DRASTIC Hydrogeologic Settings Modified for Fractured Till: Part 1. theory

To better evaluate the effect of fractured till, the ground water vulnerability assessment model, DRASTIC, was modified. Glacial till was eventually recognized as a unique vadose zone media, and different ratings were assigned to the various till lithologies. It was determined that thin, weathered,...

Full description

Saved in:
Bibliographic Details
Published inThe Ohio journal of science Vol. 106; no. 2; p. 45
Main Authors Weatherington-Rice, Julie, Christy, Ann D, Angle, Michael P, Aller, Linda
Format Journal Article
LanguageEnglish
Published Ohio Academy of Science 01.04.2006
Subjects
Drift
Fractures (Geology)
Ohio
Online AccessGet full text

Cover

More Information
Summary:To better evaluate the effect of fractured till, the ground water vulnerability assessment model, DRASTIC, was modified. Glacial till was eventually recognized as a unique vadose zone media, and different ratings were assigned to the various till lithologies. It was determined that thin, weathered, highly-fractured tills should be more highly rated by increasing the rating of "R" Net Recharge and "I" Impact of the vadose zone media, where appropriate. The geographical information system (GIS) provided the tools to review and quickly modify historical mapping efforts that predate the fracture modification. The history of DRASTIC mapping in Ohio, presented the theory of modifications for fractures, and included some discussion of Ohio regulatory applications.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0030-0950
2471-9390