Patent US 4,875,178

A method to control the discharge of wastewater to receiving waters includes using a site specific computer program model to predict the amount of wastewater which can be discharged to the receiving waters. A signal derived from the computer model is used for controlling values, sluice gates, or pumps to thereby control the discharge of the wastewater. The computer program model is provided with a series of equations dealing with physical, chemical and biological data and with site specific data of the receiving stream so that wastewater discharge is carried out on a real time basis.