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Keywords:
RAINFALL,
RUNOFF,
CATCHMENTS,
DRAINAGE,
LAND,
DETERIORATION,
DROUGHT,
YIELD,
METEOROLOGY,
DAMS,
WATER,
WATER SUPPLY,
QUALITY,
EVAPORATION,
DATA,
ALWEN,
BRENIG,
WALES,
UK
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© Thomas Telford and ICE
1958
