Document Type

Patent

Publication Date

12-5-1989

Abstract

An automated tension infiltrometer including a soil contacting base to which is mounted a porous plate for interfacing the infiltrometer with the soil to be analyzed. A Marriotte column is positioned in the base so that its open bottom end abuts the porous plate. A bubble tower is also positioned in the base and has a bubbling tube operatively connected between its interior and interior of the Marriotte column. The bubble tower is adjustable to provide variable tension to the Marriotte column. First and second transducers are positioned at the upper and lower parts of the Marriotte column and continuously measure pressure changes at those positions while water from the column infiltrates into the soil. By correlating these measurements, improved precision in measuring water level is achieved, which in turn allows improved results regarding deriving soil characteristic information.

Patent Number

US 4,884,436

ISURF Reference Number

01104

Assignee

Iowa State University Research Foundation, Inc.,

Application Number

US 07/260,022

Date Filed

10-20-1988

Language

en

File Format

application/pdf

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