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Soil Mottling and Drainage in a Mollic Hapludalf as Related to Suitability for Septic Tank Construction
Author(s) -
Vepraskas M. J.,
Baker F. G.,
Bouma J.
Publication year - 1974
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1974.03615995003800030032x
Subject(s) - subsoil , loam , saturation (graph theory) , drainage , geology , geotechnical engineering , environmental science , septic tank , soil science , soil water , environmental engineering , mathematics , ecology , combinatorics , biology
The feasibility of septic tank construction in a fine silty Mollic Hapludalf, with a mottled subsoil overlying permanently unsaturated sand, was investigated by measuring K values and soil drainage rates in situ . Mottles with chromas of 2 inside peds in the silty clay loam subsoil indicated reducing conditions and channel and plane neoferrans indicated oxidative conditions in the larger pores. Physical data showed high K values and drainage rates at saturation, due to channels and planes, but a very strong drop of these values upon desaturation. Lack of extended saturation of the entire subsoil makes possible excavation of the silt cap and construction of a septic tank seepage bed in the underlying sand.