释义 |
base level
base leveln. The lowest level to which a land surface can be reduced by the action of running water.base level n (Physical Geography) the lowest level to which a land surface can be eroded by streams, which is, ultimately, sea level base level
base level[′bās ‚lev·əl] (geology) That critical plane of erosion and deposition represented by river level on continents and by wave or current base in the sea. |