Water environment capacity refers to the natural ability of a set river section to meet certain water quality requirements to absorb a certain pollutant.
The water environment capacity includes dilution capacity and self-cleaning capacity. The water environment capacity exists objectively, so it has nothing to do with the current discharge, but only with the amount of water and the self-purification capacity.
Water environment capacity is a resource, and it should also be independent of the use function. The use function is artificially set, and the setting of the functional area is related to the allocation of water environment capacity, and has nothing to do with the calculation of water environment capacity.
As the critical control condition for the discharge of pollutants from water bodies, the water environment capacity is the basis for achieving water quality standards. The capacity of water environment has natural and social attributes, involving many aspects such as economy, society, environment, and resources, and all aspects are interrelated and affect each other.
The influencing factors of water environment capacity are divided into internal factors and external factors. Internal factors mainly include hydrological conditions, geographical features, etc., and external factors involve the amount of socio-economic, environmental goals, scientific and technological levels, etc., which makes the internal factors complex and changeable.
Source: Kankan Video