Water: Practice Questions

• a.By increasing the rate of evapotranspiration from the surface to reduce soil saturation.
• b.By increasing the pumping rate to create a cone of depression that attracts more rainwater.
• c.By lining the aquifer with impermeable clay to prevent toxins from leaching into the water table.
• d.By diverting surface water into pits or injection wells to replenish groundwater stores.

• a.It causes the lake to undergo primary succession, turning it into a terrestrial ecosystem within a decade.
• b.It reduces the physical volume of water available in the hydrological cycle through increased evaporation.
• c.It increases the cost of water treatment, making clean water unaffordable despite its physical presence.
• d.It prevents the recharge of local aquifers by sealing the lake bed with organic matter.

• a.The physical volume of water in the river is insufficient to meet the needs of the population.
• b.The country lacks the financial and infrastructural capacity to treat and distribute the available water.
• c.The rate of evaporation from the river exceeds the annual precipitation in the drainage basin.
• d.The river water is too saline for human consumption or agricultural use due to natural mineral deposits.

• a.High DO levels and low organic pollution.
• b.High DO levels and high organic pollution.
• c.Low DO levels and low organic pollution.
• d.Low DO levels and high organic pollution.

• a.It eliminates the need for any industrial water treatment processes.
• b.It increases the total volume of water extracted from local aquifers.
• c.It reduces the demand for freshwater withdrawal by substituting non-potable water for irrigation.
• d.It increases the biochemical oxygen demand (BOD) of the city's primary drinking water source.

Write your answer out first, then check it against the worked solution.