Land application of wastewater is an old practice — it was used by the Greeks in Athens and was begun in the United States over 100 years ago. Hundreds of communities throughout the nation currently use one form or another of land application with varying degrees of success. The application of wastewater to the land brings into play elements of climate, air, land, irrigation and water so that understanding and analysis of its many aspects requires a multi-disciplinary approach. There are three generally accepted approaches to land application. These are:
2. Overland Flow
3. Infiltration Percolation
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