Graduate Thesis Or Dissertation
 

Taming the Tumalo : A Damned Dam Repurposed for Recharge

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/2b88qf620

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  • The Tumalo Project at Tumalo Reservoir in Central Oregon was proclaimed a failure almost as soon as it was completed. As the reservoir filled with water diverted from Tumalo creek in the spring of 1915, sinkholes developed in the reservoir floor and every last drop of captured water disappeared into the ground. Research efforts thus far have been focused on the social and political history of the Tumalo Project, but the path of groundwater leaving the reservoir floor has never been confidently assessed. The path of this underground water, along with the geology and history of Tumalo Reservoir, present unique circumstances to explore its potential as a groundwater recharge site. The hydrogeology of the Deschutes Basin as a whole has been extensively studied (e.g. O'Connor, Gannett, Lite), however, I propose that these works were done at a scale that overlooks the refined detail of flow in the Tumalo Reservoir area, the specifics of which make it particularly suitable for a groundwater recharge site. The need for long term water security, coupled with a history of proactive water management planning in the basin, create an exciting opportunity to enhance understanding of the role of groundwater resources in the Upper Deschutes Basin and the extent to which their sustainable use is possible. This preliminary feasibility study for groundwater recharge at the Tumalo site demonstrates the likely flow path of groundwater near the reservoir area based on historical reports and local well log data. A hydrogeologic assessment is used to determine the most appropriate approach for development of the site: aquifer storage and recovery using surface ponding and infiltration, aquifer storage and recovery using injection wells, or managed aquifer recharge.
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Urheberrechts-Erklärung
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