Ungasisebenzisa njani ngokufanelekileyo iityhubhu zovavanyo lwe-COD zovavanyo lomgangatho wamanzi?
Ukuvavanywa kwemfuno yeoksijini (i-COD) yindlela ebalulekileyo yokuvavanya umgangatho wamanzi kwimithombo eyahlukeneyo yemithombo, kubandakanya imilambo, amachibi, kunye nekamva ...