Xa amanzi amabi ekhaya nezindustrini ayidinga ukuvulwa, ithangka eyodwa iyagqoka indlela enkulu. Bheka ngayo njengoba isibhakabhaka sesilwane kusetyenziswa kwamanzi njengesilungu esikhulu, esibizwa ngokusho esingaphansi apho amanzi emhlophe ayagcina ukuthi aqale. Ngenxa yoko amanzi asisile, izinto ezingaphansi njengomphakathi, umthwalo wokuphakama, nokubiliwe kubiliwe kusuka kumkhiyana. Lezi zinto ezisukile ziyisilungu, futhi kufanele kube lula ukususa kona noma kungasukile. Amazi amhlophe kwaye asihamba ekugcineni kwezinye izinyathelo zokuchitha, abahambisa isilungu. Le ndlela yokuchitha kusiza ukuthi amanzi asikhipha kuma-rivers ne-lakes abe mhlophe kakhulu futhi abe nzima kakhulu kubantu nabantu abazimele. Le ndlela yinkani enkulu kodwa yinkani enkulu kuyinhloko yezwe.