Premium
Physical Artifices and Formulas for Approximating Water Table Fall in Tile‐Drained Land
Author(s) -
Kirkham Don
Publication year - 1964
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/sssaj1964.03615995002800050007x
Subject(s) - streamlines, streaklines, and pathlines , impervious surface , tile , water table , table (database) , hydrology (agriculture) , equator , tile drainage , geology , soil science , mathematics , geotechnical engineering , soil water , mechanics , groundwater , geography , computer science , geodesy , physics , archaeology , data mining , latitude , biology , ecology
Two physical artifices are used to simplify the mathematics of the falling water table in tile‐drained land. One artifice is to insert in the soil rigid frictionless, infinitesimally thin, impervious membranes along the natural soilwater seepage streamlines, or along approximate streamlines. The second artifice [one used previously by the author (4)] is to replace soil by gravel in the region above the level of the drain tube centers. The gravel is subsequently, for final derived formulas, replaced by soil. The formulas are shown, theoretically, to be “on the safe side” for drainage design. The formulas agree with experimental data.