Well-point dewatering installs a ring of closely spaced well-points connected to a header pipe, drawing groundwater up by vacuum-assisted self-priming pumps. It excels in sandy and silty soils and for excavations down to about 5–6 m per stage.
Bore-well dewatering sinks larger-diameter bored wells (200–500 mm) around the site, each fitted with a submersible pump. It suits deeper drawdown and higher-permeability ground where large volumes must be removed.
The geology of your site — grain size, permeability and the depth of excavation — decides the winner. Oasis' geotechnical engineers use flow nets to estimate inflow at each depth and recommend the most efficient method.