Groundwater control is perhaps one of the biggest and most prevalent issues that can arise on a construction site.
To deal with this issue, there are a number of dewatering techniques that can be used. Dewatering is the actual removal of water from an earth-bound area. This means it can be encountered on projects ranging from groundwater reserves to removing water from riverbeds, caisson, mine shafts and construction sites.
Methods of dewatering include centrifugation, filtration, separation processes, pumping, draining, or evaporation. These methods are known as wellpoint, deep well, horizontal dewatering and eductor systems.
There are also a number of virtual techniques applied to a dewatering site before any physical work begins such as groundwater computer modeling and understanding the physical laws governing groundwater and soils.
Dewatering is typically performed during the early stages of a construction project, primarily in the development phase, in response to high water tables on the construction site.
A comprehensive assessment of a construction site should always be completed before the commencements of any dewatering methods are put in effect. This assessment should include the potential environmental impacts, management strategies, the scientific modeling of the site, the quality of the water and any hazardous materials that it may contain and consult with surrounding businesses or residents that may be affected by the dewatering process.