Department of Geology and Geological Engineering - PowerPoint Presentation

Department of Geology and Geological Engineering
Department of Geology and Geological Engineering

Department of Geology and Geological Engineering - Description


Van Tuyl Lecture Series Spring 2015 400500 pm in Berthoud Hall Room 241    Thursday March 26 2015 Dr Gordon Grant Oregon State University USDA Forest Service Pacific Northwest Research ID: 716439 Download Presentation

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evolution oregon landscapes volcanic oregon evolution volcanic landscapes surface plumbing cascades earth northwest pacific university state hydrologic 2015 geology

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Department of Geology and Geological Engineering

Van

Tuyl

Lecture Series-

Spring 2015

4:00-5:00 p.m. in Berthoud Hall Room 241

  

Thursday

,

March

26,

2015

Dr

.

Gordon Grant

Oregon State

University

USDA Forest Service, Pacific Northwest Research

Station and

College of Earth, Ocean, and Atmospheric Sciences, Oregon State University

 

From Volcanoes to Rivers: Co-evolution of Hydrologic and Geomorphic Processes in

t

he Oregon Cascades

 

Abstract:

The fundamental question I will be addressing in this talk is: How does the hydrologic “plumbing” system” evolve in volcanic landscapes, and how does the development of this plumbing feedback on the evolution of the landscape itself?

By

plumbing system I mean the network of surface and subsurface

flowpaths

by which precipitation recharges aquifers and ultimately emerges as streamflow

.

Questions like this are receiving increasing attention with the burgeoning attention being paid to the science of the Critical Zone: the thin but essential surface of the Earth between the boundary layer and bedrock where all terrestrial life occurs. Young volcanic landscapes, such as in the Cascade Range of the Pacific Northwest, offer an extraordinary laboratory for studying this co-evolution among geology, geomorphology, hydrology, and ecology, because they provide us with constructional landscapes of discernible age from which we can extract evolutionary sequences.

Drawing

on over a decade of studies in the Oregon Cascades, I will explore how channel networks and aquifers develop in volcanic terrains, the timescales involved, and the implications of this evolution for predicting where water is likely to be in the future.

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