This manual establishes the standardized technical criteria and field methodologies required to identify and delineate jurisdictional wetlands under federal regulatory authority. Authored by Ralph Tiner, a recognized expert in wetland science, the text provides a rigorous framework for applying the three-parameter approach: hydrophytic vegetation, hydric soils, and wetland hydrology. It serves as the primary technical reference for federal agencies, environmental consultants, and land managers tasked with determining the extent of protected aquatic resources.

Experts and environmental professionals recognize this manual as a foundational document for regulatory compliance and field assessment. Readers frequently note the technical density of the prose, which is designed for practitioners rather than a general audience.