Duckweed and watermeal species are classified as floating aquatic plants. Floating aquatic plants are completely free-floating, where no parts of the plant (including roots) are anchored to the pond bottom. Duckweed and watermeal grow in ponds, lakes, canals, lagoons, bayous, and sluggish streams. They are typically found in nutrient-rich waters with little wind or wave action. Often, more than one species of duckweed or watermeal will be associated together in these colonies. (4 pages).
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This 12-page publication explains why artificial drainage is needed on some soils, the types of drainage systems, drainage design considerations, and the steps and economics in installing a relief drainage system.
This 2-page publication explains the steps that people living near streams or lakes should take to minimize their environmental impact and improve water quality.