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Hydrologic Implications of Seasonally Draining Lakes in the Oregon Cascades: Sensor and Planet Data 2026
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| Type: | Resource | |
| Storage: | The size of this resource is 3.3 MB | |
| Created: | Jun 11, 2026 at 11:25 p.m. (UTC) | |
| Last updated: | Jun 11, 2026 at 11:40 p.m. (UTC) | |
| Citation: | See how to cite this resource | |
| Content types: | CSV Content |
| Sharing Status: | Public |
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Abstract
The hydrogeology of volcanic terrain exhibits characteristics that reflect both a legacy of volcanic construction and transient evolution of bedrock hydraulic conductivity over geologic time. Here, we seek to elucidate hydrogeologic structure in a Holocene-active region of the Central Oregon Cascade Range by measuring the drainage behavior of several lakes partially dammed by lava flows within the watershed of Clear Lake (the highest elevation permanent source of the McKenzie River). We measure the drainage of two seasonal lakes with in-situ sensors and satellite remote sensing, and compare this with the larger scale summer recession of the McKenzie River at the outlet of perennial Clear Lake. Clear Lake recession can be explained via drainage through two parallel linear reservoirs, which we interpret to reflect mixing of waters derived from old and young end-members of the Cascade Critical Zone state shift. Synthesizing our results with previous work we infer watershed scale transmissivity that varies with spatial scale of the aquifer. The filling and draining of the seasonal lakes depends on volume of snowmelt and the permeability of their porous lava dams. We also find, using remote sensing-derived timeseries, that all three systems, but particularly the draining lakes, have responded to declining snowpack since 1990. These results suggest that seasonal variations in surface water storage encode the structure of volcanic aquifers, and can be used to infer groundwater dynamics in the Cascade Range.
This resource represents our most recent Hobo pressure-temperature data and Planet remote sensing data for Lost and Fish Lakes, as well as air pressure data from the Carmen Diversion Dam (operated by EWEB).
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| Name | Organization | Address | Phone | Author Identifiers |
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| Eugene Water and Electric Board |
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This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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