On Wetlands and Their Classification:
An Example from the Middle Volga Region

V. G. Papchenkov

Institute of Inland Water Biology, Russian Academy of Sciences, p/o Borok, Nekouzskii raion, Yaroslavl oblast, 152742 Russia

Received August 28, 1998

Abstract—The classification of waterlogged lands in the Middle Volga region is proposed, which includes
basic categories such as variant, type, class, order, and superorder. Variants are local areas of ecosystems with
similar abiotic factors and phytocenoses. Classification at the level of types is based on similarity of hydrologic,
hydrochemical, and soil characteristics of ecosystems. Classes are distinguished by the criteria of artificial ori-
gin of wetlands or their confinement to watersheds, slopes, or floodplains. Orders refer to large classes of the
inland hydrosphere: waterways, water bodies, and bogs. They form the superorder of continental wetlands.

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