drainage divide


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Related to drainage divide: drainage basin, Water basin

drainage divide

[′drān·ij də‚vīd]
(geology)
The border of a drainage basin.
The boundary separating adjacent drainage basins.
References in periodicals archive ?
It is obvious from the results of the dye-tracing test from well I-3 that the surface drainage divide is meaningless with regards to subsurface water flow, and that pollutants introduced into either watershed can end up in both watersheds.
Results confirm the extent of the mineralized zone as 60 to 80 metres wide and 200 metres long, trending east of north from Kaiya Creek up a steep spur and over a small knoll on the main east-west drainage divide, terminating at a moderately northerly dipping fault cutting obliquely across the knoll.
The problems associated with managing and protecting recharge areas for irrigation water are compounded in regions underlain by carbonate rocks because of the tendency of water to move through subsurface solution openings that cut across surface drainage divides, making identification of the recharge areas extremely difficult.