What are the different approaches to measuring per capita water consumption?

Per capita water consumption can be measured using various approaches such as metered consumption, survey-based methods, and remote sensing technologies. Metered consumption involves measuring the volume of water consumed using water meters, while survey-based methods rely on self-reported data from households or other water users. Remote sensing technologies use satellite data to estimate water use in a given area. Each approach has its advantages and limitations and should be selected based on the specific context and data requirements.