With the help of stepwise instructions, diagrams, and formulae, the document offers practical advice on how reporting requirements can be met, what equipment is required, and how devices can be installed and maintained to ensure accurate measurements. The Guidance offers recommendations and technical direction on measurement and making estimates for reliable accounting of water withdrawals, discharges and consumption, ultimately to improve the accuracy of water accounting by companies. The recommendations featured cover cement, aggregates, and RMC operations.
The Guidance details three broad categories of water accounting methodologies:
- Measurement methods, including the use of forced and free flow meters
- Calculation by measurement, such as volume measurement and the speed area method
- Calculation by estimation, which touches on calculations derived from the pump and from precipitation for example