METHOD FOR CONTROLLING PUMPING OF POLLUTED GROUND WATER AND SYSTEM FOR CLEANING POLLUTED GROUND WATER

摘要

PROBLEM TO BE SOLVED: To clean ground water efficiently by correcting the amount of ground water to be pumped up by a pump properly corresponding to the variation of the concentration of contaminants in the ground water which changes in association with pumping and the risk of a ground environment.;SOLUTION: A submergible motor pump 3 for pumping up polluted ground water is installed in a pumping well 1, and a flow meter 5 and a concentration sensor 6 are fitted to a pumping pipe 4 extended from the discharge port of the pump 3 to the ground. A water level sensor 7 is installed in a ground water monitoring well 2. A fuzzy controller operates the optimum amount of pumping in consideration of the contribution to ground water cleaning and risk to the ground environment from the change of ground water level ΔH obtained from the amount of pumping Q(t) per unit time measured by the flow meter 5, the change of a pollutant concentration d(t) obtained from a measured value by the concentration sensor 6, and the measured value of a ground water level GWL by the water level sensor 7 with the use of a membership function and a fuzzy inference rule by fuzzy inference and controls a driving device 9 for driving the pump 3.;COPYRIGHT: (C)2002,JPO