Kungenzeka ukuthi ngezikhathi ezithile uhambe ngasogwini lolwandle noma eduze kwewa owabona idwala elikhulu phezulu eweni elifanayo noma maphakathi nolwandle. Wake wacabanga ukuthi yafika kanjani lapho?
Ososayensi babecabanga ukuthi ukufuduka kwamatshe anjalo Kwabangelwa amagagasi anamandla ayenzeka ngesikhathi sama-tsunami. Kodwa-ke, kutholakele ukuthi lokhu akunjalo kuphela. Manje yini edingekayo ukuhambisa lezi zinhlobo zamatshe?
Ukuhambisa amadwala angama-600-ton
Ososayensi abakwazanga ukunikeza olunye uhlobo lwencazelo yalokhu amatshe ahambayo afinyelela kumathani ayi-600 ngesisindo ngaphandle kwamandla etsunami. Amagagasi amakhulu ama-tsunami kuphela akwazi ukuhambisa amadwala amakhulu futhi asindayo.
Amagagasi, noma ngabe makhulu kangakanani, angahambisa kuphela izinto ezifika kumathani ayi-200. Ngakho-ke, ososayensi abakwazanga ukuchaza ukuthi kungani ukuba khona kwamatshe amakhulu kangaka ezindaweni ezinjengalezi.
Iqembu labaphenyi abavela UWilliam College eMassachusettsIzwe laseMelika lithole ukuthi ama-tsunami awadingi ukwenzeka ukuhambisa amatshe alolu sayizi.
Ucwaningo luholwa nguRónadh Cox futhi lwashicilelwa kumagazini i-Earth-Science Reviews. Ngokusho kocwaningo, amagagasi amakhulu kakhulu, abizwa ngama-vagabonds, ayakwazi ukuhambisa izinto ezinesisindo esifinyelela kumathani angama-620, okuzochaza ukuthi umthelela wamagagasi amakhulu akhiqizwa ngesikhathi seziphepho ungaba namandla kakhulu futhi ube yingozi kunokuba sicabanga.
Ukuhlaziywa kokuhamba nokuhamba
Ithimba eliholwa uCox belilokhu lihlaziya ukuhamba kochungechunge lwamatshe ogwini olusentshonalanga ye-Ireland ebusika buka-2013 nango-2014. Ukuhlaziya ukunyakaza, izithombe zithathwe ngaphambi nangemva kweziphepho eziningana ezenzeke ngaleyo nkathi. Ngemuva kweziphepho, izithombe ziveze ukuthi elinye lalawo matshe amakhulu athwetshulwe ngamathani ayi-620 esisindo, yayinyakaze amamitha ayi-2,5.
Vele, uma uthi nhlá, amamitha ama-2,5 wokufuduka awakwazi ukuba yingozi. Kodwa-ke, izivunguvungu zenzeka ngendlela engaguquguquki futhi eyenzeka minyaka yonke, ngakho-ke amadwala angagcina esuswe kude kakhulu.
Amamaki abangelwa amagagasi anamandla kwamanye amatshe akhombisa ukuthi amagagasi ayakwazi ukuhambisa izinto ezisinda kakhulu kunalawa matshe. Lokhu akuboniswanga esikhathini sokufunda, kepha kulinganiselwa ukuthi bakholelwa ukuthi kufanelekile.
Ngaphezu kwedwala elihambise amamitha ayi-2,5, abacwaningi bebelokhu befunda iphethini yokuhamba kwezinkulungwane zamanye amadwala amancane. Lolu cwaningo lusinikeza umbono ongaphezulu noma omncane wokuthi amandla amagagasi abangelwa izivunguvungu kulezi zindawo nakwezinye izifunda ezifanayo angaveza kanjani umthelela ezintweni ezisindayo kangangokuba zeqe amathani angama-600.
Zivikele bese uhlela
Kulesi simo, kungcono ukuhlela uhlelo lokuvikela kanye nokuqapha ngokumelene nokuhamba kwezinto ezisindayo ezingalimaza ingqalasizinda noma ugu. Ngenxa yalokhu, ukuhlaziywa kokuhamba kwamadwala kungasebenza njenge ukubikezela ukulinganisa umthelela wamagagasi ogwini kanye nokukwazi ukuhlola ngendlela enembayo umonakalo ongabangelwa.
“Igagasi elingasusa itshe elingamathani angu-600 lingasusa noma yini amathani angama-600. Futhi uma izivunguvungu zikhula, njengoba kungaba njalo uma kubhekwa ukushintsha kwesimo sezulu, amandla alezi zinhlobo zamagagasi okwamanje ahlasela izindawo ezisogwini eziveziwe angafinyelela ezindaweni ezisogwini ezingabathinti namuhla, "kusho uCox.
Ngalesi sizathu, kubalulekile ukwazi amandla amaza ahamba phambili angaba nawo, ngoba, uma ekwazi ukuhambisa izinto ezifika kumathani ayi-600, angenza umonakalo omkhulu ezintweni. Kubalulekile ukwazi lokhu ukuze uhlele kahle ukuvikelwa kwemingcele nezindawo ezisengozini.