- Water Level Assessment Introduction

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Subsurface Mapping & Aquifer Assmt

An Introduction to Aquifer Assessment

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Water Level Assessment Introduction

Article Index
Water Level Assessment Introduction
Page 2

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STATIC WATER LEVELS
Columbia Basin Groundwater Management Area

Prepared for the
Columbia Basin GWMA Board of Directors

Prepared by
John Porcello / GSI Water Solutions

Walter Burt / GSI Water Solutions

January 22, 2009

TERMINOLOGY for BASALT AQUIFERS

Shallow          à          Wanapum Basalt
Intermediate   à   Upper Grande Ronde Basalt
Deep              à   Lower Grande Ronde Basalt

CONCLUSION #1

There Is Little, If Any, Groundwater Movement Vertically Between The Basalt Aquifers

Each Aquifer Is Separate and Distinct

Shallow (Wanapum)

Intermediate (Upper Grande Ronde)

Deep (Lower Grande Ronde)

GROUP OF NESTED OBSERVATION WELLS

The Water Level Data Tell Us Two Things

The Basalt Aquifers Are Separate And Distinct

Water Levels In The Deep Grande Ronde Are Declining

How Does This Relate To
Geologic and Geochemical Information?

What does it all mean for the future?

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Last Updated ( Thursday, 19 March 2009 )

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