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Report: Mapping the Likelihood of Flowing Artesian Conditions in the Okanagan Basin and Fraser Valley, British Columbia
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| Digital Map Files
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- Fraser_Valley_MCA_map
Google Earth kmz file for the Fraser Valley Unconsolidated MCA map.
(kmz/31.3 Kb)
- Okanagan_BR_MCA_map
Google Earth kmz file for the Okanagan Valley Bedrock MCA map.
(kmz/845.9 Kb)
- Okanagan_UNC_MCA_map
Google Earth kmz file for the Okanagan Valley Unconsolidated MCA map.
(kmz/71.8 Kb)
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All Documents
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| Contact
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If you have any questions on the information presented, or require additional report data or attachments, please contact the
Ministry.
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An assessment of the areas and factors that affect the likelihood of encountering flowing artesian wells in the Okanagan Basin and Fraser Valley.
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Author: Brynje Johnson, Diana M. Allen, and Mike Wei
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Date Published: Mar 2022
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Report ID: 59470
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Audience: Government and Public
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The purpose of this study was to determine the likely areas and extent of flowing artesian conditions in the Okanagan Basin and Fraser Valley and to identify factors influencing the occurrence of flowing artesian conditions. Occurrence mapping of known flowing wells show flowing wells can occur wherever non-flowing wells. In the Okanagan valley, flowing wells are more heavily clustered in the central and northern Okanagan Basin, and are associated with confined, unconsolidated aquifers. They are generally more concentrated within the Okanagan valley although there are occurrences of flowing wells at higher elevations. Flowing wells occur sporadically throughout the Fraser Valley, but the majority are clustered in the low-lying areas within the Township of Langley and Surrey. A majority occur in Aquifer 58, the Nicomekl-Serpentine aquifer (confined, unconsolidated aquifer), although some also occur outside of the Aquifer 58 boundary. Multi-criteria analysis (MCA) was used to evaluate factors relating to the occurrence of flowing wells. The analysis was carried out in a Geographic Information System (GIS) by employing raster tools in combination with statistics. The results of the MCA were used to map the likelihood of flowing artesian conditions in three hydrogeological contexts: Okanagan bedrock, Okanagan unconsolidated and Fraser Valley unconsolidated. Three MCA maps were produced that show where flowing artesian conditions are "more likely than not" to occur. Site-specific case studies of flowing artesian conditions in Naramata (bedrock context), South Vernon, Armstrong, and Aquifers 58 and 33 in Langley indicate the MCA maps accurately determine the extent of areas where flowing artesian conditions are "more likely than not" to occur at local scales. Recommendations for well-drilling advisories are provided for several areas of the study area.
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Report Type
Subject
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Region - Lower Mainland |
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Region - Okanagan |
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Water Information - Groundwater |
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Water Information - Water Management |
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