Izici zenqubo:isakhiwo esihambisanayo, esinezicindelo eziyisithupha. Inqubo yokukhiqiza isihlabathi esizilwelayo iyasetshenziswa ekuhlanganiseni okuhambisanayo, ukubeka okuhambisanayo nokuthululwa. Izinto ezithululwayo zithululwa ngenqubo yokuthululwa okuvundlile, futhi amanzi angeniswa emgodini wokungena wezendlalelo eziningi, okuthuthukisa ngempumelelo ukufana kwendawo yobushushu yensimbi encibilikile ebusweni bebhokisi lesembozo. Kwinqubo yokukhiqiza, izinga lokonakala kwezimbobo kanye nezimbobo zesihlabathi ezintweni ezithululwayo liphansi, futhi ikhwalithi izinzile futhi ingalawuleka.