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Characteristics of Water Removal in a Tile‐Drained Humic‐Gley Soil
Author(s) -
Taylor George S.,
Goins Truman
Publication year - 1957
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/sssaj1957.03615995002100060002x
Subject(s) - water table , horizon , gleysol , groundwater , hydrology (agriculture) , drainage , geology , soil horizon , hydraulic conductivity , drawdown (hydrology) , inflow , soil science , soil water , environmental science , geotechnical engineering , aquifer , mathematics , geometry , ecology , oceanography , biology
A water table was established within a few inches of the ground surface on a tile‐drained Humic‐Gley soil, after which measurements of water‐table levels and soil moisture contents were made at various time intervals. The hydraulic conductivity of the A horizon (0 to 8 inches) was considerably greater than that of the B horizon (8 to 50 inches), as shown by auger‐hole permeability measurements. The drains were located in the B horizon at an average depth of 30 inches and with a lateral spacing of 40 feet. During drawdown, the water‐table surfaces were nearly horizontal except in the region near the drains. When the water table receded from the ground surface to drain depth, approximately 0.50 inches of water were removed from the A horizon; whereas, only 0.10 inches were removed from the upper 22 inches of the B. An analysis of the drawdown and water‐removal characteristics indicated that the drains brought about rapid drainage in the A horizon but that deep seepage may account for significant water removal from the B. Although the A horizon was more than 50 times as permeable as the B, the A horizon was too shallow to permit significant water removal by lateral flow to the backfill.