base level
the level below which a land surface cannot be eroded by running water, e.g. a lake; the mouth of a river; the ultimate base level being the sea

Dictionary of ichthyology. 2009.

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  • base-level — baseˈ level noun (geography) The level to which land can be or is eroded by water • • • Main Entry: ↑base …   Useful english dictionary

  • base level — n. Geol. the lowest level to which land can be eroded, esp. by a river; sea level …   English World dictionary

  • Base level — The base level of a river or stream is the lowest point to which it can flow, often referred to as the mouth of the river. For large rivers, sea level is usually the base level, but a large river or lake is likewise the base level for tributary… …   Wikipedia

  • base level —    The theoretical limit or lowest level toward which erosion of the Earth s surface constantly progresses but seldom, if ever, reaches; especially the level below which a stream cannot erode its bed. The general or ultimate base level for the… …   Glossary of landform and geologic terms

  • base level — Geol. the lowest level to which running water can erode the land. [1870 75] * * * base level, the theoretical limit to which a stream tends to erode its valley, as the level of the sea or of a lake …   Useful english dictionary

  • base level —   the lowest elevation to which erosion can take place. Usually sea level but could be lower if a river drains into an inland sea or lake whose level is below sea level …   Geography glossary

  • base level — Geol. the lowest level to which running water can erode the land. [1870 75] * * * …   Universalium

  • base level —    Lowest level of erosion by a stream [16] …   Lexicon of Cave and Karst Terminology

  • base level — /ˈbeɪs lɛvəl/ (say bays levuhl) noun the lowest level to which running water can theoretically erode the land …   Australian English dictionary

  • base level of erosion — erozijos bazė statusas T sritis ekologija ir aplinkotyra apibrėžtis Paviršiaus lygis, kurį pasiekusi upė arba griova nebegilina savo vagos. atitikmenys: angl. base level of erosion; erosion base level vok. Erosionsbasis, f rus. базис эрозии, m …   Ekologijos terminų aiškinamasis žodynas

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