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Hydrological Networks and Data
An Outline of British Hydrology
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abstractions Advisory Water Committee aquifer areas average barrage baseflow boreholes Britain British catchment cegb cent Central Advisory Water century chalk Clywedog reservoir consumption cusecs deficiency dependent desalination discharge domestic downstream drainage basin drought dry weather flow effluent England and Wales estimated estuary evaporation evapotranspiration existing factors flood gauge Grafham Water groundwater hydrograph hydrological cycle important increase irrigation lysimeters mean annual measurement ment Meteorological Office metered method natural occur organisation overall peak Penman Pennines percolation period pollution precipitation problem rainfall raingauge recharge records regional reservoirs result River Authorities River Boards river regulation river Tees river Trent riverflow runoff schemes Scotland seasonal shown in figure sources south-east England sq miles stations storage stream streamflow summer surface runoff Thames tion Trent upland utilisation variations water balance Water Board water quality Water Resources Board water supply water undertakings water-table whilst winter yield