Sustainable Groundwater Management for Municipal Water Supply in the Township of Langley, Canada

Description:The Township of Langley located in the province of British Columbia, Canada lies approximately 45 kilometres east of the City of Vancouver. The northern municipal boundary of the Township is the Fraser River while the southern boundary is the Canada-United States border. The Township is faced with the challenge of competing interests for its groundwater supplies, with requirements for municipal usage, private domestic usage, agricultural, industrial and commercial use, together with a reliance on groundwater to support baseflow for its valuable aquatic habitats. In addition to groundwater extraction, changes in groundwater recharge are occurring through increased development pressures. A comprehensive regional groundwater model has been developed for the Township aquifer system using MODFLOW modelling code based on a rigorous data gathering and review exercise, and the model is being used by the TOL as a groundwater management tool. The model was initially developed in 2003 and has been recently updated to incorporate changes to groundwater extraction, and land development as well as additional hydrogeologic information that have been gathered since the initial model development. The updated model is now being used by the Township to determine the long-term availability of groundwater to support future demand and aquatic needs by evaluating the effects of future municipal extraction and land use development scenarios on water levels in aquifers, and baseflows to aquatic habitats. These results will be incorporated in landuse planning, and to identify groundwater management options that will ensure the viability of groundwater as a sustainable long term water-supply source for the Township.

Authors: Christine Bieber

Subjects:

Tags:2015 BCWWA Annual Conference & Trade Show,AC15,AC15 presentations

Citation:Stream 2: Ensuring Water Quality & Supply

Publication Date:May 28th, 2015 Upload Date:Jun 29th, 2015

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