Places to abstract from
Rivers and lakes
Reservoirs
Aquifers
Rivers and lakes
Considerations
Annual discharge must be adequate
Variation in flow
Water quality
Other uses
Rivers and lakes
Over abstraction causes
Increased concentration of pollutants
Decreased discharge
Ecosystem disturbed
Reservoirs
Considerations
Topography Impermeable geology Large catchment Adequate upstream water supply Reliable rainfall
Reservoirs
Over abstraction causes
Sedimentation
Micro climates
Changes downstream
Habitat change
Aquifers
Considerations
Type of geology
Must be permeable to allow recharge
Aquifers
Over abstraction causes
Subsidence Habitat loss Dry soils Loss of wetland Lowered water table Vegetation change