00179003

Component

http://onlinepubs.trb.org...s/trr/1977/642/642-003.pdf

https://scholar.google.co...Buol&publication_year=1977

Soil moisture and temperature regimes have been used as criteria for the classification of soils in the United States since the National Cooperative Soil Survey adopted Soil Taxonomy in 1965. The quantitative criteria used to define soil moisture regimes are based on the depth, probable duration, and seasonality of soil saturation and vegetation-restricting soil dryness. Soils with morphological evidence of frequent surface flooding are identified. Soils with extremely low bearing strength because of the interaction of their mineral and organic components with ambient high moisture contents are also taxonomically identified. Criteria for soil temperature regimes encompass the mean annual soil temperature and the amplitude of the change in soil temperature from summer to winter. Permafrost conditions are identified. Limited ranges for each of these soil temperature and moisture properties are defined and readily identified by connotative formative elements in the formal taxonomic name of each soil classified in modern soil surveys. /Author/

Publication of this paper sponsored by Committee on Exploration and Classification of Earth Materials. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01411486

pp 9-12

1977

Transportation Research Record

0309026717

Print

References (7) ; Tables (2)

Climate; Geological surveying; Saturated soils; Soil types; Soil water; Soils; Temperature

Soil classification

Geotechnology; Highways

TRIS, TRB

Aug 19 1978 12:00AM

• APPLICATION OF SOIL TAXONOMY IN ENGINEERING
• CLAY STRUCTURE AND RATE PROCESS THEORY
• CLIMATIC MATERIALS CHARACTERIZATION OF FINE-GRAINED SOILS
• DESICCATION OF SOILS DERIVED FROM VOLCANIC ASH
• DIAGNOSTIC SOIL HORIZONS IN SOIL TAXONOMY
• FACTORS THAT AFFECT WATER EROSION FROM CONSTRUCTION AREAS
• PARTICLE SIZE AND MINERALOGY IN SOIL TAXONOMY
• PHYSICOCHEMICAL CONSIDERATIONS IN THERMAL SUSCEPTIBILITY OF A BASE-COURSE MATERIAL (ABRIDGMENT)
• PREDICTION MODEL FOR UNSATURATED HYDRAULIC CONDUCTIVITY OF HIGHWAY SOILS
• RAINFALL FACTORS THAT AFFECT EROSION
• RELATION BETWEEN RESILIENT MODULUS AND STRESS CONDITIONS FOR COHESIVE SUBGRADE SOILS
• SAMPLING A GLACIAL SILTY CLAY
• SOIL PROPERTIES THAT AFFECT EROSION
• SOIL SERIES AND SOIL TAXONOMY
• SOIL TAXONOMY: AN OVERVIEW