Advisor

Curt Peterson

Date of Award

Summer 1-1-2012

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Geology

Department

Geology

Physical Description

1 online resource (x, 100 p.) : col. ill., col. maps + 1 geologic data set (dbf file)

Subjects

Aquifers -- Oregon -- Florence, Drinking water -- Contamination -- Oregon -- Florence, Geospatial data -- Oregon -- Florence -- Observations

DOI

10.15760/etd.530

Abstract

The North Florence Dunal Aquifer is the only feasible source for drinking water for the coastal city of Florence, Oregon and Florence's Urban Growth Boundary. High infiltration rates and a shallow groundwater table leave the aquifer highly susceptible to contamination from septic tank effluent, storm runoff, chemical fertilizers and recreational ATV use throughout the dunes. Public interest in the quality and quantity of the aquifer water has been sparked since the City of Florence received a grant from the Environmental Protection Agency for a watershed protection and restoration project. Delineation of the shallow groundwater surface and its relationship to the surface water bodies within the dunes is crucial in protecting this drinking water source from contamination. This thesis project created a GIS representation of the shallow groundwater elevation and associated prediction error map. Surface water bodies were confirmed as window lakes into the dunal aquifer and no signs of perched aquifer conditions were observed between Holocene and Pleistocene dunes. Ground Penetrating Radar, well data provided by the city of Florence and LiDAR were the primary sources for data collection.

Description

Supplemental file of Florence Groundwater data requires Microsoft Excel or Microsoft Access software for viewing.

Persistent Identifier

http://archives.pdx.edu/ds/psu/8472

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