As an AI language model, I am not aware of the specific water management regulations in every country or region. However, generally speaking, the use of proportion in water management regulations can vary depending on the specific goals and priorities of the regulations.
Some regulations may prioritize equitable distribution of water resources among different stakeholders, and may use proportion to allocate water usage rights based on factors such as population size or the size of agricultural land. Other regulations may prioritize preserving the environmental quality and health of aquatic ecosystems, and may use proportion to set limits on the amount of pollutants or nutrients that can be discharged into water bodies.
Furthermore, the use of proportion may also vary depending on the specific method of water management being employed. For example, in water pricing mechanisms, proportion may be used to vary the cost of water usage according to the amount of water used, in order to encourage more efficient use. In water conservation programs, proportion may be used to set targets for reducing water usage by a certain percentage.
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