Paleochannels of the Salt River: presentation

Introduction

Ramon Arrowsmith, PhD.
James Tyburczy, PhD.
Kenneth Fergason, M.S. Candidate
Department of Geology
Arizona State University
ramon.arrowsmith@asu.edu
(480) 965-3541

Problem

How can we use our knowledge of the geology of the southeast Valley to improve recharge?

Idea of paleochannel

Geologic framework: geology of the Valley is one of degraded mountain ranges buried by their own debris and the intervening basins are filled with these materials.
These materials represent very attractive targets: knowledge of where they are and their extent and short term flowpaths is very important. They are 10-15x more permeable. Geology of the Valley with the paleochannel deposit extent roughed out. Red lines indicate constrained portions.
Cross-section.
Chandler quad map
Recharge sites with the paleochannel deposit extent roughed out.
Example of importance for recharge: Gilbert study: example

This is what we will do

Tools

Well information
Driller knowledge
Geologic correlation
Geophysical methods for subsurface imaging.

Advantages of g

Spectrum of tools.
Good experience using them.
EM looks good. Resistivity!
Good sensitivity to the targets
Capability of use within urban areas.
Integrated results figure from TTL.