TIIMS Glossary
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BE/BA Biological Evaluation / Biological Assessment
Benthic Refers to the bottom of a body of water
Best Management Practices (BMP) Methods or measures that have been determined to be the most effective and practical means to reduce or eliminate the discharge of pollutants, typically from nonpoint sources and storm water runoff. These methods or measures area applied during soil disturbing activities and are intended to prevent or minimize soil erosion and protect water quality. Prescribed measures range from the very simple, such as not operating heavy equipment when soils are wet, to the very complex, such as installing specifically engineered structures to collect water and separate soil, grease, and heavy metals. BMPs may also be temporary, intended to last during short periods of disturbance, or permanent, used to prevent water quality degradation over many years.
Bilge water Water that has collected in the lowest part of a boat. It often becomes contaminated with engine oils and other petroleum by-products from boat engines
Biodiversity

Biodiversity is the variation of life forms within a given ecosystem, biome or for the entire Earth. Biodiversity is often used as a measure of the health of biological systems.
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