Ngenxa yobuninzi bamanzi amdaka asekhaya kunye namanzi amdaka avela kwimizi-mveliso kwiidolophu nakwiidolophu, ukwakhiwa kwezixhobo zokucocwa kogutyulo lwamanzi amdaka ezidolophini kuye kwaba yindlela yonyango ebalulekileyo. Kwiminyaka engamashumi amabini ukuya kwamathathu edlulileyo, ilizwe lam liye laqonda ngokuthe ngcembe umonakalo omkhulu wokungcoliseka kwendalo kwaye ngokuthe ngcembe liye lanyusa isantya sokwakhiwa kweendawo zokucocwa kwamanzi amdaka ezidolophini. Ukwakhiwa kunye nokusebenza kwenani elikhulu lemizi-mveliso yogutyulo lwelindle kuzise impembelelo enkulu ekucocweni ilindle kunye nokusetyenziswa ngokupheleleyo. Nangona kunjalo, iintlobo zongcoliso kumanzi amdaka ziye zanda kakhulu, nto leyo eyenza kube nzima ukunyanga. Nangona kunjalo, imigangatho yolawulo iya iba ngqongqo, kwaye amaziko amadala okucoca amanzi amdaka awakwazi ngokuthe ngcembe ukuhlangabezana neemfuno zolawulo. Ngoko ke, kungxamisekile kwaye kubalulekile ukwenza ulwakhiwo kunye nokuphuculwa kweendawo zokucocwa kwamanzi amdaka ezidolophini. Ukuza kuthi ga ngoku, iingcali ezininzi zasekhaya nezangaphandle kunye nabaphengululi baye benza uphando oluninzi lwethiyori kunye nelobuchule kulwakhiwo kunye nokuphuculwa kwezixhobo zokucocwa kogutyulo lwasezidolophini.
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