Repair, Evaluation, Maintenance, and Rehabilitation Research Program: Levee Underseepage Analysis for Special Foundation Conditions
Abstract
This report describes a research study in which techniques were developed for prediction of underseepage conditions for special cases of levee and foundation geometry. The differential equations for levee underseepage were derived and programmed in finite difference form for three special cases of boundary conditions. The developed programs allow analyses that are not restricted to the boundary conditions assumed in the conventional, closed form solution, i.e., two foundation layers of uniform thickness with horizontal boundaries. The three special cases of foundation conditions that can be analyzed are as follow: a) Foundations consisting of three layers of uniform thickness with horizontal boundaries and differing horizontal and vertical permeability in each layer. b) Foundations consisting of two layers of nonuniform thickness with irregular boundaries, and c) Levee reaches where the levee alignment bends or forms a corner. Capabilities of the techniques and programs are demonstrated by comparing theoretical solutions to observed performance at eight field locations where piezometric data are available. At each location, the field permeability ratio was estimated by varying program input and seeking a match between the program output and actual observed performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1989
- Accession Number
- ADA213500
Entities
People
- Thomas F. Wolff
Organizations
- Michigan State University