(Solved): A shit flow diagram (SFD) is a graphic that is used to understand and communicate how excreta phy ...

A shit flow diagram (SFD) is a graphic that is used to understand and communicate how excreta physically flows through a city or town. SFDs track both wastewater (WW) and faecal sludge (FS). As a result, they can be used to track the environmental and health impact of sanitation in different communities, regardless of whether the said communities use sewer or non-sewer sanitation systems. Figure 1 (below) shows an SFD for a large town in Mpumalanga. Of particular interest, from the figure, are the FS and WW flows from three communities: CA, CB, and CC. Assuming that (i) at the "local level", the bulk of faecal matter from CC is quickly incorporated into the soil and that (ii) the direction in which groundwater and surface water flows is from the locality of CC towards the Mfulamkhulu River, which community is likely to have the most impact on the physical and the microbiological quality of the Mfulamkhulu River? Please explain your choice using no more than five sentences. Do you expect the same community to have the most impact on the chemical quality of the River's water? Explain your answer using no more than three sentences. Note: If you have to make additional assumptions, not that it is necessary to do so, please clearly state those assumptions. [This problem was in the 2021 mid-semester test]