Topic 4.4: Water Pollution Questions

Figure 1 shows the sources of phosphorus delivered to the Gulf of Tamar by the River Kell. Both are made up. Using Figure 1, state the source that has the highest contribution of phosphorus delivered to the Gulf of Tamar.

Figure 1 is a fact file on what happened to the city of Toledo, Ohio, in August 2014.

Figure 1 shows the number of dairy cattle in the Tarwin Valley, a made-up farming region, from 1990 to 2020. Describe how the change in the number of dairy cattle shown in Figure 1 may have affected the water quality of nearby rivers.

Figure 1 shows the number of beef cattle in the Halden Plateau, a made-up farming region, from 1990 to 2020. Describe how the change in the number of beef cattle shown in Figure 1 may have affected the water quality of nearby rivers.

Figure 1 shows pollutants in run-off and wastewater reaching Lake Arno, a made-up lake, from 2019 to 2023. With reference to Figure 1, identify the year in which eutrophication was most likely to have occurred.

Figure 1 shows the share of five environmental impacts caused by towns and cities in Norland, a made-up country.

Figure 1 shows coliform bacteria at six sites on the River Arden, a made-up river, before and one day after a release of untreated sewage. Using Figure 1, estimate the highest concentration of coliform bacteria (in units per 100 mL) one day after the release.

The River Tame flows through Birmingham, England, past old metal works and sewage works. Figure 1 shows the pollutants measured in the river below the city. Outline one advantage of using a biotic index, compared with using the data in Figure 1, for assessing pollution in the river.

Figure 1 shows the sources of phosphorus delivered to Corran Bay by the River Lune. Both are made up. Using Figure 1, state the source that has the highest contribution of phosphorus delivered to Corran Bay.

A sugar factory releases its waste water into a river from a single pipe. Define the term point source pollution.

Figure 1 shows pollutants entering Marlow Bay, a made-up bay, from its rivers between 2012 and 2016. With reference to Figure 1, identify the year in which eutrophication was most likely to have occurred.

In the 1960s, Lake Erie turned green with algae every summer. Define the term eutrophication.

Figure 1 shows the share of five environmental impacts caused by farming in the Velora basin, a made-up river basin.

Give one named example of a persistent organic pollutant (POP).

Figure 1 shows E. coli at six sites on the Vell estuary, a made-up river, before and one day after a release of untreated sewage. Using Figure 1, estimate the highest concentration of E. coli (in units per 100 mL) one day after the release.

Figure 1 shows the sources of phosphorus delivered to Lake Varna by the River Oss. Both are made up. Using Figure 1, state the source that has the highest contribution of phosphorus delivered to Lake Varna.

A factory discharges waste water from one outlet pipe into a river. State the type of pollution source.

Figure 1 shows coliform bacteria at six sites on the Sarno Canal, a made-up river, before and one day after a release of untreated sewage. Using Figure 1, estimate the highest concentration of coliform bacteria (in units per 100 mL) one day after the release.

Figure 1 shows the number of pigs in the Ostrava Lowlands, a made-up farming region, from 1990 to 2020. Describe how the change in the number of pigs shown in Figure 1 may have affected the water quality of nearby rivers.

A town's sewage pipe and the farms around the town both pollute the same river. Outline the difference between point-source and non-point-source water pollution.