Umzekelo Hm4e-0009C
Isithintelo sesikhukula esizenzekelayo se-Hydrodynamic siyasebenza ekungeneni nasekuphumeni kweziKhululo, ufakelo oluzinzisiweyo kuphela.
Xa kungekho manzi, izithuthi kunye nabahamba ngeenyawo banokudlula ngaphandle komqobo, bengoyiki ukutyumza isithuthi ngokuphindaphindiweyo; Kwimeko yokubuyela umva kwamanzi, inkqubo yogcino lwamanzi ngomgaqo wokuvuselela amanzi ukuze kuphunyezwe ukuvulwa nokuvala okuzenzekelayo, okunokumelana nesiphango semvula ngesiquphe kunye nemeko yezikhukula, ukufikelela kwiiyure ezingama-24 zolawulo lobukrelekrele.