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Title: Artificial recharge to groundwater in the Otter valley
Author: P. Johnston
Document Type: Monograph
Annotation: EA additional title info: environmental protection report
Artificial recharge is the name given to the process by which natural recharge to an aquifer is augmented. (Natural recharge occurs by percolation of effective rainfall and from river flows where appropriate hydraulic conditions exist). A variety of artificial recharge methods have been developed. These include spreading of water (eg. via lagoons), recharging through pits and boreholes, and pumping to induce recharge from surface water bodies. The methods most commonly used involve water spreading. Such projects can be designed to serve a number of purposes: a) to maintain or augment the natural ground water resources for subsequent abstraction for public supply; b) to provide subsurface storage for local or inported surface waters; c) to combat progressive lowering of ground water levels or saline water intrusion, and/or mitigate impacts of abstractions on river flows; d) to provide a subsurface distribution system for established boreholes; e) to provide treatment and storage for reclaimed effluent for subsequent reuse; f) to provide a means of mitigating against reductions in natural recharge as a result of climatic change or urban development. The purposes described in a), b) and c) are likely to be the most relevant in the Otter Valley. Item c) is already an issue which has relevance to the consideration of any company schemes to take-up the full Licensed quantities from their Otter Valley boreholes.
Publisher: National Rivers Authority
Publication Date: 1992
Publication Place: Exeter
Subject Keywords: AquifersGroundwaterWater quality
Geographic Keywords: Otter (river, Devon)DevonEast Devon catchment
Extent: n.p. [4]
Total file downloads: 291

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