"Production and management of leachate from municipal landfills were evaluated to identify practical information and useful techniques for design engineers and site operators. Advantages, limitations, and comparative costs were also assessed for various approaches to the problem. The study addressed public health impacts, management options, and additional research needs on the generation, control, and monitoring of landfill eration, control, and monitoring of landfill leachates. Numerous mathematical models have been proposed for estimating leachate generation, and they are usually based on the water balance method. Several fairly successful models are proposed here for simulating the change in leachate strength with increasing landfill age of cumulative leachate volume. A program to monitor the zone of saturation is established to give a prompt indication of groundwater contamination."