Water Stewardship Information Sources
| ID | 5 |
|---|---|
| Citation | Aecom, Associated Engineering Ltd, Kerr Wood Leidal Associates Ltd. 2010. Technical Memorandum No. 2: Evaluation of Water Supply Sources for Greater Vernon Water. Prepared for Regional District of North Okanagan. |
| Organization | RDNO |
| URL | http://www.rdno.ca/docs/TM2_Eval_Water_Source.pdf |
| Abstract/Description or Keywords | Greater Vernon Water (GVW) relies on surface water sources for its raw water supply. The two major sources, Kalamalka / Wood Lake and the Duteau Creek watershed, are subject to limitations such as water licensing, available run-off and storage. Although both are surface water sources, each have very different water resource characteristics as it pertains to the water utility. Water from the Duteau Creek source is collected and drawn from an upland (plateau) watershed and associated lakes which serve as reservoirs. Kalamalka / Wood Lake is a valley-bottom lake and source water includes contributing surface water and groundwater (Clarke Geoscience, 2011) The Duteau Creek watershed contains a group of reservoirs, diversions and control structures originally constructed by the past Vernon Irrigation District. The combined live storage capacity of Aberdeen, Haddo and Grizzly reservoirs is currently 18,340 ML (See TM No. 3 - Source Storage and Supply for further detail). In addition, the Gold-Paradise Diversion supplements flow to the Duteau system from the neighbouring Harris Creek Watershed. The Kalamalka / Wood Lake levels are controlled by an outlet structure which releases flows to Vernon Creek. The Province is responsible for operation of this structure, and typically maintains water levels to satisfy license, fish habitat, recreation and minimum flow levels in Lower Vernon Creek. GVW holds 15 consumptive use water licenses (8,842 ML/yr) on Kalamalka / Wood Lake (see Table 2-1). Other water sources licensed by GVW also include Deer Creek, B.X. Creek and Coldstream Creek. There are also existing groundwater sources for Antwerp Springs and Coldstream Ranch, as well as potential aquifers throughout the region capable of providing localized non-potable water supplies. 1.1 Report Objectives The specific objectives of this report include: x A review and update of the watershed hydrology in the Duteau Watershed to confirm runoff estimates, and long term supply expectations; and x Evaluating other sources to determine yield based on a 50 year drought return frequency. The following specific objectives also form part of this study; however, will be addressed in other memoranda. x Reviewing watershed improvement possibilities that improve yield or water quality. Assess based on existing water quality data and to recommend monitoring programs where data is insufficient; x Analyzing expected future trends in raw water quality and the level of treatment required to meet the anticipated water use under the current and expected future regulatory criteria; and x Prioritizing supply sources using an index based on available quantity, raw water quality, proximity to the user, suitability for potable or agricultural use and cost to develop as a regional supply. Note that water quality issues will be addressed in TM No. 7 - Water Treatment. water supply, hydrology, water yield |
| Information Type | report |
| Regional Watershed | Okanagan |
| Sub-watershed if known | Duteau Creek |
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| Comments | |
| Project status | complete |
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