nqubo. Kodwa-ke, kulokhu kwenzeke ngezinsuku ezine kuphela.
Abaphenyi baya eMfuleni iSlims ukuthola ukuthi kungani le nto yenzeke eYukon ngo-Agasti 2016. Isimanga lapho, lapho sifika emfuleni, ovame ukuthwala ukugeleza okungaba ngamamitha angama-480 ububanzi, wawusunyamalele.
Ngokusho kukaJames Best, isazi sokuma komhlaba e-University of Illinois, lokhu okulandelayo kwenzeka:
Saya kule ndawo ngenhloso yokuqhubeka nokukala kwethu kwi-River Slims, kepha sathola ukuthi umbhede womfula usomile kakhulu. Phezulu kogu lolwandle esasikulokhu sihamba ngesikebhe esincane manje kwakuyisiphepho sothuli. Mayelana nokushintshwa komhlaba kwakumangalisa ngendlela emangalisayo.
Lesi sigameko saqeda konke ukugeleza komfula i-Slims, kodwa kwenzeka okuphambene nomfula i-Alsek. Ngokumunca yonke ingcebo kaSlims, ingcebo yakhe yanda kakhulu. Ubudlelwano phakathi kwemifula nezimo zezulu nakho kunendima ebalulekile, njengoba kungabonakala kwenye indawo eCanada, lapho kuye kwabhalwa khona izinguquko eziphawulekayo emaphethini amanzi. Isibonelo salokhu singabonakala ku- imifula yaseSpain, lapho isimo sezulu esibi kakhulu singaba nomthelela ekutholakaleni kwamanzi.
Kungani lokhu kwenzeke?
Ukuze kuchazwe into enkulu kangaka enjengale, kwenziwa izifundo enkundleni futhi zonke zifinyelela esiphethweni esifanayo: ziyathinteka ngokuguquka kwesimo sezulu. Ukukhuphuka kwamazinga okushisa omhlaba kanye nokuhlehla okulandelayo kwezinguzunga zeqhwa kudale isikhathi sokuncibilika okukhulu nokubholwa kwesiteshi esisha eqhweni. Leli qiniso yilo eliqondise ukugeleza kwamanzi kuya ngaseningizimu emfuleni iKaskawulsh.
Lokhu kusho ukuthi esikhundleni sokugcina oLwandle iBering ngeLake Kluane, amanzi ancibilikayo manje asebenzela ohlangothini oluseningizimu-mpumalanga futhi ekugcineni afinyelele olwandle iPacific. Inguquko enkulu, hhayi nje ngoba kungokokuqala ukuthi ukuthunjwa komfula kwenzeke ngokushesha okukhulu, kepha ngoba kunjalo icala lokuqala lapho ososayensi bacabanga ukuthi le nto yenzeke ngenxa yokushintsha kwesimo sezulu okwenziwe ngabantu.
