Roaring Spring


Roaring Spring emerges from old lava flows high in the headwaters of the McKenzie River. Cold (4C), clear and abundant, this spring's flow is equal to 1% of the water in the Willamette River at Portland Harbor.

Summer 2015 Survey Crew on Boulder Creek, Upper McKenzie River

The 2015 drought represents a unique opportunity to test fundamental hypotheses for how mountain streams respond to anticipated and dramatic changes in amount and timing of recharge. Survey Crew; Laura Hempel, Cara Walter, Sarah Lewis & Austin Hall at Boulder Creek, Upper McKenzie River, Oregon.

Structure for motion (SfM) survey of Jack Creek

Student Laura Hempel surveys Jack Creek in the Deschutes National Forest with a digital camera and painter's pole. The photos will be processed using a digital photogrammetry technique called "Structure from Motion," that creates a 3D model using photos taken from different angles.

Measuring hyporheic flow in the Clackamas River

The Influence of Hyporheic Flow on River Temperature: River water emerging from naturally occurring gravel bars on a hot summer day may be as much as 2°C cooler than mainstem flow. We explored the potential thermal benefits of hyporheic exchange from proposed gravel augmentation on the Clackamas River, Oregon.

The October 2007 breaching of a temporary cofferdam constructed during removal of the 15-meter (m)-tall Marmot Dam on the Sandy River, Oregon, triggered a rapid sequence of fluvial responses as ~730,000 cubic meters (m3) of sand and gravel filling the former reservoir became available to a high-gradient river.


Will creating artificial (beaver) dams in incised channels in central Oregon help raise the water table and restore meadow grasses for grazing?

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Recent Publications


S.L. Brantley; W.H. McDowell; W.E. Dietrich; T.S. White; P. Kumar; S. Anderson; J. Chorover; K.A. Lohse; R.C. Bales; D. Richter; G.E. Grant; J. Gaillardet , Submitted , Designing a network of critical zone observatories to explore the living skin of the terrestrial Earth

In Press

M.M. Foley; J.R. Bellmore; J.E. O'Connor; J.J. Duda; A.E. East; G.E. Grant; etal , In Press , Dam Removal - Listening In
N.I. Deligne; D. Mckay; R.M. Conrey; G.E. Grant; E.R. Johnson; J.E. O'Connor; K. Sweeney , In Press , Mafic volcanism of the central Oregon Cascades: a volcanic, tectonic, hydrologic, and geomorphic journey


J.J. Major; A.E. East; J.E. O'Connor; G.E. Grant; A.C. Wilcox; C.S. Magirl; M.J. Collins; D.D. Tullos , 2017 , Geomorphic Responses to Dam Removal in the United States – a Two-Decade Perspective