Look at the pictures below showing the Hartbeespoort dam before (picture A) and after (picture B) the water got polluted. Having seen the water pollution into the Nahoon Estuary Nature Reserve River, reflect and discuss in detail the impact of the high concentrations of E.coli and the water hyacinth plants to both the aquatic life and human beings. Your discussion should include any diagram that also shows your understanding of the impact of dissolved oxygen, BOD, and excess nutrients on the ecosystem.

Transcribed image text