Water Resources & Conservation Flashcards

Which metric is used to express the carbon footprint of water treatment and distribution in lifecycle assessments?

Answer: kg CO2e per cubic meter

Carbon footprints of water services are expressed in kg CO2e per cubic meter to standardize comparisons across systems.

What is 'water stress' in the context of carbon auditing and environmental accounting?

Answer: A region's ratio of water withdrawal to available freshwater supply

Water stress is defined as the ratio of total freshwater withdrawals to available renewable freshwater resources in a given area.

Which type of irrigation method offers the greatest water use efficiency and lowest associated carbon footprint from pumping energy?

Answer: Drip irrigation

Drip irrigation delivers water directly to root zones, minimizing evaporation and reducing pumping energy needs compared to other methods.

In water footprint accounting, what does the 'grey water footprint' represent?

Answer: Volume of freshwater needed to dilute pollutants to acceptable standards

The grey water footprint quantifies the volume of freshwater required to dilute pollutants to meet water quality standards.

How does desalination contribute to carbon emissions in water supply systems?

Answer: It requires large amounts of thermal or electrical energy to remove salt

Desalination processes such as reverse osmosis and thermal distillation are highly energy-intensive, leading to significant indirect carbon emissions.

Which ISO standard provides the framework for water footprint assessment most relevant to CAP auditing?

Answer: ISO 14046

ISO 14046 specifically addresses water footprint assessment, providing principles, requirements, and guidelines.

What is 'virtual water' in international trade analysis?

Answer: Water embedded in goods and services during their production

Virtual water (also called embedded water) refers to the total volume of freshwater used to produce a commodity throughout its supply chain.